So I build my PC more than a week ago, and since then I have only had bad luck. My GPU has coil whine, had to RMA that, didn't apply thermal paste right, reapplied it, thought/think my WD Black is gonna die on me and now I'm really taking the piss. So I thought I'm gonna stress test the CPU and memory with Prime95. So I did Torture Test and then Blend. So I left it for 4 hours. Then after coming back to my PC after 2 hours and checking the PC was already acting pretty slow, but I thought that's probably because the processor is using all it's power in the Torture Test so I left it for the other 2 hours. And when I came back I moved my mouse so the screen would show up because it turned black but it wouldn't, so I was like what's going on?? So after like 3 minutes my PC decided to turn on the screen so it did, it was black with only the mouse, I was no not this again because this happened before. But then after a few minutes the whole screen showed up again but the mouse wouldn't move really, it moved every 5 seconds or so and after trying to stop Prime95 and the screen going black and back (ha) I decided to turn the PC off. So any idea why this is happening to me? You would think a 4790K would be able to handle this.