I think I solved the problem! I previously had a BFG 6800 OC and then a BFG 6800 Ultra installed and I'd been told by BFG tech support to set the AGP VDDQ Voltage to 1.6 Volts in my mobo BIOS settings and that's were I left it when I installed the AIW X800 XT. I experienced a random system crash when playing Half-Life 2 so I thought I'd check my BIOS settings because I do have a 10% overclock on my system from 200 FSB to 220 FSB and I changed the AGP Voltage back to default 1.5 Volts and then ran 'Scan For Artifacts' for 12 minutes at default 499.50/499.50MHz without crashing!
The only other BIOS setting that I might need to change is 'AGP/PCI Frequency (MHz)' which I currently have set to Auto. In my Asus P4P800 SE BIOS I have 3 other options:
With my system overclocked 10% what would be my best choice for AGP/PCI Frequency? Thanks in advance!!