The problem is thet most new games such as Metro 2033, Mafia 2, etc. are giving occasional low frame rates. I get around 50-60fps which suddenly drops to around 10 for a few seconds. System specs:
nVidia 9800 gt
Asus M2N-CM DVI motherboard
AMD Athlon 64 X2 dual core processor 5000+
3 GB of RAM
I have tried updating my graphics drivers and tweaking with the nVidia control panel.