Faulty

My computer has been turning off at random times, even in sleep mode. Is there any way to confirm if my PSU is faulty or not? source

Well there's no reason most of the components in the PC couldn't run at 80 but that's besides the point. The odds that anything other than your graphics card would be kicking out that amount of heat are pretty low and since you say the graphics card is so low it isn't that. Unless you think there's a problem or can locate the heat source easily inside the case I wouldn't worry too much about it. source

My computer has been turning off at random times, even in sleep mode. Is there any way to confirm if my PSU is faulty or not? source

Unfortunately I don't have a spare GPU but I might be able to try it in another system tomorrow. When I press the power button I can hear clicking at the bottom of the motherboard but I'm not sure if that means anything. There is also supposed to be an orange LED light on the motherboard that indicated that the Dimm's are functioning but it doesn't turn on. I'm also dealing with EVGA support through email but I might have to wait until tomorrow to get another response. source

Is it possible that Blue error screens are caused by a faulty windows copy. I had a lot of problems with that then i built a new pc and all the old parts were removed besides the modem and the windows XP version. Could it be possible that the winodws is the cause of this problem? source