Please help!!! I am getting lockups on 3D games. They happen randomly, about every 5 - 10 mins. Seem to occur more regulary if resolution is set high... This has occured on all 3 games I've tried since I've purchased my system. They are Far Cry, Doom3 and Max Payne 2 (MP2 was the most stable). Don't think the main processor is overloading as I've run it on 100% for about an hour with no lockups (did this by making a loop in VBA for Excel) Main memory seems to be OK as have run memtest with no errors. Have turned Fast Writes off, and AGP is set to 4x, still crashes. The types of crash I see are the screen just freezing (sound effects usually continues, or sometimes just stutters) or screen being filled with random coloured vertical lines. Have tried onboard AC97 and old PCI soundblaster, but no change. Radeon driver: 22.214.171.12476 Catylist: 4.9 Directx: 9b Processor: P4 2.8G Mem: Kingston DDR 512M Motherboard: Biostar with VIA PM800/VT8237, Socket 478 Have done a complete reinstall on another harddisk installing latest drivers only, still same lockup... Any ideas?