Desktop CPU 12-Volt Power Path: Insufficient supply capacity | Auckland
Pattern to record: Resets occur only during simultaneous CPU and graphics load.
Identify the supply and load
The EPS/CPU connector feeds the motherboard’s processor regulators. Verify the cable against the PSU and board documentation; a PCIe graphics cable is not interchangeable just because a similar plug appears to fit. One possible explanation is that the supply cannot sustain the combined transient demand of installed hardware.
Mains and connector safety
PCIe and CPU power plugs can look similar but are not interchangeable. Headline wattage alone does not prove transient performance.
Workshop checks
- Verify the correct CPU power cable, connector condition and VRM input stability.
- Calculate connector and rail requirements and compare a suitable known supply.
Repair and loaded verification
If the checks support this cause, install a correctly rated quality supply and required cables. Verification should cover cold POST, processor stress, sleep, restart and connector temperature.
For an assessment of your desktop motherboard, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.