FIELD GUIDESource-led reference

Side by side

PCIe x16 card edge versus MCIO cabled interconnect

Is the host interface a card-edge slot or an MCIO/SFF-TA-1016 cabled interconnect family?

Computer-generated illustration, not a photograph.
P261 · ConnectorPCI Express x16 164-position card-edge connector
Computer-generated illustration, not a photograph.
P262 · ConnectorMCIO / SFF-TA-1016 connector family

How they differ

  • PCI Express x16 164-position card-edge connector Confirm the x16 card-edge form and then verify motherboard/device documentation for generation, lane wiring, bifurcation and power behavior.
  • MCIO / SFF-TA-1016 connector family Look for the MCIO / SFF-TA-1016 designation and resolve the exact circuit/lane variant before choosing a cable or mating connector.

Then askIs the host interface a card-edge slot or an MCIO/SFF-TA-1016 cabled interconnect family?

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
FieldPCI Express x16 164-position card-edge connectorMCIO / SFF-TA-1016 connector family
TypeConnectorConnector
FamilyStorageStorage
Shapecard edgeribbon
Nominal contacts164S281Source-backed nominal position/contact count: 164.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
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.148 (Claim C262B)S325Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V48 family-level mechanical context only; MCIO circuit count and pinout remain variant-specific and no universal contact map is published.
Contact rowsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
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.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Key distinctionThe x16 mechanical form does not by itself establish PCIe generation, active lane width, power budget or platform support.MCIO is a connector family, not one universal pin count. Exact lane configuration, cable assembly, host support and protocol must come from the specific implementation.

Full evidence ledger and sources ↓

Illustrations are computer-generated with prior AI visual review; independent technical and rights review pending. A comparison is not a compatibility verdict.

This comparison stays within one evidence layer.

All selected records are Connector records. Similar layer does not mean compatible, interchangeable or safe to mate.

Families represented: Storage

The reference ledger

Read the same question across.

2 selected records · 14 fields
No score. No compatibility verdict.

On a narrow screen, scroll the table sideways or open the field-by-field reading view below. Illustrations are not a size comparison.

Comparison of selected field notes; source links accompany each documented specification
What you are comparing
PCIe x16 (164-position) slot — top-facing keyed motherboard expansion slot schematic; no pinout or measured geometry; review pending
P261 / ConnectorPCI Express x16 164-position card-edge connector

Identification schematic · not to scale · drawing review pending

MCIO / SFF-TA-1016 connector family — original, not-to-scale identification schematic; drawing review pending
P262 / ConnectorMCIO / SFF-TA-1016 connector family

Identification schematic · not to scale · drawing review pending

LayerConnectorConnector
Key distinctionThe x16 mechanical form does not by itself establish PCIe generation, active lane width, power budget or platform support.MCIO is a connector family, not one universal pin count. Exact lane configuration, cable assembly, host support and protocol must come from the specific implementation.
Nominal contacts164S281Source-backed nominal position/contact count: 164.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
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.148 (Claim C262B)S325Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V48 family-level mechanical context only; MCIO circuit count and pinout remain variant-specific and no universal contact map is published.
Populated contactsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rowsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
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; direct403.0.6 mm Mating-interface pitch; 0.6 mm Source-described pitch / centerline (Claim C262B); 0.6 mm published connector family pitchS325 · S911Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. nominal_identifier; Mini Cool Edge I/O high-speed internal connector family V48 family-level mechanical context only; MCIO circuit count and pinout remain variant-specific and no universal contact map is published. Named series only, not every family part: Molex Mini Cool Edge MCIO family. 38–148circuits; vertical/right-angle/plug configurations differ. No complete part suffix or geometry inferred.
Dimensions / axisNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
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.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Coupling / latchNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Keying / polarizationNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.Anti-slant and anti-reverse contact-protection design; pull-tab optionsS911Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Named series only, not every family part: Molex Mini Cool Edge MCIO family. 38–148circuits; vertical/right-angle/plug configurations differ. No complete part suffix or geometry inferred.
Documented identification164-position/contact recognition fact in the cited implementation.C261AConnector-family identity is source-backed; exact variant/count remains implementation-specific.C262A
Physical size versus wired lanesAC-HES example: one physical x16 slot has x4 mode and a documented x1 population condition.C261CNot an equivalent field
EvidenceC261A,C261C →
Independent review pending
C262A →
Independent review pending
Read field by field — no sideways scrolling

The same selected records, fields, values and source links as the table. Missing fields remain non-equivalent; no values are merged.

Layer

MCIO / SFF-TA-1016 connector familyP262 / Connector
Connector

Key distinction

PCI Express x16 164-position card-edge connectorP261 / Connector
The x16 mechanical form does not by itself establish PCIe generation, active lane width, power budget or platform support.
MCIO / SFF-TA-1016 connector familyP262 / Connector
MCIO is a connector family, not one universal pin count. Exact lane configuration, cable assembly, host support and protocol must come from the specific implementation.

Nominal contacts

PCI Express x16 164-position card-edge connectorP261 / Connector
164S281Source-backed nominal position/contact count: 164.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Positions / cavity span

PCI Express x16 164-position card-edge connectorP261 / Connector
164 (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.
MCIO / SFF-TA-1016 connector familyP262 / Connector
148 (Claim C262B)S325Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V48 family-level mechanical context only; MCIO circuit count and pinout remain variant-specific and no universal contact map is published.

Populated contacts

PCI Express x16 164-position card-edge connectorP261 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

PCI Express x16 164-position card-edge connectorP261 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact pitch

PCI Express x16 164-position card-edge connectorP261 / Connector
1 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.
MCIO / SFF-TA-1016 connector familyP262 / Connector
0.6 mm Mating-interface pitch; 0.6 mm Source-described pitch / centerline (Claim C262B); 0.6 mm published connector family pitchS325 · S911Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. nominal_identifier; Mini Cool Edge I/O high-speed internal connector family V48 family-level mechanical context only; MCIO circuit count and pinout remain variant-specific and no universal contact map is published. Named series only, not every family part: Molex Mini Cool Edge MCIO family. 38–148circuits; vertical/right-angle/plug configurations differ. No complete part suffix or geometry inferred.

Dimensions / axis

PCI Express x16 164-position card-edge connectorP261 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Connector role

PCI Express x16 164-position card-edge connectorP261 / Connector
card-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.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Coupling / latch

PCI Express x16 164-position card-edge connectorP261 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

PCI Express x16 164-position card-edge connectorP261 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
MCIO / SFF-TA-1016 connector familyP262 / Connector
Anti-slant and anti-reverse contact-protection design; pull-tab optionsS911Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Named series only, not every family part: Molex Mini Cool Edge MCIO family. 38–148circuits; vertical/right-angle/plug configurations differ. No complete part suffix or geometry inferred.

Documented identification

PCI Express x16 164-position card-edge connectorP261 / Connector
164-position/contact recognition fact in the cited implementation.C261A
MCIO / SFF-TA-1016 connector familyP262 / Connector
Connector-family identity is source-backed; exact variant/count remains implementation-specific.C262A

Physical size versus wired lanes

PCI Express x16 164-position card-edge connectorP261 / Connector
AC-HES example: one physical x16 slot has x4 mode and a documented x1 population condition.C261C
MCIO / SFF-TA-1016 connector familyP262 / Connector
Not an equivalent field

Evidence

PCI Express x16 164-position card-edge connectorP261 / Connector
C261A,C261C →
Independent review pending
MCIO / SFF-TA-1016 connector familyP262 / Connector
C262A →
Independent review pending

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Evidence behind this page

Scope first. Source second. Approval separate.

3 linked sources · 3 scoped claims · 0 sources with inspection/access flags.

Page scope: Evidence behind the compared records; the editorial comparison still needs separate review.

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 3 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

S282 · Mini Cool Edge I/O (MCIO) connector system

Molex · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Identifies Mini Cool Edge I/O / MCIO as a multi-variant high-speed internal connector system associated with SFF-TA-1016; V43 preserves variant dependence.

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: MCIO connector-system overview

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 3 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)

C262A · P262

Molex documents Mini Cool Edge I/O (MCIO) as a high-speed internal connector family offered in multiple circuit and lane configurations rather than one universal contact count.

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: S282 · 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.