Firsty, let me say that the front side bus in 800MHz doesn't have to do so much with the currently os you are using but with hardware features(memory bandwidth, type and speed) of your PC. However, if you encounter any problems with the RedHat I would be interesting to know more. Since, im planning to install the 9.0 version in a newly bought system on which I have already windows 2000 and XP. THAT WOULD BE INTERESTING!!!