I've never a framerate problem with JJ2. Normally, the framerate is supposed to be at 70. Now I have a max of 59 fps. If I go underwater, it goes down to 3 fps, which can get really annoying. Is it because my PC has gone too far? Or could it be driver issues?

My PC Specs:

2.8 GHZ Cpu
2 GB DDR400 RAM
NVIDIA GeForce 7800 GS (Driver Version 1.2.0.90)

I don't want to go into too much detail with that, but I would like to know if there is a fix to this problem

Thanks.