...it will just shut it down. I think it is my power supply as it often get very hot and along with that...Coolmax, off-brand company I believe. I also have 2 monitors. I have GTA IV set to medium settings and with Half-Life 2 Deathmatch, probably full settings. Also GTA IV's graphics glitch up quite often. With GTA, my GPU gets around 70C, and my CPU around 60C I think. Windows 7 Ultimate (SP1) ASRock N68C-GS FX (w/ latest BIOS) NVIDIA GeForce 550 Ti 1GB AMD Athlon II x4 630 2 HDD's (one 500GB and one 1TB) 8 GB Samsung (I think) RAM 600W Coolmax Modular Power Supply. And this probably isn't all the info needed...I would have to check later.