Been there, done that with a TNT on a super7 motherboard. Super7 motherboards and TNT video cards are hard, but not impossible, to get working right. First, make sure you have the latest VIA 4 in 1 drivers loaded. They include the AGP GART driver that "tagej" mentioned in his post. Make sure you load the AGP driver portion of the 4 in 1 in Turbo mode. After loading the 4 in 1 driver, you need to make some BIOS changes. First, go into the BIOS Features Setup screen and disable Video BIOS Shadow and PCI/VGA Pallette Snoop. Second, go into the Chipset Features Setup screen, disable Video BIOS Cacheable, and make sure AGP Aperature is set to 64mb, regardless of how much RAM you have installed (I know this sounds strange, but this has proven to solve many problems with AGP cards and super7 motherboards). Third, go into PNP/PCI Configuration screen and enable Assign IRQ for VGA (if it isn't enabled, this is most likely the reason you get the error message you are seeing). Fourth, go into the Integrated Peripherals setup screen and set Init Display First to AGP. When you reboot after changing the BIOS settings, your card should be properly recognized and the correct drivers that you previously installed will be loaded by Windows. You should also have no lockup problems with running any 3D games.