Do you have an IDE or SATA drive?
If you have a SATA DVD-drive i am 100% sure that I know what the problem is
I have the same motherboard, had the same problems, and had to researched for 2 days to find a fix for it.
As absurd it may seem the 750i chipset has many compatibility problems with SATA optical drivers. There is a lot about it on google and many peope are having BSOD problems while using their optical sata drives (explains why you get BSOD while gaming and not in idle). Here is a thread about it: http://www.ocforums.com/showthread.php?p=5656072
I tried many drivers and found only the 8.43 version to fix the problem. Download it here and it should fix your BSOD problems, good luck!!
http://www.nvidia.com/object/nforce_winxp_8.43.htmlEdited by tibor28 - 11/8/08 at 6:14am