One more thing, I am getting huge drops in gpu usage in Crysis every 1-2 minutes, then it recovers in about 1 minute and continues this cycle.
Afterburner shows that my vram is not being maxed out (only ~750mb/1gb gtx 460).
It also shows that the gpu usage drops from 99% to ~30%.
Could my cpu be bottlenecking it? I can't find an OSD for cpu usage that I can use in games. I wouldn't think a PII x4 at 3.4ghz would bottleneck a gtx 460, unless the motherboard is cutting the voltage/frequency.