To everyone who may have trouble with their Graphics Cards: (However some may don't need some of the steps)
1.Check MB graphics bandwidth compatibility(PCI-AGP(2,4or8x)-PCI-E(16x))
2.Install a clean version of windows(Preferably WinXP SP2 32-bit)
3.Download and install Microsoft's program compatibility patch (For Vista Users)
4.Get the latest MB chipset (e.g. Intel945p+ICH8) driver from motherboard manufacturer website
5.Get the latest MB BIOS from motherboard manufacturer website
6.Get the latest graphics card driver from NVIDIA
7.If possible, Get the latest patches for your games and also updates for your Windows
...
If anyone can't try the steps given or the problem still persists after following the steps, inform me so I can provide him with the needed help to follow the steps or to provide further steps.
Wishing to help