When it comes to Linux and NVIDIA, both seem to go together like peas and carrots. Until the 8×00 series was released, however. As Michael at Phoronix has discovered, the 8-series is where NVIDIA is seriously lacking. Compared to Windows, Linux is held back significantly, whereas older cards/driver versions would keep Linux performance on par with Windows. We can only hope that NVIDIA will sort this out soon, but no doubt their focus has been on Vista lately.
After being tipped off that there may be some serious performance regressions with the GeForce 8 series on alternative operating systems, we explored this issue further and after confirming this problem exists in the latest Linux display driver, we have conducted some Windows XP and Linux benchmarks to explore this issue further.
Source: Phoronix