Hi, This is my first post, and much like other people, it is because I have a problem I have a HP Pavilion t775.uk 3.0GHz PC which came with a X300 graphics card. Since my son loves playing games, I decided a few months ago to upgrade the graphics card to a X800 and bought a PowerColor X800 GTO 256Mb card. All seemed okay for a while, but we have noticed quite a number of instability issues since installing the card. The screen will quite often just go blank for a second or two (almost like changing video resolution settings) for no apparent reason, and it can happen at any time too, the PC need not be doing anything at the time. Other symptoms include hanging during games, the VPU recover restarting the graphics card on games including Sims 2, Eldar Scrolls Oblivion...two of my sons favorites; we also get PC crashes...the screen will freeze, the PC will hang for a few seconds and will then reboot. After a crash, a minidump is left, and the Microsoft On-Line crash analysis confirms the problem was with a video device driver. I have tried upgrading the PC to the latest Catalyst versions but to no avail, and I obviously dont want to turn off hardware acceleration, since that defeats the object of changing the card in the first place. I have started running out of ideas. Can anyone give me some advice?? Is ther an issue about running the HP t775.uk with an X800 GTO?? Is the PC just not up to the mark?? Is the card faulty, wrong slot, wrong IRQs, etc.etc. I have tried contacting PowerColor, but they have ignored my emails. Any help or advice you can give would be gratefully received. Thanks, Paul.