Recently I installed a new graphics card (PowerColor Radeon HD 7770) onto my DELL Precision Workstation 490 (Foxxconn LS-36 mobo, 4gb DDR1 RAM, 2 Intel Xeon 5160 Dual Core CPUs @ 3.00 ghz, 750 w PSU, HD 7770 GPU). It seemed to go fine until I played Team Fortress 2 and then Minecraft. After I finished playing, my computer bluescreened within a half hour period and then everytime I went to start it it would bluescreen. I ended up thinking it was because I failed to completely uninstall the old GPU drivers from the ATI FireGL v7200 that was in my machine. So, I restarted in safe mode, which worked, wiped all of my display drivers, and reinstalled them from the PowerColor disk. The computer started up fine after that and I was very excited. However, today, after about an hour of Minecraft, the computer completely froze. Upon restart it bluescreened and now I just have it off. Is it possible that the drivers were not the reason for my first bluescreens, and that it was really my computer overheating? The computer could have just cooled down enough by the time I reinstalled the drivers so that it could start normally again. I dont know what to do if it is an overheating problem since I dont know what would be overheating. It is probably overheating because the bluescreens only happened after or while playing games. Thanks for the help, Im sorry that there is a wall of text but I felt it was important to get everything down.