I built a PC with the following parts:

• CPU: i5-2500
• Motherboard: Asus P8H67-M EVO rev 3.0
• RAM: G-Skill Ripjaws Series 8GB (2 x 4GB) DDR3 1333
• Video: GTX 560-Ti 1GB
• I used a crappy (but functioning) old case and a 500W Powercooler supply. The rig also includes 3 HDs and a DVD-RW.

Whenever I push the system mildly it resets right away (looks more like power off/power on) and gives me a "CPU over temperature error".

However, BIOS always reports <65ºC for the CPU at the moment of the reset, same as Core Temp and RealTemp. This is RealTemp's log since launching BF3 until the reset (just over 1 minute, as you can see)

Just to be sure I've checked the CPU cooler and re-applied the thermal paste twice, but nothing changed. I'm not overclocking at all.

What am I missing here? Could it be that the old power supply is generating this error? Maybe the mobo isn't reporting temperatures correctly? I don't have a clue on how to troubleshoot this, help

Thanks in advance!