PC random restarts during games with my new VGA

[REIR0M]

Hi guys,


I've bought a Radeon HD 7850 1GB, I installed the video card and downloaded the last AMD drivers but my PC just restarts when im gaming, its kind of random, it might take 5 minutes to restart or almost an hour.

System specs:

i5 3570
GA-B75M-D3H mobo
2x 4gb ram
1tb HDD
Corsair CX430 (discontinued version, 28A on 12v rail)

This rig is pretty new, and it was working when i was using the onboard video (intel 2500 graphics), but when i installed my new VGA my pc restarts when i play games, but it doesnt restart when im not playing.
Also, i've ran furmark test and my pc restarts in 2-3 minutes with my new vga, but it didnt restart when i did the same furmark test with onboard video.
Temps are fine too, 60-65C when restarted at furmark test with my vga.

I've ran memtest just in case, and everything is okay, i formatted my hdd, but it didnt solve my problem.

So, is my VGA faulty?

Thanks, guys, hope someone can help me, i dont really know what to do now.

 

[Jaydip]

Your PSU new too? also can you check the event logs

Control Panel->Administrative tools->Event logs

 

[Seba]

Temps are fine too, 60-65C when restarted at furmark test with my vga.

This is the GPU temperature or the CPU temperature?

If it is the CPU temperature, you should also check the GPU temperature.