Computer Shuts off after 30 seconds

Recently, I built a new computer from scratch, and I am 99% sure I have everything hooked up to where it should be. Everything is brand new...the motherboard is an ASUS P5N32-SLI Deluxe, and the power supply is an X-Finity 500 Watt ATX power supply. The power supply has the required 8 pin EPS connector since the motherboard is a server motherboard. After connecting everything, the computer will start up fine, and I hit Delete to enter BIOS. After roughly 30 seconds, the computer will shut off all by itself, and I have no idea why. It is plugged in to one of those 2 to 3 prong adapters in a standard outlet...could that be interrupting the power source? Nothing is overheating either (roughly 23 degrees Celsius). My video card is an e-GeForce 6600 LE 256 MB; 2 GB of Corsair ValueSelect DDR2 RAM; 2.8 GHz Pentium D Processor, and finally the case is made by Quantum. Does anybody have any clue why this would be happening? Everything is brand new, and I am 99% sure everything is hooked up in the places it should be. Any help would be soooo much appreciated. Thanks in advance =)

 

If it is shutting down, then I would suspect Processor overheating. The heatsink has compound on it between it and the processor I suspect (not too much, and per specs of the compound manufacturer?).

 

That's a good thought. However, I wouldn't think that compound would be necessary since I bought the processor and heatsink brand new together in a package. I installed a new motherboard in a friend's computer that had an Athlon Sempron processor in it, and it too came with a heatsink. Didn't need any additional compound, and worked fine.

I am pretty sure it had some compound to begin with right out of the package, but I will have to double check. Maybe the Pentium D needs extra since it is such a strong processor?

 

the supplied thermal pad on the heatsink should work just fine. you dont want anymore than is already applied. as far as temps the 23c is something you will most likely never see an intel chip at.double check all temps and recheck to make sure the thumb screws are locked all the way down on the motherboard even 1 screw not fully attached can cause major headaches.

 

If you remove the HS to check for thermal pad or paste, A cleaning & reapply would be in order

Another suspect component would be the PSU.

 

Re: THANK YOU



Thank you to everyone who posted a reply. You have ended my computer building frustration and saved me a lot of hassle with techs.

End result: removed heat sink, and pushed really really firmly to secure it (there's a click that occurs that I didn't know about unless you really push the thing in there).

It was as simple as that, so again to everyone who said processor/heatsink...THANK YOU!!!