My computer is a year old, and recently I have noticed it shuts down under stress. I have an FX-8120, 7870 video card, an MSI 760GM-P34 (MS-7641) motherboard, 8gb ram, and an 800w power supply. HWMonitor shows VCORE from 0.960 to 1.4 idle. Also, temp fluctuating between 26 and 51 idle and it changes almost every second. Video card is cool at 30 degrees. I have the stock fan for the cpu, no overclocking, and I reapplied the thermal paste. Under stress the cpu temp goes to 80 degrees!?!?!?!? Any help would be greatly appreciated