amd 64 problem ?!?!

[Pathfinder]

ive got a athlon64 cpu 3800 + and 2 gig ram ...x1900 grafic card i still get grafic bug after 2-4 min inside game .....any one know to the problem or can help out ?

plz beg beg ....

pathfinder:worthy:

 

[Twist]

Reinstall or update your gfx drivers - always the first thing to try