I recently installed 9800 gt 1 gb card.The problem is that i am facing random lag while playing games such as Fifa 09,Wolverine,GTA 4,Bioshock,Prototype Street Fighter 4 etc.The game loads fine and it starts off very smoothly however then suddenly it lags for like 4-5 seconds and then it's back to normal.
My config is as follows:
Pro - Amd 64 x2 Dual 5200+ 2.7 ghz
Mobo - Asus M2N-MX SE Plus
Ram - Transcend 4 gb
Psu - ViP Gold 500W
Gpu - Evga 9800 gt 1 gb
Os - Windows xp 64bit
Monitor - 14" Samsung
On a 14" monitor that card should be giving you silky smooth framerates.
1. clean previous drivers then install latest drivers.
2. enable PhysX GPU acceleration
3. could be hard drive loading, defragment
4. 3dMark06 score seems not just low but very low for a 9800 GT