FIELD GUIDESource-led reference
Port & Cable

P261 / Storage / Connector

PCI Express x16 164-position card-edge connector

A PCI Express x16 card-edge connector uses a 164-position mating interface in the documented Amphenol implementation.

Also called PCIe x16 PCI Express x16 slot 164-position PCIe x16 card edge

The x16 mechanical form does not by itself establish PCIe generation, active lane width, power budget or platform support.

Look for

Confirm the x16 card-edge form and then verify motherboard/device documentation for generation, lane wiring, bifurcation and power behavior.

Claim inspection dates: 2026-10-06, 2026-10-08 · Independent review pending

PCI Express x16 164-position card-edge connector: three-quarter view. Computer-generated illustration, not a photograph.

Three-quarter view Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

PCI Express x16 164-position card-edge connector: mating face. Computer-generated illustration, not a photograph.

Mating face Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

PCI Express x16 164-position card-edge connector: fitted in place. Computer-generated illustration, not a photograph.

Fitted in place Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

PCI Express x16 164-position card-edge connector: original recognition drawing, not to scale.

Recognition drawing Original schematic, not to scale. Drawing review pending.

INTERNAL SYSTEMS / EXPANSION

A full-length PCIe x16 slot may not be electrically x16

No. PCI-SIG’s CEM family distinguishes connector/card mechanical widths from the separately implemented host link, and an existing ASUS motherboard manual documents real model-specific slot and population conditions. The slot shell alone does not establish usable PCIe lanes, generation, shared chipset resources or firmware support.

Conceptual role comparison: Mechanical card-edge width versus Live motherboard wiring. Check exact board slot tables and populated-card configuration. Not to scale, no pinout or mechanical mating dimensions.
Slot length vs enabled link. Original qualitative role diagram; not mechanical artwork, not to scale or a wiring map. Source context S281 · S429.

Three checks before proceeding

  1. Read the exact motherboard model’s slot lane tables, CPU dependence and sharing notes.
  2. Confirm the add-in card’s connector, required link width and firmware restrictions.
  3. Check the actual negotiated link in reliable system diagnostics after installation.

One mistake to avoid

Selling a full-length slot as “x16 bandwidth” without reading the board manual and populated-slot constraints.

Full technical reading, sources and related identities →

Claim-specific evidence remains in the canonical record. Concept diagrams do not show any safe wiring or mechanical mating geometry.

Visual correction / P261 / Source-scoped

The key stays; the slot length changes.

SLOT / TOP VIEW

Unlike the inherited symbol, this diagram shows a receptacle channel, shared key separator and trailing-length distinction. It is not to scale and does not show contact mapping.

PCIe x16 (164-position) slot: top-view keyed PCIe expansion-slot schematic with visible short leading section and variant-length trailing section. Not a pinout or measured geometry.
Top-facing conceptual slot opening; not the add-in card edge, a rear solder view, or an insertion instruction.

Look for

Longest of these four typical keyed expansion-slot formats.

Nominal position class: 164 positions. The marks and proportions in this drawing are not pins or mechanical dimensions.

Keep the host-specific question open

Source-supported family key and position-class recognition. Stylized channel; hatching is not the contact arrangement, and there are no real tolerances, pins or measured dimensions.

A physical slot class does not prove its electrical lane wiring, generation or available power.

Source, authoring and approval scope

TE Connectivity — PCIe Gen 4 Card Edge Connectors. Product Features — x1, x4, x8, x16 standard link variants, 36, 64, 98, 164 contact positions; 1 mm pitch.

Checked 2026-10-09. New, original schematic; no source CAD, third-party photo or logo bundled. No independent engineering certification is claimed; underlying source review dates are unchanged.

Signal-path fieldbook

Before a cable or module is ordered.

Read the answer, keep mechanical fit separate from the signal path, and verify the named endpoint. These editorial studies reuse inherited source records; no compatibility has been laboratory confirmed.

V106N04 / host storageDevice qualification required

Why does a full-length PCIe x16 slot run a card at x4 or x1?

Field answerA physically x16 card-edge socket does not establish its wired lane count. Amphenol identifies an x16-shaped 164-position part; a different ASUS board-specific manual describes an x16-length chipset slot that works at x4, or drops to x1 under specified slot-population conditions.

Conceptual storage path: host board and controller, exact connector or cable ends, transport support, and storage endpoint must each be checked independently.
Interpretation study, not a wiring or mating diagram. In order: Identify the board/controller and the specific socket label. / Trace the documented cable ends and the intended interface or lanes. / Confirm the device, power and mode; physical fit is not qualification. This is not evidence of a working connection.

Four checks that must stay separate

Evidence layerWhat is established or still conditional
Card edge shapeAmphenol part 10146067-113A0LF is a PCIe x16 connector body; this does not tell you an installed motherboard’s wiring.
Lanes actually routedASUS PRIME B550-PLUS AC-HES has a named chipset x16_4 slot whose documented mode depends on other occupied slots.
Generation, cards and firmwareElectrical speed, lane negotiation, bifurcation, physical clearance and supported add-in cards are separate named-host questions.
Manufacturer scopeS281 applies to one connector product; S429 applies to the AC-HES board variant, not every ASUS B550 or PCIe slot.

Check next, in this order

  1. Identify the exact motherboard revision and slot identifier in its own manual.
  2. Read the lane-sharing or slot-population table and record other cards installed before changes.
  3. Confirm card requirements, active negotiated link details and any BIOS/firmware limitation with the actual host vendor.

Not yet established The inherited board example does not establish the wiring, negotiated mode, lane bifurcation, physical clearance or performance of another board or a particular card.

Read the claim and manufacturer source boundaries

Existing scoped claims: C261A (V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.); C261C (E18712 printed vi and layout 1-2; exact board and population condition, not a universal PCIe x16 lane rule.). No newly authored empirical specifications; manufacturer catalogue claims remain conditional on the actual part and host.

  • S281 · Amphenol Communications SolutionsPart specification detail; inherited review 2026-10-06. Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.
  • S429 · ASUSE18712, First Edition, July 2021; specification summary printed vi–vii and layout 1-2. PDF pages 2, 6, 7 and 12 visually inspected.; inherited review 2026-10-08. Not the ordinary PRIME B550-PLUS or every B550 motherboard. Selected internal groups only; no current BIOS verification, boot qualification, entire port inventory or hardware test. Manual conditions must not be generalized.

Existing inspection dates remain unchanged. This editorial synthesis is not a physical mating test, pinout, optical budget, manufacturer device approval or deployment authorization.

The useful distinction

Recognize it. Then verify it.

A PCI Express x16 card-edge connector uses a 164-position mating interface in the documented Amphenol implementation. [C261A]

The AC-HES manual distinguishes physical x16 slots from wired modes: the chipset PCIe 3.0 x16_4 slot supports x4 mode, falling to x1 when any of the specified x16_2, x16_3 or x16_5 slots is occupied. [C261C]

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts164S281Source-backed nominal position/contact count: 164.
Positions / cavity span164 (Claim C261A); 164 (Claim C261B)S281 · S324Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof. V48 product-level mechanical identifier only; no universal PCIe lane assignment, generation support or motherboard implementation is inferred.
Contact pitch1 mm Contact pitch (Recorded example component); 1 mm Source-described pitch / centerline (Claim C261B); 1 mm centerline (10146067-113A0LF)S324 · S281Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. example_component; vertical PCI Express x16 card-edge connector example V48 product-level mechanical identifier only; no universal PCIe lane assignment, generation support or motherboard implementation is inferred. 10146067-113A0LF. Documented role: socket. 164positions; vertical solder-terminated connector.1.57mm PCB thickness excluded from connector geometry. Drawing web text lacks dimensions; direct403.
Connector rolecard-edge; socket (10146067-113A0LF)S281 · S324 · S281Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. vertical PCI Express x16 card-edge connector example 10146067-113A0LF. Documented role: socket. 164positions; vertical solder-terminated connector.1.57mm PCB thickness excluded from connector geometry. Drawing web text lacks dimensions; direct403.
ManufacturerAmphenol Communications Solutions (10146067-113A0LF)S281Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 10146067-113A0LF. Documented role: socket. 164positions; vertical solder-terminated connector.1.57mm PCB thickness excluded from connector geometry. Drawing web text lacks dimensions; direct403.
SeriesPCI Express Gen4/Gen5 card-edge (10146067-113A0LF)S281Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 10146067-113A0LF. Documented role: socket. 164positions; vertical solder-terminated connector.1.57mm PCB thickness excluded from connector geometry. Drawing web text lacks dimensions; direct403.
Exact part / implementation10146067-113A0LF (10146067-113A0LF)S281Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 10146067-113A0LF. Documented role: socket. 164positions; vertical solder-terminated connector.1.57mm PCB thickness excluded from connector geometry. Drawing web text lacks dimensions; direct403.

Not recorded: Populated contacts, Contact rows, Dimensions / axis, Contact gender / arrangement, Mounting, Coupling / latch, Keying / polarization, Shell / form, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits
  • The 164-position x16 connector form does not by itself establish PCIe generation, lane enablement, bifurcation, power budget or motherboard behavior.
  • Product pitch and orientation do not constitute a fabrication drawing or slot-compliance gauge.
  • 3M Gen 5 PCIe x16 extender pinout: 3M sheet 5 X16 PINOUT TABLE, Edgecard pin # to CEM pin #. Side A/B as labelled; no unverified spatial mirroring.
  • PICMG design-guide x16 reference slot: Source schematic contact identities A1-A82 / B1-B82. The two columns are schematic symbol sides, not a verified mating-face or solder-side view.
Report a correction to these facts →

Bounded facts, visible unknowns

Specifications and limits

PCI Express x16 164-position card-edge connector facts and limitations
Documented identification164-position/contact recognition fact in the cited implementation. [C261A]
Physical size versus wired lanesAC-HES example: one physical x16 slot has x4 mode and a documented x1 population condition. [C261C]
Mechanical dimensionsNo independently reviewed mechanical drawing in V43; do not use this page for fabrication, fit testing or tolerance work.
Engineering pinoutSource-checked engineering profile available; independent review pending. Open engineering profile →
Verified device listNot included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.

Use the source-backed form or position count only for identification. Resolve ratings, protocol, direction, wiring, cable construction and exact device support from the relevant equipment and component documentation.

Before you connect

What to check

  1. Identify the exact connector family and variant from the equipment or cable documentation.
  2. Keep shape, contact count, protocol, electrical rating and device support as separate facts.
  3. Do not force, rewire or adapt a connector from this recognition record; resolve the remaining requirements first.
Trace a supported connection class →

Pins & wiring

Pinout

Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.

What the status labels mean
Confirmed
Recorded research passes agree within this variant; this is not independent human review or hardware validation.
Single source
Only one underlying document, or one pass, supports this assignment.
Device-specific
Supported for the named equipment or wiring only. Check your device’s manual.
Unverified
Missing or conflicting evidence. Do not wire from this row.
Not connected
The source explicitly says NC, no contact or no pin for this wiring.
Wiring variant

3M Gen 5 PCIe x16 extender pinout

View and evidence limits

3M sheet 5 X16 PINOUT TABLE, Edgecard pin # to CEM pin #. Side A/B as labelled; no unverified spatial mirroring.

  • P261 PCIe x16 — **Partial; reference-clock conflict remains** — A's 3M Gen 5 extender and B's PICMG design-guide connector-symbol assignments agree on lane/contact placement after three transcription corrections described below. B distinguishes connector-symbol polarity from deliberately inverted module-side nets; PICMG permits data-lane inversion. A13/A14 clock polarity remains unverified in B because PICMG and Mellanox disagree; data-lane inversion does not settle a clock conflict. Modern 3M CLKREQ#/PWRBRK#/MFG/NC assignments differ from older guide reserved labels at B12/B30/A19 and other positions. Different documents; no universal revision-independent map.
  • All grounds tied together in PCBs, per drawing. This Gen 5 product includes MFG/CLKREQ#/PWRBRK#; older reserved assignments are not silently updated.
PCI Express x16 164-position card-edge engineering boundary3M sheet 5 X16 PINOUT TABLE, Edgecard pin # to CEM pin #. Side A/B as labelled; no unverified spatial mirroring.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manualA1: PRSNT#1 (single_source)A1A2: +12V (single_source)A2A3: +12V (single_source)A3A4: GND (single_source)A4A5: JTAG2 (single_source)A5A6: JTAG3 (single_source)A6A7: JTAG4 (single_source)A7A8: JTAG5 (single_source)A8A9: +3.3V (single_source)A9A10: +3.3V (single_source)A10A11: PERST# (single_source)A11A12: GND (single_source)A12A13: Not confirmed (unverified)A13A14: Not confirmed (unverified)A14A15: GND (single_source)A15A16: PERp(0) (single_source)A16A17: PERn(0) (single_source)A17A18: GND (single_source)A18A19: MFG (single_source)A19A20: GND (single_source)A20A21: PERp(1) (single_source)A21A22: PERn(1) (single_source)A22A23: GND (single_source)A23A24: GND (single_source)A24A25: PERp(2) (single_source)A25A26: PERn(2) (single_source)A26A27: GND (single_source)A27A28: GND (single_source)A28A29: PERp(3) (single_source)A29A30: PERn(3) (single_source)A30A31: GND (single_source)A31A32: NC (not_connected)A32A33: NC (not_connected)A33A34: GND (single_source)A34A35: PERp(4) (single_source)A35A36: PERn(4) (single_source)A36A37: GND (single_source)A37A38: GND (single_source)A38A39: PERp(5) (single_source)A39A40: PERn(5) (single_source)A40A41: GND (single_source)A41A42: GND (single_source)A42A43: PERp(6) (single_source)A43A44: PERn(6) (single_source)A44A45: GND (single_source)A45A46: GND (single_source)A46A47: PERp(7) (single_source)A47A48: PERn(7) (single_source)A48A49: GND (single_source)A49A50: NC (not_connected)A50A51: GND (single_source)A51A52: PERp(8) (single_source)A52A53: PERn(8) (single_source)A53A54: GND (single_source)A54A55: GND (single_source)A55A56: PERp(9) (single_source)A56A57: PERn(9) (single_source)A57A58: GND (single_source)A58A59: GND (single_source)A59A60: PERp(10) (single_source)A60A61: PERn(10) (single_source)A61A62: GND (single_source)A62A63: GND (single_source)A63A64: PERp(11) (single_source)A64A65: PERn(11) (single_source)A65A66: GND (single_source)A66A67: GND (single_source)A67A68: PERp(12) (single_source)A68A69: PERn(12) (single_source)A69A70: GND (single_source)A70A71: GND (single_source)A71A72: PERp(13) (single_source)A72A73: PERn(13) (single_source)A73A74: GND (single_source)A74A75: GND (single_source)A75A76: PERp(14) (single_source)A76A77: PERn(14) (single_source)A77A78: GND (single_source)A78A79: GND (single_source)A79A80: PERp(15) (single_source)A80A81: PERn(15) (single_source)A81A82: GND (single_source)A82B1: +12V (single_source)B1B2: +12V (single_source)B2B3: +12V (single_source)B3B4: GND (single_source)B4B5: SMCLK (single_source)B5B6: SMDAT (single_source)B6B7: GND (single_source)B7B8: +3.3V (single_source)B8B9: JTAG1 (single_source)B9B10: 3.3Vaux (single_source)B10B11: WAKE# (single_source)B11B12: CLKREQ# (single_source)B12B13: GND (single_source)B13B14: PETp(0) (single_source)B14B15: PETn(0) (single_source)B15B16: GND (single_source)B16B17: PRSNT2# (single_source)B17B18: GND (single_source)B18B19: PETp(1) (single_source)B19B20: PETn(1) (single_source)B20B21: GND (single_source)B21B22: GND (single_source)B22B23: PETp(2) (single_source)B23B24: PETn(2) (single_source)B24B25: GND (single_source)B25B26: GND (single_source)B26B27: PETp(3) (single_source)B27B28: PETn(3) (single_source)B28B29: GND (single_source)B29B30: PWRBRK# (single_source)B30B31: PRSNT2# (single_source)B31B32: GND (single_source)B32B33: PETp(4) (single_source)B33B34: PETn(4) (single_source)B34B35: GND (single_source)B35B36: GND (single_source)B36B37: PETp(5) (single_source)B37B38: PETn(5) (single_source)B38B39: GND (single_source)B39B40: GND (single_source)B40B41: PETp(6) (single_source)B41B42: PETn(6) (single_source)B42B43: GND (single_source)B43B44: GND (single_source)B44B45: PETp(7) (single_source)B45B46: PETn(7) (single_source)B46B47: GND (single_source)B47B48: PRSNT2# (single_source)B48B49: GND (single_source)B49B50: PETp(8) (single_source)B50B51: PETn(8) (single_source)B51B52: GND (single_source)B52B53: GND (single_source)B53B54: PETp(9) (single_source)B54B55: PETn(9) (single_source)B55B56: GND (single_source)B56B57: GND (single_source)B57B58: PETp(10) (single_source)B58B59: PETn(10) (single_source)B59B60: GND (single_source)B60B61: GND (single_source)B61B62: PETp(11) (single_source)B62B63: PETn(11) (single_source)B63B64: GND (single_source)B64B65: GND (single_source)B65B66: PETp(12) (single_source)B66B67: PETn(12) (single_source)B67B68: GND (single_source)B68B69: GND (single_source)B69B70: PETp(13) (single_source)B70B71: PETn(13) (single_source)B71B72: GND (single_source)B72B73: GND (single_source)B73B74: PETp(14) (single_source)B74B75: PETn(14) (single_source)B75B76: GND (single_source)B76B77: GND (single_source)B77B78: PETp(15) (single_source)B78B79: PETn(15) (single_source)B79B80: GND (single_source)B80B81: PRSNT2# (single_source)B81B82: NC (not_connected)B82powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
3M Gen 5 PCIe x16 extender pinout — source-scoped contact map
PinSignalWhat it doesStatus
A1PRSNT#1Control, detection or configuration connection; check the source and device.Single source
Sources
A2+12VPower connection (+12V). Check the specified supply.Single source
Sources
A3+12VPower connection (+12V). Check the specified supply.Single source
Sources
A4GNDGround reference and return.Single source
Sources
A5JTAG2Control, detection or configuration connection; check the source and device.Single source
Sources
A6JTAG3Control, detection or configuration connection; check the source and device.Single source
Sources
A7JTAG4Control, detection or configuration connection; check the source and device.Single source
Sources
A8JTAG5Control, detection or configuration connection; check the source and device.Single source
Sources
A9+3.3VPower connection (+3.3V). Check the specified supply.Single source
Sources
A10+3.3VPower connection (+3.3V). Check the specified supply.Single source
Sources
A11PERST#Reset control; check active level and the named device.Single source
Sources
A12GNDGround reference and return.Single source
Sources
A13Not confirmedNo settled assignment. Do not wire from this row.Unverified
Sources
A14Not confirmedNo settled assignment. Do not wire from this row.Unverified
Sources
A15GNDGround reference and return.Single source
Sources
A16PERp(0)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A17PERn(0)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A18GNDGround reference and return.Single source
Sources
A19MFGControl, detection or configuration connection; check the source and device.Single source
Sources
A20GNDGround reference and return.Single source
Sources
A21PERp(1)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A22PERn(1)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A23GNDGround reference and return.Single source
Sources
A24GNDGround reference and return.Single source
Sources
A25PERp(2)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A26PERn(2)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A27GNDGround reference and return.Single source
Sources
A28GNDGround reference and return.Single source
Sources
A29PERp(3)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A30PERn(3)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A31GNDGround reference and return.Single source
Sources
A32NCNot connected or absent in this named wiring.Not connected
Sources
A33NCNot connected or absent in this named wiring.Not connected
Sources
A34GNDGround reference and return.Single source
Sources
A35PERp(4)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A36PERn(4)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A37GNDGround reference and return.Single source
Sources
A38GNDGround reference and return.Single source
Sources
A39PERp(5)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A40PERn(5)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A41GNDGround reference and return.Single source
Sources
A42GNDGround reference and return.Single source
Sources
A43PERp(6)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A44PERn(6)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A45GNDGround reference and return.Single source
Sources
A46GNDGround reference and return.Single source
Sources
A47PERp(7)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A48PERn(7)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A49GNDGround reference and return.Single source
Sources
A50NCNot connected or absent in this named wiring.Not connected
Sources
A51GNDGround reference and return.Single source
Sources
A52PERp(8)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A53PERn(8)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A54GNDGround reference and return.Single source
Sources
A55GNDGround reference and return.Single source
Sources
A56PERp(9)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A57PERn(9)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A58GNDGround reference and return.Single source
Sources
A59GNDGround reference and return.Single source
Sources
A60PERp(10)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A61PERn(10)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A62GNDGround reference and return.Single source
Sources
A63GNDGround reference and return.Single source
Sources
A64PERp(11)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A65PERn(11)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A66GNDGround reference and return.Single source
Sources
A67GNDGround reference and return.Single source
Sources
A68PERp(12)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A69PERn(12)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A70GNDGround reference and return.Single source
Sources
A71GNDGround reference and return.Single source
Sources
A72PERp(13)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A73PERn(13)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A74GNDGround reference and return.Single source
Sources
A75GNDGround reference and return.Single source
Sources
A76PERp(14)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A77PERn(14)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A78GNDGround reference and return.Single source
Sources
A79GNDGround reference and return.Single source
Sources
A80PERp(15)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A81PERn(15)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
A82GNDGround reference and return.Single source
Sources
B1+12VPower connection (+12V). Check the specified supply.Single source
Sources
B2+12VPower connection (+12V). Check the specified supply.Single source
Sources
B3+12VPower connection (+12V). Check the specified supply.Single source
Sources
B4GNDGround reference and return.Single source
Sources
B5SMCLKClock or clock-control connection, as named by this source.Single source
Sources
B6SMDATControl, detection or configuration connection; check the source and device.Single source
Sources
B7GNDGround reference and return.Single source
Sources
B8+3.3VPower connection (+3.3V). Check the specified supply.Single source
Sources
B9JTAG1Control, detection or configuration connection; check the source and device.Single source
Sources
B103.3VauxPower connection (3.3Vaux). Check the specified supply.Single source
Sources
B11WAKE#Control, detection or configuration connection; check the source and device.Single source
Sources
B12CLKREQ#Clock or clock-control connection, as named by this source.Single source
Sources
B13GNDGround reference and return.Single source
Sources
B14PETp(0)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B15PETn(0)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B16GNDGround reference and return.Single source
Sources
B17PRSNT2#Control, detection or configuration connection; check the source and device.Single source
Sources
B18GNDGround reference and return.Single source
Sources
B19PETp(1)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B20PETn(1)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B21GNDGround reference and return.Single source
Sources
B22GNDGround reference and return.Single source
Sources
B23PETp(2)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B24PETn(2)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B25GNDGround reference and return.Single source
Sources
B26GNDGround reference and return.Single source
Sources
B27PETp(3)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B28PETn(3)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B29GNDGround reference and return.Single source
Sources
B30PWRBRK#Control, detection or configuration connection; check the source and device.Single source
Sources
B31PRSNT2#Control, detection or configuration connection; check the source and device.Single source
Sources
B32GNDGround reference and return.Single source
Sources
B33PETp(4)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B34PETn(4)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B35GNDGround reference and return.Single source
Sources
B36GNDGround reference and return.Single source
Sources
B37PETp(5)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B38PETn(5)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B39GNDGround reference and return.Single source
Sources
B40GNDGround reference and return.Single source
Sources
B41PETp(6)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B42PETn(6)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B43GNDGround reference and return.Single source
Sources
B44GNDGround reference and return.Single source
Sources
B45PETp(7)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B46PETn(7)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B47GNDGround reference and return.Single source
Sources
B48PRSNT2#Control, detection or configuration connection; check the source and device.Single source
Sources
B49GNDGround reference and return.Single source
Sources
B50PETp(8)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B51PETn(8)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B52GNDGround reference and return.Single source
Sources
B53GNDGround reference and return.Single source
Sources
B54PETp(9)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B55PETn(9)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B56GNDGround reference and return.Single source
Sources
B57GNDGround reference and return.Single source
Sources
B58PETp(10)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B59PETn(10)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B60GNDGround reference and return.Single source
Sources
B61GNDGround reference and return.Single source
Sources
B62PETp(11)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B63PETn(11)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B64GNDGround reference and return.Single source
Sources
B65GNDGround reference and return.Single source
Sources
B66PETp(12)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B67PETn(12)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B68GNDGround reference and return.Single source
Sources
B69GNDGround reference and return.Single source
Sources
B70PETp(13)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B71PETn(13)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B72GNDGround reference and return.Single source
Sources
B73GNDGround reference and return.Single source
Sources
B74PETp(14)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B75PETn(14)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B76GNDGround reference and return.Single source
Sources
B77GNDGround reference and return.Single source
Sources
B78PETp(15)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B79PETn(15)Signal conductor. Pair, polarity and direction follow this named wiring.Single source
Sources
B80GNDGround reference and return.Single source
Sources
B81PRSNT2#Control, detection or configuration connection; check the source and device.Single source
Sources
B82NCNot connected or absent in this named wiring.Not connected
Sources
Sources (1)

PICMG design-guide x16 reference slot

View and evidence limits

Source schematic contact identities A1-A82 / B1-B82. The two columns are schematic symbol sides, not a verified mating-face or solder-side view.

  • P261 PCIe x16 — **Partial; reference-clock conflict remains** — A's 3M Gen 5 extender and B's PICMG design-guide connector-symbol assignments agree on lane/contact placement after three transcription corrections described below. B distinguishes connector-symbol polarity from deliberately inverted module-side nets; PICMG permits data-lane inversion. A13/A14 clock polarity remains unverified in B because PICMG and Mellanox disagree; data-lane inversion does not settle a clock conflict. Modern 3M CLKREQ#/PWRBRK#/MFG/NC assignments differ from older guide reserved labels at B12/B30/A19 and other positions. Different documents; no universal revision-independent map.
  • This design guide is explicitly not a substitute for the PCI-SIG Card Electromechanical specification. No mechanical footprint or board mirror is supplied here.
  • A13/A14 reference-clock polarity conflicts between the PICMG guide and Mellanox manual remain unverified.
  • This is a source-scoped research map; PCI-SIG CEM normative revisions, later sideband assignments, exact card-side orientation and PCB termination mirrors were not independently established.
PCI Express x16 164-position card-edge engineering boundarySource schematic contact identities A1-A82 / B1-B82. The two columns are schematic symbol sides, not a verified mating-face or solder-side view.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manualA1: PRSNT1# (single_source)A1A2: +12V (single_source)A2A3: +12V (single_source)A3A4: GND (single_source)A4A5: JTAG2 (single_source)A5A6: JTAG3 (single_source)A6A7: JTAG4 (single_source)A7A8: JTAG5 (single_source)A8A9: +3.3V (single_source)A9A10: +3.3V (single_source)A10A11: PERST# (single_source)A11A12: GND (single_source)A12A13: Not confirmed (unverified)A13A14: Not confirmed (unverified)A14A15: GND (single_source)A15A16: HSIP_0 (single_source)A16A17: HSIN_0 (single_source)A17A18: GND (single_source)A18A19: RSVD5 (single_source)A19A20: GND (single_source)A20A21: HSIP_1 (single_source)A21A22: HSIN_1 (single_source)A22A23: GND (single_source)A23A24: GND (single_source)A24A25: HSIP_2 (single_source)A25A26: HSIN_2 (single_source)A26A27: GND (single_source)A27A28: GND (single_source)A28A29: HSIP_3 (single_source)A29A30: HSIN_3 (single_source)A30A31: GND (single_source)A31A32: RSVD6 (single_source)A32A33: RSVD7 (single_source)A33A34: GND (single_source)A34A35: HSIP_4 (single_source)A35A36: HSIN_4 (single_source)A36A37: GND (single_source)A37A38: GND (single_source)A38A39: HSIP_5 (single_source)A39A40: HSIN_5 (single_source)A40A41: GND (single_source)A41A42: GND (single_source)A42A43: HSIP_6 (single_source)A43A44: HSIN_6 (single_source)A44A45: GND (single_source)A45A46: GND (single_source)A46A47: HSIP_7 (single_source)A47A48: HSIN_7 (single_source)A48A49: GND (single_source)A49A50: RSVD8 (single_source)A50A51: GND (single_source)A51A52: HSIP_8 (single_source)A52A53: HSIN_8 (single_source)A53A54: GND (single_source)A54A55: GND (single_source)A55A56: HSIP_9 (single_source)A56A57: HSIN_9 (single_source)A57A58: GND (single_source)A58A59: GND (single_source)A59A60: HSIP_10 (single_source)A60A61: HSIN_10 (single_source)A61A62: GND (single_source)A62A63: GND (single_source)A63A64: HSIP_11 (single_source)A64A65: HSIN_11 (single_source)A65A66: GND (single_source)A66A67: GND (single_source)A67A68: HSIP_12 (single_source)A68A69: HSIN_12 (single_source)A69A70: GND (single_source)A70A71: GND (single_source)A71A72: HSIP_13 (single_source)A72A73: HSIN_13 (single_source)A73A74: GND (single_source)A74A75: GND (single_source)A75A76: HSIP_14 (single_source)A76A77: HSIN_14 (single_source)A77A78: GND (single_source)A78A79: GND (single_source)A79A80: HSIP_15 (single_source)A80A81: HSIN_15 (single_source)A81A82: GND (single_source)A82B1: +12V (single_source)B1B2: +12V (single_source)B2B3: +12V (single_source)B3B4: GND (single_source)B4B5: SMCLK (single_source)B5B6: SMDAT (single_source)B6B7: GND (single_source)B7B8: +3.3V (single_source)B8B9: JTAG1 (single_source)B9B10: 3.3VAUX (single_source)B10B11: WAKE# (single_source)B11B12: RSVD2 (single_source)B12B13: GND (single_source)B13B14: HSOP_0 (single_source)B14B15: HSON_0 (single_source)B15B16: GND (single_source)B16B17: PRSNT2# (single_source)B17B18: GND (single_source)B18B19: HSOP_1 (single_source)B19B20: HSON_1 (single_source)B20B21: GND (single_source)B21B22: GND (single_source)B22B23: HSOP_2 (single_source)B23B24: HSON_2 (single_source)B24B25: GND (single_source)B25B26: GND (single_source)B26B27: HSOP_3 (single_source)B27B28: HSON_3 (single_source)B28B29: GND (single_source)B29B30: RSVD3 (single_source)B30B31: PRSNT2#1 (single_source)B31B32: GND (single_source)B32B33: HSOP_4 (single_source)B33B34: HSON_4 (single_source)B34B35: GND (single_source)B35B36: GND (single_source)B36B37: HSOP_5 (single_source)B37B38: HSON_5 (single_source)B38B39: GND (single_source)B39B40: GND (single_source)B40B41: HSOP_6 (single_source)B41B42: HSON_6 (single_source)B42B43: GND (single_source)B43B44: GND (single_source)B44B45: HSOP_7 (single_source)B45B46: HSON_7 (single_source)B46B47: GND (single_source)B47B48: PRSNT2#2 (single_source)B48B49: GND (single_source)B49B50: HSOP_8 (single_source)B50B51: HSON_8 (single_source)B51B52: GND (single_source)B52B53: GND (single_source)B53B54: HSOP_9 (single_source)B54B55: HSON_9 (single_source)B55B56: GND (single_source)B56B57: GND (single_source)B57B58: HSOP_10 (single_source)B58B59: HSON_10 (single_source)B59B60: GND (single_source)B60B61: GND (single_source)B61B62: HSOP_11 (single_source)B62B63: HSON_11 (single_source)B63B64: GND (single_source)B64B65: GND (single_source)B65B66: HSOP_12 (single_source)B66B67: HSON_12 (single_source)B67B68: GND (single_source)B68B69: GND (single_source)B69B70: HSOP_13 (single_source)B70B71: HSON_13 (single_source)B71B72: GND (single_source)B72B73: GND (single_source)B73B74: HSOP_14 (single_source)B74B75: HSON_14 (single_source)B75B76: GND (single_source)B76B77: GND (single_source)B77B78: HSOP_15 (single_source)B78B79: HSON_15 (single_source)B79B80: GND (single_source)B80B81: PRSNT2#3 (single_source)B81B82: RSVD4 (single_source)B82powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
PICMG design-guide x16 reference slot — source-scoped contact map
PinSignalWhat it doesStatus
A1PRSNT1#Control, detection or configuration connection; check the source and device.Single source
Sources
A2+12VPower connection (+12V). Check the specified supply.Single source
Sources
A3+12VPower connection (+12V). Check the specified supply.Single source
Sources
A4GNDGround reference and return.Single source
Sources
A5JTAG2Control, detection or configuration connection; check the source and device.Single source
Sources
A6JTAG3Control, detection or configuration connection; check the source and device.Single source
Sources
A7JTAG4Control, detection or configuration connection; check the source and device.Single source
Sources
A8JTAG5Control, detection or configuration connection; check the source and device.Single source
Sources
A9+3.3VPower connection (+3.3V). Check the specified supply.Single source
Sources
A10+3.3VPower connection (+3.3V). Check the specified supply.Single source
Sources
A11PERST#Reset control; check active level and the named device.Single source
Sources
A12GNDGround reference and return.Single source
Sources
A13Not confirmedNo settled assignment. Do not wire from this row.Unverified
Sources
A14Not confirmedNo settled assignment. Do not wire from this row.Unverified
Sources
A15GNDGround reference and return.Single source
Sources
A16HSIP_0Control, detection or configuration connection; check the source and device.Single source
Sources
A17HSIN_0Control, detection or configuration connection; check the source and device.Single source
Sources
A18GNDGround reference and return.Single source
Sources
A19RSVD5Reserved; no general-purpose wiring is established.Single source
Sources
A20GNDGround reference and return.Single source
Sources
A21HSIP_1Control, detection or configuration connection; check the source and device.Single source
Sources
A22HSIN_1Control, detection or configuration connection; check the source and device.Single source
Sources
A23GNDGround reference and return.Single source
Sources
A24GNDGround reference and return.Single source
Sources
A25HSIP_2Control, detection or configuration connection; check the source and device.Single source
Sources
A26HSIN_2Control, detection or configuration connection; check the source and device.Single source
Sources
A27GNDGround reference and return.Single source
Sources
A28GNDGround reference and return.Single source
Sources
A29HSIP_3Control, detection or configuration connection; check the source and device.Single source
Sources
A30HSIN_3Control, detection or configuration connection; check the source and device.Single source
Sources
A31GNDGround reference and return.Single source
Sources
A32RSVD6Reserved; no general-purpose wiring is established.Single source
Sources
A33RSVD7Reserved; no general-purpose wiring is established.Single source
Sources
A34GNDGround reference and return.Single source
Sources
A35HSIP_4Control, detection or configuration connection; check the source and device.Single source
Sources
A36HSIN_4Control, detection or configuration connection; check the source and device.Single source
Sources
A37GNDGround reference and return.Single source
Sources
A38GNDGround reference and return.Single source
Sources
A39HSIP_5Control, detection or configuration connection; check the source and device.Single source
Sources
A40HSIN_5Control, detection or configuration connection; check the source and device.Single source
Sources
A41GNDGround reference and return.Single source
Sources
A42GNDGround reference and return.Single source
Sources
A43HSIP_6Control, detection or configuration connection; check the source and device.Single source
Sources
A44HSIN_6Control, detection or configuration connection; check the source and device.Single source
Sources
A45GNDGround reference and return.Single source
Sources
A46GNDGround reference and return.Single source
Sources
A47HSIP_7Control, detection or configuration connection; check the source and device.Single source
Sources
A48HSIN_7Control, detection or configuration connection; check the source and device.Single source
Sources
A49GNDGround reference and return.Single source
Sources
A50RSVD8Reserved; no general-purpose wiring is established.Single source
Sources
A51GNDGround reference and return.Single source
Sources
A52HSIP_8Control, detection or configuration connection; check the source and device.Single source
Sources
A53HSIN_8Control, detection or configuration connection; check the source and device.Single source
Sources
A54GNDGround reference and return.Single source
Sources
A55GNDGround reference and return.Single source
Sources
A56HSIP_9Control, detection or configuration connection; check the source and device.Single source
Sources
A57HSIN_9Control, detection or configuration connection; check the source and device.Single source
Sources
A58GNDGround reference and return.Single source
Sources
A59GNDGround reference and return.Single source
Sources
A60HSIP_10Control, detection or configuration connection; check the source and device.Single source
Sources
A61HSIN_10Control, detection or configuration connection; check the source and device.Single source
Sources
A62GNDGround reference and return.Single source
Sources
A63GNDGround reference and return.Single source
Sources
A64HSIP_11Control, detection or configuration connection; check the source and device.Single source
Sources
A65HSIN_11Control, detection or configuration connection; check the source and device.Single source
Sources
A66GNDGround reference and return.Single source
Sources
A67GNDGround reference and return.Single source
Sources
A68HSIP_12Control, detection or configuration connection; check the source and device.Single source
Sources
A69HSIN_12Control, detection or configuration connection; check the source and device.Single source
Sources
A70GNDGround reference and return.Single source
Sources
A71GNDGround reference and return.Single source
Sources
A72HSIP_13Control, detection or configuration connection; check the source and device.Single source
Sources
A73HSIN_13Control, detection or configuration connection; check the source and device.Single source
Sources
A74GNDGround reference and return.Single source
Sources
A75GNDGround reference and return.Single source
Sources
A76HSIP_14Control, detection or configuration connection; check the source and device.Single source
Sources
A77HSIN_14Control, detection or configuration connection; check the source and device.Single source
Sources
A78GNDGround reference and return.Single source
Sources
A79GNDGround reference and return.Single source
Sources
A80HSIP_15Control, detection or configuration connection; check the source and device.Single source
Sources
A81HSIN_15Control, detection or configuration connection; check the source and device.Single source
Sources
A82GNDGround reference and return.Single source
Sources
B1+12VPower connection (+12V). Check the specified supply.Single source
Sources
B2+12VPower connection (+12V). Check the specified supply.Single source
Sources
B3+12VPower connection (+12V). Check the specified supply.Single source
Sources
B4GNDGround reference and return.Single source
Sources
B5SMCLKClock or clock-control connection, as named by this source.Single source
Sources
B6SMDATControl, detection or configuration connection; check the source and device.Single source
Sources
B7GNDGround reference and return.Single source
Sources
B8+3.3VPower connection (+3.3V). Check the specified supply.Single source
Sources
B9JTAG1Control, detection or configuration connection; check the source and device.Single source
Sources
B103.3VAUXPower connection (3.3VAUX). Check the specified supply.Single source
Sources
B11WAKE#Control, detection or configuration connection; check the source and device.Single source
Sources
B12RSVD2Reserved; no general-purpose wiring is established.Single source
Sources
B13GNDGround reference and return.Single source
Sources
B14HSOP_0Control, detection or configuration connection; check the source and device.Single source
Sources
B15HSON_0Control, detection or configuration connection; check the source and device.Single source
Sources
B16GNDGround reference and return.Single source
Sources
B17PRSNT2#Control, detection or configuration connection; check the source and device.Single source
Sources
B18GNDGround reference and return.Single source
Sources
B19HSOP_1Control, detection or configuration connection; check the source and device.Single source
Sources
B20HSON_1Control, detection or configuration connection; check the source and device.Single source
Sources
B21GNDGround reference and return.Single source
Sources
B22GNDGround reference and return.Single source
Sources
B23HSOP_2Control, detection or configuration connection; check the source and device.Single source
Sources
B24HSON_2Control, detection or configuration connection; check the source and device.Single source
Sources
B25GNDGround reference and return.Single source
Sources
B26GNDGround reference and return.Single source
Sources
B27HSOP_3Control, detection or configuration connection; check the source and device.Single source
Sources
B28HSON_3Control, detection or configuration connection; check the source and device.Single source
Sources
B29GNDGround reference and return.Single source
Sources
B30RSVD3Reserved; no general-purpose wiring is established.Single source
Sources
B31PRSNT2#1Control, detection or configuration connection; check the source and device.Single source
Sources
B32GNDGround reference and return.Single source
Sources
B33HSOP_4Control, detection or configuration connection; check the source and device.Single source
Sources
B34HSON_4Control, detection or configuration connection; check the source and device.Single source
Sources
B35GNDGround reference and return.Single source
Sources
B36GNDGround reference and return.Single source
Sources
B37HSOP_5Control, detection or configuration connection; check the source and device.Single source
Sources
B38HSON_5Control, detection or configuration connection; check the source and device.Single source
Sources
B39GNDGround reference and return.Single source
Sources
B40GNDGround reference and return.Single source
Sources
B41HSOP_6Control, detection or configuration connection; check the source and device.Single source
Sources
B42HSON_6Control, detection or configuration connection; check the source and device.Single source
Sources
B43GNDGround reference and return.Single source
Sources
B44GNDGround reference and return.Single source
Sources
B45HSOP_7Control, detection or configuration connection; check the source and device.Single source
Sources
B46HSON_7Control, detection or configuration connection; check the source and device.Single source
Sources
B47GNDGround reference and return.Single source
Sources
B48PRSNT2#2Control, detection or configuration connection; check the source and device.Single source
Sources
B49GNDGround reference and return.Single source
Sources
B50HSOP_8Control, detection or configuration connection; check the source and device.Single source
Sources
B51HSON_8Control, detection or configuration connection; check the source and device.Single source
Sources
B52GNDGround reference and return.Single source
Sources
B53GNDGround reference and return.Single source
Sources
B54HSOP_9Control, detection or configuration connection; check the source and device.Single source
Sources
B55HSON_9Control, detection or configuration connection; check the source and device.Single source
Sources
B56GNDGround reference and return.Single source
Sources
B57GNDGround reference and return.Single source
Sources
B58HSOP_10Control, detection or configuration connection; check the source and device.Single source
Sources
B59HSON_10Control, detection or configuration connection; check the source and device.Single source
Sources
B60GNDGround reference and return.Single source
Sources
B61GNDGround reference and return.Single source
Sources
B62HSOP_11Control, detection or configuration connection; check the source and device.Single source
Sources
B63HSON_11Control, detection or configuration connection; check the source and device.Single source
Sources
B64GNDGround reference and return.Single source
Sources
B65GNDGround reference and return.Single source
Sources
B66HSOP_12Control, detection or configuration connection; check the source and device.Single source
Sources
B67HSON_12Control, detection or configuration connection; check the source and device.Single source
Sources
B68GNDGround reference and return.Single source
Sources
B69GNDGround reference and return.Single source
Sources
B70HSOP_13Control, detection or configuration connection; check the source and device.Single source
Sources
B71HSON_13Control, detection or configuration connection; check the source and device.Single source
Sources
B72GNDGround reference and return.Single source
Sources
B73GNDGround reference and return.Single source
Sources
B74HSOP_14Control, detection or configuration connection; check the source and device.Single source
Sources
B75HSON_14Control, detection or configuration connection; check the source and device.Single source
Sources
B76GNDGround reference and return.Single source
Sources
B77GNDGround reference and return.Single source
Sources
B78HSOP_15Control, detection or configuration connection; check the source and device.Single source
Sources
B79HSON_15Control, detection or configuration connection; check the source and device.Single source
Sources
B80GNDGround reference and return.Single source
Sources
B81PRSNT2#3Control, detection or configuration connection; check the source and device.Single source
Sources
B82RSVD4Reserved; no general-purpose wiring is established.Single source
Sources
Sources (2)

What is not established

This field note does not approve a connection, adapter, cable assembly, rewiring scheme or fabricated part. It intentionally omits unsupported pin assignments and mechanical tolerances.

A full-length slot need not have sixteen wired lanes

Keep the physical connector description separate from its host implementation. The AC-HES motherboard example documents narrower lane modes and a further slot-population condition; the generic connector does not determine those modes.

Your next step

Move from the form to the requirement.

Read the engineering reference Source-scoped details, orientation and explicit unknowns.Work through a connection Choose your task before deciding on a cable.Explore this evidence trail Inspect the claims and their dependencies. (private workspace)

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

Back to first citation ↑
C261ASource checked · pending review

Amphenol identifies part 10146067-113A0LF as a PCI Express x16 card-edge connector with 164 positions.

Amphenol Communications Solutions · PCI Express x16 164-position card-edge connector ↗

Locator: Part specification detail
Access: public page. Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

S281: full source recordInspect review dependencies → (private workspace)

Claim scope: V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.. Next review due 2027-01-04.

Back to first citation ↑
C261CSource checked · pending review

The AC-HES manual distinguishes physical x16 slots from wired modes: the chipset PCIe 3.0 x16_4 slot supports x4 mode, falling to x1 when any of the specified x16_2, x16_3 or x16_5 slots is occupied.

ASUS · PRIME B550-PLUS AC-HES User’s Manual ↗

Locator: E18712, First Edition, July 2021; specification summary printed vi–vii and layout 1-2. PDF pages 2, 6, 7 and 12 visually inspected.
Access: public pdf text. Not the ordinary PRIME B550-PLUS or every B550 motherboard. Selected internal groups only; no current BIOS verification, boot qualification, entire port inventory or hardware test. Manual conditions must not be generalized.

S429: full source recordInspect review dependencies → (private workspace)

Claim scope: E18712 printed vi and layout 1-2; exact board and population condition, not a universal PCIe x16 lane rule.. Next review due 2027-01-06.

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Common questions

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Why can installing M.2 disable SATA ports or change PCIe lanes?Use one exact motherboard manual to separate connector shape from CPU wiring and shared resources.

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PCIe slot size vs lane count and generationDoes the physical PCIe slot or card-edge size prove how many lanes are active or which PCIe generation the system supports?

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Add to discovery trayRecord an unsaved candidate (private workspace)

Compare look-alikes: PCIe x16 card edge versus MCIO cabled interconnect · PCIe x8 versus x16 card-edge connectors

Candidate selection does not confirm the identity or capabilities of your physical item.

Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 2 scoped claims · 0 sources with inspection/access flags.

Page scope: catalogue_expansion_v43

Assessment 2026-10-22 · earliest scheduled source review 2027-01-04. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 2 source scopes, access limits and dates

S281 · PCI Express x16 164-position card-edge connector

Amphenol Communications Solutions · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Identifies a PCI Express x16 vertical card-edge connector with 164 positions; V43 uses form and position count only.

Not established / limitations: Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

Locator: Part specification detail

S429 · PRIME B550-PLUS AC-HES User’s Manual

ASUS · Manufacturer / product-owner domain · inspected 2026-10-08 · due 2027-01-06

Within inspection window

Scoped support: Selected storage and PCIe slot roles for PRIME B550-PLUS AC-HES only, with CPU, slot population and SATA-sharing conditions.

Not established / limitations: Not the ordinary PRIME B550-PLUS or every B550 motherboard. Selected internal groups only; no current BIOS verification, boot qualification, entire port inventory or hardware test. Manual conditions must not be generalized.

Locator: E18712, First Edition, July 2021; specification summary printed vi–vii and layout 1-2. PDF pages 2, 6, 7 and 12 visually inspected.

Trace 2 claims to their source records

C261A · P261

Amphenol identifies part 10146067-113A0LF as a PCI Express x16 card-edge connector with 164 positions.

Claim scope: V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.

Source links: S281 · Evidence trail → (private workspace)

C261C · P261

The AC-HES manual distinguishes physical x16 slots from wired modes: the chipset PCIe 3.0 x16_4 slot supports x4 mode, falling to x1 when any of the specified x16_2, x16_3 or x16_5 slots is occupied.

Claim scope: E18712 printed vi and layout 1-2; exact board and population condition, not a universal PCIe x16 lane rule.

Source links: S429 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.