I have built a new system using a P4 2.26 processor, Gigabyte 8IHXP MB, 512 MB 0f 1066 RDRam, and an ATI Radeon 8500 video card, running WinXP. I seem to be having an AGP problem on the board. I am on my second Radeon card, and have also tried a PNY Verto 440. The system will boot to the Windos XP screen (sometimes) or lock up after posting. I have tried the latest drivers from ATI, Intel, Gigabyte, Microsoft, etc, for all of the components. I have tried uninstalling and re-installing drivers, changing my bios settings, goat blood and chicken bones (just kidding), but nothing works, I am able to run in VGA mode only, and the system is very prone to crashing. Any Ideas?