PCIe 6-pin Pinout
Supplemental 75 W +12 V graphics-card power connector defined by the PCI-SIG PCIe spec.
Overview
The PCIe 6-pin (PEG) connector supplies up to 75 W of additional +12 V power to graphics cards beyond the slot's 75 W. It is two rows of three: typically three +12 V and three returns, one return acting as a sense/detect line.
In the common implementation pins 1-3 carry +12 V and pins 4-6 are ground; one ground is the sense return the card checks for '75 W present' detection. 6+2 connectors extend this for 8-pin 150 W cards.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | +12V | POWER | +12 V supply |
| 2 | +12V | POWER | +12 V supply (sometimes NC/sense on the card side) |
| 3 | +12V | POWER | +12 V supply |
| 4 | Sense / COM | GND | Ground also used as presence-detect/sense return |
| 5 | COM | GND | Ground |
| 6 | COM | GND | Ground |
Notes
- Rated 75 W (6.25 A on +12 V). The card uses a sense pin to verify the connector is seated.
- 6+2 cables combine to form the 150 W 8-pin connector.
- Pin-number conventions vary slightly between sources (PCI-SIG spec is paywalled).
Reference: PCI-SIG PCI Express Graphics 150 W-ATX Specification· verified 2026-06-27