spec: Q6600, GA P35C-DS3R bios F4b, G.skill 8GB DDR2 800mhz, SAPPHIRE HD2900XT 1GB ddr4, vista64bit & xp pro 32bit.
previously using SAPPHIRE x1950pro, no problem at all under both xp 32bit and vista 64bit.
after uninstalled 1950pro, i installed 2900xt with newest driver 7.6.
xp...