Question Overheating with low temperatures?!?

[Bolas]

I have a strange situation with my build.

Worklog is here:

http://www.xtremesystems.org/forums/showthread.php?288598-Red-Dragon-SFF-build

My computer runs fine for about 10 minutes and shows low temperatures. Like 120 degrees F for the CPU.

Then, without warning, the entire system powers down. Suddenly and unexpectedly.

When I press the power button after this shutdown, it powers up briefly -- lights, fans -- then immediately powers down again.

If I wait a few hours for the system to completely cool down, I can power it up again and it works fine for about a dozen minutes before completely shutting down without warning and refusing to power on again.

I installed a blue screen viewer and found no blue screens at all.

Any idea what could be causing this behavior?

 

[RLGL]

Start with power supply replacement, If it was mine a new setup would be the next move.

 

[Muadib]

I see you are on water. Are you sure your pump is working?