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I just finished assembling a PC, and now I'm having some trouble getting it started up. First off, when I boot it up, it starts for a few seconds, fans start whirring and lights go on, and then between 10 and 40 seconds later, it shuts off. I'd tell you what it says on the monitor, but that's the other problem: nothing gets shown on the monitor. The monitor light is green, so I know that works, and I've tried 3 different ones that all work fine elsewhere. I've also tried two different PSU's, but that doesn't help either.

Here's the relevant parts:
Motherboard
Processor
PSU that I'm using primarily

Probably isn't a heating problem, since I have the case open and I can barely feel any heat when I stick my head in there for the 10 seconds or so. Fans aren't being blocked either. Any ideas?
 

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there are usually not enough amps on the 12v line on this supply,check your power requirements here
http://www.jscustompcs.com/power_supply/
based on a quality supply and add 30% to the result
post details instead of odd links,we need to know exactly what you have in the box
check your cpu is seated properly with the correct application of thermal compound
http://www.arcticsilver.com/arctic_silver_instructions.htm
check for a short by setting it up out of the case with
cpu
video
ram
if it is a short it usually turns straight off,that's why i would suspect the cpu first,then power
 
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