ATX 8-pin EPS Pinout
8-pin EPS12V connector delivering dedicated +12 V power to the CPU VRM.
Overview
The 8-pin EPS12V connector supplies dedicated +12 V to the processor voltage regulator. It is two rows of four: four ground and four +12 V contacts.
EPS keying places the +12 V row nearest the latch. Many cables are 4+4 splittable for older 4-pin sockets. The keying differs from the similar PCIe 8-pin to prevent cross-plugging.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | COM | GND | Ground |
| 2 | COM | GND | Ground |
| 3 | COM | GND | Ground |
| 4 | COM | GND | Ground |
| 5 | +12V | SIGNAL | +12 V to CPU VRM |
| 6 | +12V | SIGNAL | +12 V to CPU VRM |
| 7 | +12V | SIGNAL | +12 V to CPU VRM |
| 8 | +12V | SIGNAL | +12 V to CPU VRM |
Notes
- Pins 1-4 ground, pins 5-8 +12 V (the +12 V row sits next to the clip).
- Keyed differently from PCIe 8-pin - do NOT force a PCIe cable into the EPS socket.
- Often a 4+4 splittable connector for backward compatibility.
Reference: Intel EPS12V Power Supply Design Guide· verified 2026-06-27