Gaming crashes my new pc

Subz305

Honorable
Jul 19, 2013
12
0
10,510
When i run games they crash after about a few minutes. The whole computer just restarts. I am running dual monitors while running gpuz and coretemp to see if temps may be a problem. They are not. Is this most likely a power supply problem?

The main parts of my rig are as follows.

Asus Z87 PRO mobo
Intel Haswell 4770k
Galaxy 780 HOF
XFX 850 PRO black edition psu
Kingston Hyperx 2400
 
Solution
It does sound like the power supply, try running with just the onboard graphics with the 780 removed, if it runs OK its likely the power supply but it could be the 780.