Sounds like you built this puppy.
1) Does it use metal standoff's to hold the motherboard up off the Support Plate? (Standoff is metal, Spacer is plastic)
Do the standoff's match EVERY mounting hole in the motherboard?
To wit, there isn't a standoff sitting on the support plate, that doesn't match up to a mounting hole in the motherboard?
If there is a standoff in the wrong spot, it could be shorting against the exposed solder joints on the bottom of the motherboard.
2) is the 4-pin +12 volt power cable from the Power Supply plugged into the motherboard?
http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4[ Two Yellow 12 Volt wires, two Black Ground wires ]
3) Thermal paste applied, and properly? AMD processors don't play when it comes to heat. If they reach the thermal limit, (Like any Processor), they turn off, BUT, an AMD will turn off in a heartbeat.
Heatsink sitting flat on the top of the Processor's case? I use a 'birds-eye' view with the mobo out, and look across the side. (Sides, ends)
4) Zalman fan doing it's thing? Spinning?
Spinning all the time, no intermediate spinning of spinning a few times, and stop?
Spinning at the proper RPM?
5) Patriot ram seated well? Locks are in tight?
Didn't get bumped when you were hooking up power cables?
Remove/re-seat. Only takes a few minutes, and will help you sleep better tonight.
(Both of those ram memory modules in the same channel?)
6) Power Supply known to be good?
What is with the 40GB Seagate harddrive? Typo, and meant 400GB?
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