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Custom system random shutdowns, please help!

Last response: in Systems
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August 10, 2008 5:00:58 PM

I built a custom for gaming a few months back and I'm having an awful time with random shutdowns! When i first assembled the PC, it was less problematic but i still had the occasional shutdown from out of nowhere, instant power off. Here are my system specs

AMD 5200+ @ 2.61ghz (200.9x13) 1000mhzHT - Zalman 9500CNPS heatsink - AS5 Thermal Paste

Foxconn C51XEM2AA 590SLI Mainboard

Antech 650 Earthwatt PSU

Gskill f2-6400CL4-1GBHK 2X1Gb

WD 160gb sata 10,000rpm HD

BFG 7600gt, factory OC to 580mhz

I really don't know what else to do, temp readouts are completely fine!

CPU- 33-35 idle, 50-55 100% load
Mainboard- 40 to 50C
GPU- 50C idle, 60-65C load
Ram - No way to tell, but the heat spreaders do not feel hot.
Nforce Chipset - 50 to 61C

Strange thing also is, i have OC'd to 3012mhz before and the stability is the same as factory!

Anyone have ANY suggestions? my only shot in the dark is maybe the MB is getting to hot @ 45-50C? Also 2 gigs of of RAM memtest well, cpu voltage is stable.
August 10, 2008 8:37:14 PM

Is there any way you can reproduce the problem? I have random restarts but found I can force them if I run Prime95. It does it every time...

Also, if I try to set my CMOS settings to what they should be, things get flakey. Have you found anything like that?

TIm
August 10, 2008 8:45:22 PM

Take it apart and put it back together
sometimes that works great, otherwise sounds like yout power supply might be overheating
August 10, 2008 9:12:53 PM

Go into your bios and check the "PC Health Status" there is a shutdown temperature at the top..set it to 70C.
Also monitor the temps for about 10 minutes...if the cpu climbs above 50C then you might have a seating problem...are you using arctic silver5..that seems to be the best out there right now..and you can't cut corners with heat.
Hope this helps.
!