Hi all, About 2 months ago I updated to an NVidia GTX465 1gig PCIexpress. Now I think it maybe developing a fault but I need some kind of software to test it, I have tried a few different progs but they just turned out to be rubbish, one of them give me a frame rate of 944 (mad)... The problems are: sometimes it will sort of give me lines across the screen and other times I get a blue screen of death (usually when playing Black ops) but the blue screen does not give me any error codes...Also occasionally I just get a black screen and the monitor turns itself off. I can't really understand it because it does not happen all the time, sometimes I can play Black Ops for a couple of days with no problems, but then bang...blue screen. So if any of you can point me in the right direction of some software that will test my card to breaking point I will be eternally greatful. Or if you know what might be wrong with this card or my system can you please let me know. Thanks, Tiffster....... System specs: Pentium 3gig dual core, 4gig OCZ Gold 800 memory, Asus P5N-D SLI Motherboard, 570watt PSU. Windows Vista Ultimate x64.