eVGA 7800GT vs eVGA 7800GT CO

[dman918]

What prog are you using to OC the card? Coolbits2 or Rivatuner? I am using coolbits2 and it seems I may get 475/1200 without artifacts. At 495/1200, it was horrible in FEAR, though it passed the coolbits test and 3dmark05. Any thoughts?
Also, should I update to the latest bios? I have an evga non-co.
Thanks!