Horrible artifacting on vista/win7 but ok for XP

[wesley]

hi guys

spec of my machine:

E4300 1.8ghz overclocked at 2.4ghz
4GB ram
asrock dual-coreSATA2 rev2.0 mobo
64GB SSD
nvidia 6800GT

get perfect screen on XP, but get really horrible artifacting(sp?) on vista and win7, using nvidia driver, dunno why. sometime when booting up, i cant see the logon screen very well.

why?

thanks

 

[wesley]

yes i always use driver from nvidia website

thanks