Ok so heres my rig: (No overclocks) Asus P6T Deluxe Motherboard Intel Core i7 at 2.66ghz GTX 280 6gb of DDR3 Corsair ram at 1600mhz Ultra X3 800 watt power supply My issue is that in certain games, Crysis, Guild Wars, Warhammer online, Call of duty 4, etc. I will play flawlessly for a certain amount of time, then it will crash. The screen will turn to a solid color(the color is always different and is usually the most used color on the screen at the time). At this point my PC is completely un responsive and must be turned off manually. There is no blue screen on start up. I have a short video on youtube showing this issue, if you type in "computer crash in games", my youtube name is kryptx101 ok so heres what i tried 1- Like anyone i guessed it was a graphics card issue, and so i RMA'ed my video card. The new card didnt change anything. 2- I then re-installed windows completely.(wiping the hard drive) This didnt change anything. 3- next i looked to the CPU. I measured it on 100% load and all temps were normal. It also passed every CPU test out there. 4- RAM was my next suspect. But i ran memtest on each individual stick 5 times. Still nothing. I spent so much money to get a dream PC, and it crashes constantly. I just want to fix this! Please anyone, any advice is very helpful. I pray that someone here has an answer, you would make my day! Thank you so so much for your time.