Have you looked for bloated capacitors in the power supply?
I'll check see no need though, The system has been stable since 02-13-2012, 06:52 PM
My pc
CPU : AMD PHENOM II x4 @ 3.5Ghz
MB : ASUS M4A89TD PRO USB3
RAM : Kingston ValueRAM 16gb DDR3
PSU : Cooler Master 850W Silent Pro
GPU : ATI Radeon HD 6850
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