Power supply problem?

salerhino

Reputable
Mar 16, 2016
1,263
0
5,660
Hello community of Tom's hardware!
I am begging for your help!
I got new used PC with these specs:
Intel i7-920
Sapphire HD7870 GHz edition (Dual-X fans)
MSI X58 Platinum
4GB Kingston RAM 1333MHz (which works on lower clock it seems)
400 W Chieftec PSU (14A and 15A on 12V1 i 12V2 and exact model is:GPS-400AA-101 A)

So, problem is that my PC runs fine in browsing net, watching and playing music on youtube, but, after 15 minutes in game, I feel that PSU blows out warm air which in my opinion is normal thing it should do right?
But, after those 15 minutes screen starts to shake little bit, so I guess in the end it is my PSU low wattage problem.
It is quality PSU (not top tier but still OK), so I didn't damage anything and I won't play games until I see what is the problem with PC!
Please help me about this, I would really appreciate it!
NOTE: I am also using 1x6 pin + 1 x 1molex to 6pin