I purchased a Sapphire 2900XT 512. I have a Giga-byte P35T-DQ6 board with f2 bios and running Vista 64 on 6700 Intel with Cosair 1333 ram. When I load the driver all installs fine, upon reboot when Vista loads driver the machne reboots again to the Last Known Good screen.Anyhave any tricks for making the driver work. I have tried the Catalyst 7.7 driver. Thanks in advance