My computer shuts down when I play games.

robertquenery

Honorable
Sep 1, 2013
9
0
10,510
So I bought this new motherboard (ASUS P5G41T-M LX3) and whenever I play Heroes of Newerth (Highly graphical game) my computer suddenly turns off but the little LED light inside it is turned on and my internet cable plug is blinking, but my fans are not spinning.. I've downloaded the core temp and my computer temperature is about 55-65°C (while playing game) 37-47°C (when just browsing the net) . I also downloaded the GPU Temp and my GPU temperature is about 55°C (when playing) 38-40°C (when just browsing the net), I also tried the torture test (prime95), my computer temperature reached 70°C and nothing happens, it didn't shut down. So, i'm thinking it's not about overheating. I only have 1 fan (the one in the processor) I haven't tried to replace the PSU yet, or adding fans. What seems to be the problem? Any suggestions?

My specs:
Processor: Pentium(R) Dual Core E5700 @ 3.0GHz
Socket 775
Motherboard: ASUS P5G31T-M LX3
GPU: NVIDIA GeForce GT 220 (GeForce 320.29 driver)
RAM: 4gb DDR3
Windows 7-32bit