PCI-SIG PCI Express CEM
PCIe 8-Pin Graphics Power Connector Pinout
The 8-pin PCI Express auxiliary power connector supplies up to 150 W to graphics cards using three +12 V rails and two sense pins. Select a contact to see its role.
Pin assignment
- Power
- Control
- Ground
Schematic face view, not to scale · numbering per PCI-SIG PCI Express CEM
| Pin | Signal | Function | Status |
|---|---|---|---|
| +12V | +12 VDC Graphics Power Rail | Standard | |
| +12V | +12 VDC Graphics Power Rail | Standard | |
| +12V | +12 VDC Graphics Power Rail | Standard | |
| Sense1 | SENSE1: grounded in a 2x4 (8-pin) plug; with SENSE0 also grounded the card may draw up to 150 W | Standard | |
| GND | Ground Return | Standard | |
| Sense0 | SENSE0: grounded in both 2x3 (6-pin) and 2x4 (8-pin) plugs; SENSE0 grounded with SENSE1 open means a 6-pin plug, up to 75 W | Standard | |
| GND | Ground Return | Standard | |
| GND | Ground Return | Standard |
Pin details
Select a pin on the diagram or table for full details.
About this connector
Standard 8-pin PCI Express auxiliary power connector providing three +12 V lines, ground returns, and Sense0/Sense1 configuration detection for 150 W GPU delivery.
Specifications
- Standard
- Molex Mini-Fit Jr. 8-pin (2x4)
- Positions
- 8
Primary sources
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