Please Help my Open GL is wierd

when i play a game with open GL i get strips of small dots all over textures, i had the same prob with win 2k im running XP now, what is with this how can i stop it? i have the newest detanators and everything. BTw should i get the new 4 in 1 drivers or would it screw me up ya think ive heard stories about the 4 in 1’s
FIC AZ11 mobo
1100mhz T-bird
Geforce 256 DDR
SB Live! value
192Mb Ram
Linksys NIC