Pc turns off randomly while playing a game!

TheGuyFromWigan

Honorable
Aug 11, 2013
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10,640
Hi everyone
I built my pc just before christmas and i have been having endless problems with it.
To start with i was getting messages from my motherboard claiming that the built in anti surge protection was triggered. This happened every 20 minutes or so, but only when i played games. I have now fixed tis, turns out that it was just overheating so i added a couple more fans and it has been fine since.
Then about a month later i started getting BSOD's every so often. This has stopped now but i dont know why.

My most recent problem is that when i play a game, the pc just turns off and then sticks on the motherboard brand screen (the screen that pops up when you first turn your computer on. I dont know what it is called). The only way i can get back onto windows is to turn it off and then on again (works with everything!).
If i turn it on again straight after the problem has happened, the pc just does the same thing even when it is just the desktop (it has only done this a couple of times though)
I ran windows memory tester and it said everything was fine. CoreTemp says that my cpu is at about 50 degrees celcius when it shuts down.

This problem happens pretty much every time i play a game which is really frustrating!
Any help would be appreciated,
Thanks
 

TheGuyFromWigan

Honorable
Aug 11, 2013
77
0
10,640

MoBo: Asus M5A78L-M LX3
CPU: AMD Fx 6300
GPU: XFX Radeon 7870
Psu: 500w Coolermaster B500
Ram: 4GB Corsair Vengeance
Case: Sharkoon VS3-V

CPU: 20 degrees while idle
GPU: 50-60 while idle