Problems with M4A78T-E: power twitching when shut down

[tiborrr]

Lately I have some major issues with my workstation. The power, when the computer is shut down, constantly twitches which can be seen as power led turning on and fans spinning up for tenth of a second every two seconds.

- If I plug away the 4-pin ATX12V the damn thing still twitches
- If I plug away every optical and hard disk drive it still twitches
- If I plug away the 24-pin ATX connector the twitching stops

I also have major issues with firing up the PC lately. When It works, it severely overvolts the Vcpu voltage. Up to ~ 0.1V overvoltage. If I needed 1.3375V (BIOS) for 3.6GHz overclock, it now needs 1.2675V BIOS (which in reality is 1.32V).

Is the board dying away? It was abused quite a lot in the past two years. At least three months under -100°C cascade and at least 3-4 10hour full-pull LN2 actions.

Also, I have noticed this after I swapped my Seventeam V-Force 750W non-modular PSU for a modular 650W Z-AF version. Is it possible the that the PSU is causing this? Sadly, at the moment I have no PSU at hand to verify this since I'm away from my benchlab.

System specs:
- AMD Phenom II X4 955 C3
- M4A78T-E
- 4x1GB D9JNL DDR3-1333
- HD6970 2GB PCIE
- 320GB Samsung F3
- DVD-+RW unit SATA
- Seventeam V-Force 650W

Best Regards,
Niko

P.S.: Also, are there any cheap 24/7 AMD990/980GX AM3+ boards on the market in the next month? For overclocking I'll take Crosshair V, I just need something solid for 24/7.

[cdawall]

mine did the same thing when the PSU bit the bullet used to be a damn good clocker then i lost the top PCI-e slot it started doing what yours does and my OC bit the dust 910C2 went from 3.8ghz stable to 3.3ghz stable :/ may have to RMA that board and PSU

[tiborrr]

I'll try with my other Seventeam 750W PSU. Any other ideas? Possibly a dying PWM?

[Smartidiot89]

I would try change the PSU first... If that doesn't work I'd say it's a board issue.

[cdawall]

I'll try with my other Seventeam 750W PSU. Any other ideas? Possibly a dying PWM?

thats what mine was. that being said that was also the same board that i put on DICE and clocked the out of.

[tiborrr]

Problem solved, the PSU was faulty. Replaced and now works great!

[cab]

Asus M4A__ series have a known defect with the power switch, see link below:

http://hardforum.com/showthread.php?t=1567055