I've been tearing my hair out over this problem and im about smash my computer with a 3lb sledge hammer because of the frustration I'm having with my graphics card.
I bought this card in febury and i only had a 4x AGP slot on my mother board, so i upgraded to a sparkle mother board with 8x AGP so i could get my moneys worth from my graphics card.
After exploring some settings this morning, i found out that my graphics card wasn't actually untilising the 8xAGP feature, kinda odd i thought, so in the ATI control centre program, i changed the AGP settings from off to 8xAGP. It came up with " your system needs to restart. if the settings are unstable, they will be reset to default" or something along those lines.
So after the reboot i checked my settings and they still were set to off. I checked the BIOS to see if 8xAGP support was enabled, and it was; reboot, still off. Frustration kicks in!
I also updated the drivers, rebotted again, changed AGP settings, reboot again, 8xAGP still off!!!! Its like the graphics card or the motherboard doesn't know that each device is 8xAGP compatible!
Now is it the card or the motherboard? or am i not doing something right?