I've got a Tyan Trinity KT motherboard based off the VIA KT-133 chipset, and I discovered the other day that my AGP port is stuck in PCI compatibility mode. I suspect I could squeeze more frames out of my GF2 if I could get the port into AGP mode, but I'm not sure what the problem is. I installed the latest Via 4-in-1 driver at Zorro's suggestion, and made sure that AGP is enabled in the BIOS. It seems to me that I had it working correctly when I was running Windows 2000, but it switched back over to PCI mode when I formatted and went to Windows XP a few months ago. Is there a setting in Windows or a utility that can throw the AGP slot into the correct mode?