New computer turns on for one second then turns off?

[akcorr]

I just built a new computer. Was carefull to everything right. Well went to turn it on for the first time tonight and the power light comes on the fans start spinning then the it just shuts off? Any ideas?

 

[akcorr]

Well I got it to start up but goes down after about 30 seconds.

 

[Alexstarfire]

Sounds like it's overheating. Make sure the HSF to your CPU is seated properly.

 

[PurdueRy]

What did you change to get it to get past 1 second

 

[Noema]

Is the CPU 12VATX cable plugged in?

 

[ken02532]

Try removing EVERYTHING not needed to boot. Leave just one stick of RAM and graphics card. Remove and reseat all other connections. See if it now boots up and stays up. It's possible that your power supply can't handle all your add-on cards and hardware.

 

[akcorr]

- To get by the first part...it was the CPU 12v plug. It wasn't fully plugged in.

- I'll try to removing all that stuff you said and try reconnecting everything when I get home tonight. I hope it's not my power supply. It's a coolermaster 850.

Hardware:

Asus PK3 Deluxe P35 Chipset
2 Gigs of DDR3 1333 Corsais XMS memory
INTEL QX6700 Quad Core
BFG 8800 GTS 320 Megs
Tuniq Tower heatsink - This is what scares me. I felt like it should be tighter but I don't want to go to far down and have the screws touch the motherboard tray. I heard I can short out my MB/CPU that way.
3 default case fans from a Lian Li v1000 aluminum case.

Thats about it....PSU should be able to handle that.

 

[akcorr]

Well after reading the review of the Tuniq Tower here at Anandtech I saw of picture of it mounted on a motherboard and immediately knew what my problem was.

I was so freaked out about having the screws of the heatsink touching the bottom of the motherboard tray that it looks like, compared to the pic in the review, I'm even close to tightening it down to where it's supposed to be. I'll post back here tonight after I make the changes.

 

[fujduong]

That's funny, the same thing started happening to the rig I just built as well.

But I thought the C2D's were very cool cpus, and that they could run for at least for a little while without overheating, even without a heatsink at all.

 

[akcorr]

well the heatsink/thermal paste was the problem. I used the stuff that came with the tuniq tower (ceramic based I think) in the first place and it was hard to spread out across the cpu. I obviously didn't do a good enough job of spreading out the paste.

I cleaned up the heatsink/CPU. Used artic silver instead since it was much easier to spread out. I turned on the CPU I saw temps of 35 degrees celsius. It stayed that way for about 10 min and I've been good for a 48 hours now.

Thanks for everyone's help!