yasamoka wroteDude look...you didn't even troubleshoot yet...all you got is some random trial and error procedures that are inconclusive. Basically you have 5 variables:
1) System
2) Graphics Card
3) Drivers
4) Cable
5) Monitor
Change one at a time and see where the problem lies.
1) i can't try it in a different system since i don't have another system that has a PC-E x16 slot on it
2) I know its not the graphics card
3) i know its the drivers because if i use XP and the XP version of the drivers i can find 1440x900 (by default)
4)Its not the cable
5) Could be...but i don't have another DVI monitor available
so its definetally a 64-bit driver issue since the 32-bit XP is running OK.