new build randomly turns off

[peterb]

Need helppppp!!! I've build my new Pc:

Asus Maximus formula
Core 2 Duo e8400
Saphirre HD4850
HyperX 2Gb 1066 5-5-5-15
Saegate 500Gb 32Mb Sata2
Powercooler 500w


and it randomly turns off even before booting Windows. Sometimes it turns off when i'm at the bios, sometimes when it's booting and sometimes at windows. I'm thinking it's a mother or PSU problem, waht are your suggestions. Also the CPU temp at the bios is 100°C but i touch the heatsink and it's only warm, one of my case's sensors says it's only 35°C. I've tried changing to the last bios at the asus webpage and it's still happening. Thanks

Check that the CPU heatsink is installed correctly.

[xAmritx]

If ur bios says its 100%..stop trying to turn it on, take hs off. Clean old thermal paste off and start again. If ur using stock cooler did u need to remove any film voeer the thermal pad? I never used a stock cooler before and never paid any attention to the ones that came with my CPUs so assuming here that theres a film covering the exposed side to keep it clean.

[gilljoy]

sounds like the same problem as me, i ended up going and buying an aftermarket heatsink