No BSOD System Shutdown

killingdyl

Honorable
Jun 26, 2013
22
0
10,510
So for the past few months my computer has been shutting down like the power went out with no BSOD. It only happens when i play games though. It doesnt happen when I watch 1080p videos, or render 1080p videos. Most of the times it happens within 10-15 minutes. I've ran Prime95 and Furmark for about 1 hour without any problems. I'm suspecting it is my power supply.

System Spec:
Intel I7 920 @ 2.67 GHz - Water Cooled by an Antec 920
Sabertooth X58 Motherboard
Radeon 5770 with 1GB GDDR5 in Dual Monitor Configuration
750W Thermaltake RX-750AX3CH
12 GB RAM Corsair Vengeance
3 500 GB Hard drives that are about 4 years old each
1 DVD-RW drive
1 Fan in front - Taking air into case
1 Fan on side - Taking air into case
2 Fan on dual thick radiator in the back exhausting air

System Temp(Idle):
CPU - 47C
GPU - 51C

System Temp(Load):
CPU - 73C
GPU - 85C

Ambient Temp is about 24C
 

killingdyl

Honorable
Jun 26, 2013
22
0
10,510


I downloaded speedfan and these are the voltages it reported

1st column
Vcore: 0.94V
+12V: 11.46V
AVcc: 3.23V
Vcore: 0.94V
+3.3V: 3.22V

2nd column
+5V: 4.97V
+12V: 12.19V
GPU Vddc: 1.20V
 

killingdyl

Honorable
Jun 26, 2013
22
0
10,510


My +5 volt jumped up to 5 which didnt seem like a problem and both of the +12v rail readings dropped about .1 volts (11.46 to 11.35 and 12.19 to 12.08). There was also 2 dips on the +12v rails of about .02 volts

I measured with a multimeter to be sure and the readings match up.