Ok.I have Windows 7 ultimate.I have duo core 2.9 Ghz processor and video card Nvidia Geforce GT 430.RAM - 3.1 GB.Well,my problem is: when i start to play game like Darksiders i can play only 5 - 6 minutes and my computer go in power saving mode or just freeze.My friends tell me this can be 1.Bad PSU 2.Problem With Nvidia and Windows 7 Drivers. I have windows xp and windows 7 on my HDD.But i use windows 7.Windows xp is in disk C:\ Windows 7 is in disk E:\ is that problem or... Please Help me i have reccomended settings to play a lot of games but i cant.What can i do.