FIELD GUIDESource-led reference
Port & Cable

Side by side

8-pin CPU power versus 8-pin PCIe auxiliary power

What does the PSU cable and motherboard/GPU manual call this connector? Pin count alone is not enough.

Computer-generated illustration, not a photograph.
P190 · Connector8-pin +12 V CPU power connector (EPS12V form)
Computer-generated illustration, not a photograph.
P192 · ConnectorPCIe 8-pin auxiliary power connector

How they differ

CPU/EPS and PCIe auxiliary-power families can share a nominal count while serving different documented roles.

  • CORSAIR’s cited EPS cable example uses a different split arrangement from its PCIe example. The split is an example, not a universal recognition rule. S474 · S474
  • A motherboard can have a PCIe-power input as well as processor power; board location does not identify the connector family. S560
  • The board header and cable-plug harness are different objects; do not mirror a logical assignment table into a physical face map. S561

What this comparison does not establish: Check exact modular PSU cable type: incorrect substitutions can damage hardware. S489 · S489

Choose the next check

Match the exact PSU model/cable family with the motherboard or add-in-card connector specified in its manual.

Report a comparison correction →

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
Field8-pin +12 V CPU power connector (EPS12V form)PCIe 8-pin auxiliary power connector
TypeConnectorConnector
FamilyPC powerPC power
Shapedual rowdual row
Nominal contacts8S198Documented position count only; V36 does not publish the electrical assignment.8S199Documented position count only; no V36 electrical pin map.
Positions / cavity span8 (Claim C190E)S560Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. The documented configurations are examples; connector count alone does not determine an unknown motherboard’s requirements.8 (Claim C192C)S474Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Do not infer cable role solely from the equipment category or position count.
Contact rows2 (Source-described array; C190A); 2 (Molex39-01-2080)S198 · S977 · S760Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof. Exact Molex39-01-2080 receptacle housing named in SSI PSDG2008v1.2.1 section4.2.2, component geometry only. Quantity context: Manufacturer Number of Rows / SSI2x4 array.2 (Source-described array; C192A); 2 (Source-described array; C192B); 2 (Source-described array; C192E)S199 · S216 · S561Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof. V37 engineering-depth sidecar fact; source-checked but not independently human-approved, not a fabrication drawing, and not a safe-substitution or repair instruction. Printed page 59 only. The guide-specific connection description is not a PSU-side socket assignment or permission to reuse an unknown cable.
Connector roleplug; headerS198 · S215Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. processor-power cable plug / motherboard header interfaceplug; headerS199 · S216Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. PCIe auxiliary-power cable plug / add-in-card header interface
Key distinctionAn eight-position PC power shell can be confused with PCIe auxiliary power; keying and device documentation matter.This eight-position PC power form is not interchangeable with every 8-pin CPU-power connector.

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: PC power

T08 · Document the actual path

GPU versus CPU auxiliary power

Do not select a CPU/EPS or GPU/PCIe power cable by count, location or a similar shell. Use the exact PSU/cable type and motherboard/GPU documentation; unresolved cable identity or review scope is a stop.

Read three exact-equipment examples →

What does the exact equipment documentation establish?

Unknown is a useful answer. Yes means you have the relevant model/port/product statement; it does not mean this site verified your equipment.

Read the connector designation in the motherboard or GPU manual. A motherboard may also have a PCIe-power input.

Use the PSU maker’s model/cable compatibility documentation; incorrect modular cable types can damage hardware. Do not trial-fit.

Check the actual part/revision evidence. P260 cable-housing illustrations do not prove the revised header’s contact lengths or marking.

Stop before any power connection.

  • Keep this power path disconnected. Obtain exact manufacturer support and qualified technical review; declarations here do not clear the unresolved review gate.
  • Read the connector designation in the motherboard or GPU manual. A motherboard may also have a PCIe-power input.
  • Use the PSU maker’s model/cable compatibility documentation; incorrect modular cable types can damage hardware. Do not trial-fit.
  • Check the actual part/revision evidence. P260 cable-housing illustrations do not prove the revised header’s contact lengths or marking.

Documentation declarations only; no physical test, negotiated mode, delivered power, safe mating, pinout or compatibility approval. 3 missing prerequisites; 0 recorded conflicts.

Read the scoped power distinction →

No pinout/wiring or installation instructions. Independent qualified technical review remains unresolved in this candidate.

Source scope and original inspection information
  • S280 · Micro-Fit+ PCIe CEM5 12V-2x6 header

    Part details and PCIe CEM5 12V2x6 product specification · Revision not recorded · Recorded source inspection 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.

  • S474 · Which PSU cables go where? — EPS and PCIe sections

    4-pin ATX12V / 8-pin EPS12V and 6-pin / 6+2-pin PCIe sections. Text inspected; linked product images could not be retrieved. · Revision not recorded · Recorded source inspection 2026-10-11. Only the exact named source/example supports the observation. No universal mating, wiring, maximum rating or mechanical tolerance is inferred. Not identified; retrieval is not a revision date.

  • S489 · PSU cable compatibility — Type 3/4 versus Type 5 warning

    Disclaimer item 3; cable-type headings. The model chart icon cells are not interpreted. · Revision not recorded · Recorded source inspection 2026-10-11. Exact source and example only; no device approval, universal rating, wiring or manufacturing tolerance is inferred. Remote raw-file retention is reported separately.

  • S560 · CORSAIR power-cable guide — required inputs and connector location

    4-pin ATX12V / 8-pin EPS12V and 6-pin / 6+2-pin PCIe sections; accompanying physical images were not visually inspectable. · Revision not recorded · Recorded source inspection 2026-10-12. No independent review, wiring, current rating, mating or fabrication approval. Retrieval status and document revision retained.

  • S561 · Intel ATX12VO Design Guide revision 2.11 — role and generation boundaries

    Revision 2.11 / May 2024. Printed pages 17, 58, 59 and 63 visually inspected; page 63 special note compares 12V-2x6 and earlier 12VHPWR. · Revision not recorded · Recorded source inspection 2026-10-12. No independent review, wiring, current rating, mating or fabrication approval. Retrieval status and document revision retained.

Three exact-equipment examples

These are source-backed documentation cases. They do not select your equipment, fill the form above, or report a hardware test.

T08-S1 · Supported within the stated documentation scope

An EPS cable and the board’s CPU power role

Document the designated Type 4 EPS cable role for this motherboard power input.

motherboard ATX_12V power input
ASUS PRIME B550-PLUS AC-HES — selected storage and PCIe slots M05-29
Type 4 modular PSU
Corsair RM1000x ATX 3.1 (2024) M05-31
Type 4 EPS12V CPU cable
Corsair CP-8920141 M05-30
Keep these conditions
  • The PSU is specifically the2024 RM1000x ATX3.1 version, not another RM1000x revision.
  • This resolves cable role and published PSU family only; full system load, connector condition and installation remain separate.
  • ASUS identifies an8-pin+12V motherboard power input. Corsair identifies CP-8920141 as Type4 EPS12V and the2024 RMx family as Type4 with separate EPS and PCIe cable classes. M05-29 · M05-30 · M05-31

Supported within the stated documentation scope: The documented EPS role and named PSU cable family align for this bounded identification question. A fully powered system has not been assessed or tested.

Next check: Keep the PSU SKU/revision and exact cable identification with the motherboard manual; follow their installation instructions.

Documentation scope only. This is not a hardware test, detected device state, pinout, electrical replacement approval or guarantee for another product/revision.

Exact source scopes and inspection dates
  • M05-29 · PRIME B550-PLUS AC-HES user manual

    PDF p.8 internal power connectors; pp.12-13 section 1.2.1 item5 Power connectors, ATX_12V board label · E18712 first edition July 2021 · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

  • M05-31 · RMx ATX 3.1 2024 cable compatibility

    Which cable type; RM1000x cables: Type4, EPS4+4, PCIe6+2 and native12V-2x6 are distinct; compatible cables only · No document revision shown on inspected page · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

  • M05-30 · PSU spare parts

    Stock Type 4 cables table: CP-8920141 EPS12V versus CP-8920143 PCIe pigtail; exact PSU pinout type required · No document revision shown on inspected page · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

Report a correction to this example →

T08-S2 · The proposed path disagrees with the documentation

PCIe6+2 and EPS4+4 labels are different roles

Treat a Type 4 PCIe pigtail cable as the board’s EPS power cable.

motherboard ATX_12V power input
ASUS PRIME B550-PLUS AC-HES — selected storage and PCIe slots M05-29
Type 4 modular PSU
Corsair RM1000x ATX 3.1 (2024) M05-31
Type 4 PCIe pigtail cable
Corsair CP-8920143 M05-30
Keep these conditions
  • The candidate is CP-8920143, not CP-8920141.
  • Corsair lists CP-8920143 as PCIe and CP-8920141 as EPS12V; the RM1000x documentation keeps EPS4+4 and PCIe6+2 cable classes separate. M05-30 · M05-31
  • The ASUS board identifies its motherboard+12V power connector separately from expansion-card interfaces. M05-29

The proposed path disagrees with the documentation: The proposed cable’s documented role disagrees with the motherboard power role. A shared eight-contact total is not interchangeability evidence.

Next check: Use the exact PSU and component documentation to identify the designated cable; do not force or repin a cable from an outline comparison.

Documentation scope only. This is not a hardware test, detected device state, pinout, electrical replacement approval or guarantee for another product/revision.

Exact source scopes and inspection dates
  • M05-29 · PRIME B550-PLUS AC-HES user manual

    PDF p.8 internal power connectors; pp.12-13 section 1.2.1 item5 Power connectors, ATX_12V board label · E18712 first edition July 2021 · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

  • M05-31 · RMx ATX 3.1 2024 cable compatibility

    Which cable type; RM1000x cables: Type4, EPS4+4, PCIe6+2 and native12V-2x6 are distinct; compatible cables only · No document revision shown on inspected page · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

  • M05-30 · PSU spare parts

    Stock Type 4 cables table: CP-8920141 EPS12V versus CP-8920143 PCIe pigtail; exact PSU pinout type required · No document revision shown on inspected page · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

Report a correction to this example →

T08-S3 · Specific information is still missing

A named cable still needs the exact PSU model

Decide whether a loose CP-8920141 cable belongs to an unidentified modular PSU.

motherboard ATX_12V power input
ASUS PRIME B550-PLUS AC-HES — selected storage and PCIe slots M05-29
Type 4 EPS12V CPU cable
Corsair CP-8920141 M05-30
Keep these conditions
  • The cable and motherboard are named; the PSU maker, SKU and revision are missing.
  • Corsair scopes CP-8920141 to its Type4 pinout PSUs; the2024 RMx article requires compatible cables and distinguishes them from other types. M05-30 · M05-31

Specific information is still missing: The motherboard end does not determine the PSU-side pinout. Without the actual PSU identity, the cable-family match remains unresolved.

Still needed:

  • PSU maker, model/SKU and revision
  • Manufacturer-confirmed PSU-side cable family

Next check: Identify the PSU label and consult its maker’s exact cable compatibility record before considering any connection.

Documentation scope only. This is not a hardware test, detected device state, pinout, electrical replacement approval or guarantee for another product/revision.

Exact source scopes and inspection dates
  • M05-29 · PRIME B550-PLUS AC-HES user manual

    PDF p.8 internal power connectors; pp.12-13 section 1.2.1 item5 Power connectors, ATX_12V board label · E18712 first edition July 2021 · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

  • M05-30 · PSU spare parts

    Stock Type 4 cables table: CP-8920141 EPS12V versus CP-8920143 PCIe pigtail; exact PSU pinout type required · No document revision shown on inspected page · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

  • M05-31 · RMx ATX 3.1 2024 cable compatibility

    Which cable type; RM1000x cables: Type4, EPS4+4, PCIe6+2 and native12V-2x6 are distinct; compatible cables only · No document revision shown on inspected page · Inspected 2026-10-22. Selected exact-model documentation only; no hardware test or broader family approval.

Report a correction to this example →
Report a correction to this task →

Matching diagram / concept only

Identify both cable ends.

Component role does not settle modular PSU compatibility.

Separate CPU/PCIe component roles and exact PSU cable-type check. No cavity geometry.
Component role does not settle modular PSU compatibility. Concept diagram, not physical geometry or a connection approval.
EPS12V / CPU power →PCIe 8-pin auxiliary →

Not a hardware compatibility verdict. S198 · S474 · S489 · S199

The reference ledger

Read the same question across.

2 selected records · 13 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
EPS12V / CPU: Two equally sized labelled groups: 4 + 4. Concept diagram only; no physical connector geometry is depicted.
P190 / Connector8-pin +12 V CPU power connector (EPS12V form)

Identification schematic · not to scale · drawing review pending

PCIe / auxiliary: A larger group of 6 beside a smaller group of 2. Concept diagram only; no physical connector geometry is depicted.
P192 / ConnectorPCIe 8-pin auxiliary power connector

Identification schematic · not to scale · drawing review pending

LayerConnectorConnector
Key distinctionAn eight-position PC power shell can be confused with PCIe auxiliary power; keying and device documentation matter.This eight-position PC power form is not interchangeable with every 8-pin CPU-power connector.
Nominal contacts8S198Documented position count only; V36 does not publish the electrical assignment.8S199Documented position count only; no V36 electrical pin map.
Positions / cavity span8 (Claim C190E)S560Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. The documented configurations are examples; connector count alone does not determine an unknown motherboard’s requirements.8 (Claim C192C)S474Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Do not infer cable role solely from the equipment category or position count.
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 rows2 (Source-described array; C190A); 2 (Molex39-01-2080)S198 · S977 · S760Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof. Exact Molex39-01-2080 receptacle housing named in SSI PSDG2008v1.2.1 section4.2.2, component geometry only. Quantity context: Manufacturer Number of Rows / SSI2x4 array.2 (Source-described array; C192A); 2 (Source-described array; C192B); 2 (Source-described array; C192E)S199 · S216 · S561Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof. V37 engineering-depth sidecar fact; source-checked but not independently human-approved, not a fabrication drawing, and not a safe-substitution or repair instruction. Printed page 59 only. The guide-specific connection description is not a PSU-side socket assignment or permission to reuse an unknown cable.
Contact pitch4.2 mm Manufacturer Pitch Mating Interface (Molex39-01-2080)S977 · S760Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact Molex39-01-2080 receptacle housing named in SSI PSDG2008v1.2.1 section4.2.2, component geometry only.4.2 mm manufacturer-reported centerline or mating-interface pitch (NVIDIA GRID K2 eight-pin PCIe power header)S765Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example NVIDIA GRID K2 eight-pin PCIe power header: Device-specific board header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Named2013board example only. Do not treat as every modernGPUheader geometry or modularPSU pinout.
Dimensions / axisNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.18 ± 0.25 mm housing width (NVIDIA GRID K2 eight-pin PCIe power header); 11.4 ± 0.25 mm housing height (NVIDIA GRID K2 eight-pin PCIe power header); 18.1 ± 0.25 mm front-to-rear overall connector extent including formed PCB tails (NVIDIA GRID K2 eight-pin PCIe power header)S765Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example NVIDIA GRID K2 eight-pin PCIe power header: Device-specific board header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Named2013board example only. Do not treat as every modernGPUheader geometry or modularPSU pinout.
Connector roleplug; headerS198 · S215Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. processor-power cable plug / motherboard header interfaceplug; headerS199 · S216Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. PCIe auxiliary-power cable plug / add-in-card header interface
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 / polarizationsquare and chamfered cavities shown with latch above; exact pattern belongs to this board drawing, not a universal EPS/PCIe interchange rule (MSI B550-A PRO CPU_PWR1)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO CPU_PWR1: Device-specific eight-position CPU power header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. MSI is board vendor; connector OEM/series/pitch remain unknown. Do not import unrelated Molex8-position housing as an EPS equivalent.position1indicator and alignment rib shown in Figure7 (NVIDIA GRID K2 eight-pin PCIe power header)S765Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example NVIDIA GRID K2 eight-pin PCIe power header: Device-specific board header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Named2013board example only. Do not treat as every modernGPUheader geometry or modularPSU pinout.
Documented identification8-position 2x4 +12 V processor-power form.C190A8-position 2x4 PCIe auxiliary-power form.C192A
EvidenceC190A,C190C,C190D,C190E,C190W →
Independent review pending		C192A,C192C,C192D,C192E,C192F →
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

PCIe 8-pin auxiliary power connectorP192 / Connector
Connector

Key distinction

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
An eight-position PC power shell can be confused with PCIe auxiliary power; keying and device documentation matter.
PCIe 8-pin auxiliary power connectorP192 / Connector
This eight-position PC power form is not interchangeable with every 8-pin CPU-power connector.

Nominal contacts

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
8S198Documented position count only; V36 does not publish the electrical assignment.
PCIe 8-pin auxiliary power connectorP192 / Connector
8S199Documented position count only; no V36 electrical pin map.

Positions / cavity span

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
8 (Claim C190E)S560Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. The documented configurations are examples; connector count alone does not determine an unknown motherboard’s requirements.
PCIe 8-pin auxiliary power connectorP192 / Connector
8 (Claim C192C)S474Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Do not infer cable role solely from the equipment category or position count.

Populated contacts

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
PCIe 8-pin auxiliary power connectorP192 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
2 (Source-described array; C190A); 2 (Molex39-01-2080)S198 · S977 · S760Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof. Exact Molex39-01-2080 receptacle housing named in SSI PSDG2008v1.2.1 section4.2.2, component geometry only. Quantity context: Manufacturer Number of Rows / SSI2x4 array.
PCIe 8-pin auxiliary power connectorP192 / Connector
2 (Source-described array; C192A); 2 (Source-described array; C192B); 2 (Source-described array; C192E)S199 · S216 · S561Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof. V37 engineering-depth sidecar fact; source-checked but not independently human-approved, not a fabrication drawing, and not a safe-substitution or repair instruction. Printed page 59 only. The guide-specific connection description is not a PSU-side socket assignment or permission to reuse an unknown cable.

Contact pitch

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
4.2 mm Manufacturer Pitch Mating Interface (Molex39-01-2080)S977 · S760Current primary-source scoped values; named examples remain separate and unknowns are not inferred from illustrations. Exact Molex39-01-2080 receptacle housing named in SSI PSDG2008v1.2.1 section4.2.2, component geometry only.
PCIe 8-pin auxiliary power connectorP192 / Connector
4.2 mm manufacturer-reported centerline or mating-interface pitch (NVIDIA GRID K2 eight-pin PCIe power header)S765Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example NVIDIA GRID K2 eight-pin PCIe power header: Device-specific board header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Named2013board example only. Do not treat as every modernGPUheader geometry or modularPSU pinout.

Dimensions / axis

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
PCIe 8-pin auxiliary power connectorP192 / Connector
18 ± 0.25 mm housing width (NVIDIA GRID K2 eight-pin PCIe power header); 11.4 ± 0.25 mm housing height (NVIDIA GRID K2 eight-pin PCIe power header); 18.1 ± 0.25 mm front-to-rear overall connector extent including formed PCB tails (NVIDIA GRID K2 eight-pin PCIe power header)S765Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example NVIDIA GRID K2 eight-pin PCIe power header: Device-specific board header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Named2013board example only. Do not treat as every modernGPUheader geometry or modularPSU pinout.

Connector role

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
plug; headerS198 · S215Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. processor-power cable plug / motherboard header interface
PCIe 8-pin auxiliary power connectorP192 / Connector
plug; headerS199 · S216Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. PCIe auxiliary-power cable plug / add-in-card header interface

Coupling / latch

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
PCIe 8-pin auxiliary power connectorP192 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
square and chamfered cavities shown with latch above; exact pattern belongs to this board drawing, not a universal EPS/PCIe interchange rule (MSI B550-A PRO CPU_PWR1)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO CPU_PWR1: Device-specific eight-position CPU power header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. MSI is board vendor; connector OEM/series/pitch remain unknown. Do not import unrelated Molex8-position housing as an EPS equivalent.
PCIe 8-pin auxiliary power connectorP192 / Connector
position1indicator and alignment rib shown in Figure7 (NVIDIA GRID K2 eight-pin PCIe power header)S765Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example NVIDIA GRID K2 eight-pin PCIe power header: Device-specific board header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Named2013board example only. Do not treat as every modernGPUheader geometry or modularPSU pinout.

Documented identification

8-pin +12 V CPU power connector (EPS12V form)P190 / Connector
8-position 2x4 +12 V processor-power form.C190A
PCIe 8-pin auxiliary power connectorP192 / Connector
8-position 2x4 PCIe auxiliary-power form.C192A

Evidence

Your next step

Use the distinction in context.

Open the field notes Read source-linked facts and limitations.Compare another pair Start from a common confusion.Check a connection A comparison is not a compatibility verdict.

Continue the distinction

Compare next

Browse every comparison →
Legacy PCIe auxiliary power versus 12VHPWRIs this the older 2x3/2x4 family or the separate 12+4-contact 12VHPWR form?PCIe 8-pin, 12VHPWR and 12V-2x6 auxiliary powerWhich exact GPU auxiliary-power connector family does the PSU and device documentation require? Connector-family identity is only the first layer; implementation-specific electrical and protocol requirements still need exact documentation.BNC vs TNC coaxial connectorsBNC uses bayonet coupling while TNC uses threaded coupling. Connector family, impedance and application still need to be verified independently.DisplayPort connector vs DisplayPort 2.1The full-size DisplayPort connector does not identify the implemented DisplayPort generation, link rate or optional features.DisplayPort vs Mini DisplayPortFull-size DisplayPort and Mini DisplayPort are different physical forms. Mini DisplayPort shape also appeared on Thunderbolt 1/2 products, so function still needs device evidence.DVI-D dual-link vs DVI-I dual-linkDVI-D and DVI-I use related shells but have different contact arrangements. The analog-contact area is a key physical distinction.

Adjust this comparison

Evidence behind this page

Scope first. Source second. Approval separate.

8 linked sources · 10 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 2027-01-03. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 8 source scopes, access limits and dates

S198 · ATX Version 3.0 — +12 V Power Connector

Intel · Manufacturer / product-owner domain · inspected 2026-10-05 · due 2027-01-03

Within inspection window

Scoped support: Documents 4-pin and 8-pin +12 V processor power connector forms; V36 uses only the 8-pin form for identification.

Not established / limitations: Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.

Locator: +12 V CPU power connector section

S199 · ATX Version 3.0 — PCI Express add-in card connectors

Intel · Manufacturer / product-owner domain · inspected 2026-10-05 · due 2027-01-03

Within inspection window

Scoped support: Identifies legacy 2x3 and 2x4 PCIe auxiliary-power forms and the 12VHPWR form with twelve larger power contacts plus four smaller sideband contacts.

Not established / limitations: Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.

Locator: PCIe auxiliary power connector section

S474 · Which PSU cables go where? — EPS and PCIe sections

CORSAIR · Unclassified publisher domain · inspected 2026-10-11 · due 2027-01-09

Within inspection window

Scoped support: Split-cable examples and CPU/PCIe role distinction only. No physical mating-face art is authorized by this text inspection.

Not established / limitations: Only the exact named source/example supports the observation. No universal mating, wiring, maximum rating or mechanical tolerance is inferred. Not identified; retrieval is not a revision date.

Locator: 4-pin ATX12V / 8-pin EPS12V and 6-pin / 6+2-pin PCIe sections. Text inspected; linked product images could not be retrieved.

S489 · PSU cable compatibility — Type 3/4 versus Type 5 warning

CORSAIR · Unclassified publisher domain · inspected 2026-10-11 · due 2027-01-09

Within inspection window

Scoped support: CORSAIR modular PSU cable types only; not cross-brand compatibility.

Not established / limitations: Exact source and example only; no device approval, universal rating, wiring or manufacturing tolerance is inferred. Remote raw-file retention is reported separately.

Locator: Disclaimer item 3; cable-type headings. The model chart icon cells are not interpreted.

S560 · CORSAIR power-cable guide — required inputs and connector location

CORSAIR · Unclassified publisher domain · inspected 2026-10-12 · due 2027-01-10

Within inspection window

Scoped support: Equipment-side roles and the instruction to consult the motherboard manual. The article includes motherboard PCIe-power examples. Its images do not qualify as inspected physical specimens here.

Not established / limitations: No independent review, wiring, current rating, mating or fabrication approval. Retrieval status and document revision retained.

Locator: 4-pin ATX12V / 8-pin EPS12V and 6-pin / 6+2-pin PCIe sections; accompanying physical images were not visually inspectable.

S561 · Intel ATX12VO Design Guide revision 2.11 — role and generation boundaries

Intel · Manufacturer / product-owner domain · inspected 2026-10-12 · due 2027-01-10

Within inspection window

Scoped support: This specified guide revision only. It separates PCB headers from cable plugs and describes changed PCB-header contact lengths. No pinout, dimensions, sensing circuit, power rating or fit approval is imported.

Not established / limitations: No independent review, wiring, current rating, mating or fabrication approval. Retrieval status and document revision retained.

Locator: Revision 2.11 / May 2024. Printed pages 17, 58, 59 and 63 visually inspected; page 63 special note compares 12V-2x6 and earlier 12VHPWR.

S760 · Power Supply Design Guideline for 2008 Dual-Socket Servers and Workstations (A Server System Infrastructure Specification)

SSI Forum (archive hosted by SNIA) · Standards-organization domain · inspected 2026-10-20 · due 2027-01-18

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: Section 4.2.1, Table 3 P1 Baseboard Power Connector, printed p. 10; Section 4.2.2, Table 4 Processor 0 / memory power Connector, printed p. 12; Section 4.2.2, Table 5 Processor 1 / memory power Connector, printed p. 12; Section 4.2.4, Table 7 Peripheral Power Connectors (Amp 1-480424-0), printed p. 13; Section 4.2.5, Table 8 Floppy Power Connector (Amp 171822-4), printed p. 13; Section 4.2.8, Table 11 PCI Express Graphic Card Power Connector(s), printed p. 15

S977 · Molex39-01-2080/39012080 receptacle housing physical specifications

Molex · Manufacturer / product-owner domain · inspected 2026-10-22 · due 2027-01-20

Within inspection window

Scoped support: Exact housing binding to SSI processor/memory power connectors.

Not established / limitations: Empty housing is not assembled EPS harness. No loaded contacts, cable wiring, PSU-side shape, generic Mini-Fit key pattern or power compatibility established; live page says Limited Information Available.

Locator: Physical Specifications: Number Of Rows2; Pitch Mating Interface4.20mm; Keywords39-01-2080/0039012080. SSI S760 section4.2.2 PDF/printedp12 explicitly names this eight-position housing and2x4 processor/memory connectors; full PDF text and150dpi page pixels inspected.

Trace 10 claims to their source records

C190A · P190

Intel documents an 8-pin / 2x4 +12 V processor-power connector form in the cited ATX design guide.

Claim scope: V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.

Source links: S198 · Evidence trail → (private workspace)

C190C · P190

CORSAIR illustrates the CPU-power cable role with an EPS12V 4+4 arrangement; the split is an example, not a requirement for every EPS cable.

Claim scope: Cable-division concept only; exact face geometry was not inspected.

Source links: S474 · Evidence trail → (private workspace)

C190D · P190

CORSAIR warns that Type 3 and Type 4 modular PSU cables are not compatible with Type 5 power supplies.

Claim scope: This separate PSU-end check is not resolved by identifying an EPS12V component-end connector.

Source links: S489 · Evidence trail → (private workspace)

C190E · P190

CORSAIR describes more than one processor-power input arrangement and directs the reader to the motherboard manual to determine whether both eight-position CPU inputs are required.

Claim scope: The documented configurations are examples; connector count alone does not determine an unknown motherboard’s requirements.

Source links: S560 · Evidence trail → (private workspace)

C190W · P190

SSI names Molex 39-01-2080 for its eight-position 2 × 4 processor/memory power connector. The exact Molex housing specification lists two rows and 4.20 mm mating-interface pitch.

Claim scope: Exact Molex39-01-2080 receptacle housing named in SSI PSDG2008v1.2.1 section4.2.2, component geometry only.

Source links: S977 · S760 · Evidence trail → (private workspace)

C192A · P192

Intel documents a 2x4 PCIe add-in-card auxiliary-power connector form in the cited ATX design guide.

Claim scope: V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.

Source links: S199 · Evidence trail → (private workspace)

C192C · P192

CORSAIR describes the eight-position PCIe cable end as a 6+2 arrangement and distinguishes it from EPS12V; some motherboards also use PCIe power connectors.

Claim scope: Do not infer cable role solely from the equipment category or position count.

Source links: S474 · Evidence trail → (private workspace)

C192D · P192

CORSAIR warns that using the incorrect modular PSU cable type may damage hardware and requires cable-type verification before installation.

Claim scope: The component-end PCIe role is separate from exact CORSAIR PSU cable compatibility; no cross-brand pinout is inferred.

Source links: S489 · Evidence trail → (private workspace)

C192E · P192

Intel revision 2.11 describes the PCIe 2x4 connection as a board header and a separate cable-plug harness; these are different component roles.

Claim scope: Printed page 59 only. The guide-specific connection description is not a PSU-side socket assignment or permission to reuse an unknown cable.

Source links: S561 · Evidence trail → (private workspace)

C192F · P192

CORSAIR documents PCIe-power inputs on some motherboards as well as graphics cards; mounting on a motherboard does not by itself identify an EPS12V input.

Claim scope: The final clause is an identification inference from the explicit counterexample, not a claim about every motherboard.

Source links: S560 · 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.