3DMark06 tested under Windows Vista x64 and Windows XP Pro x64

Base on the score both seems to be even, I did reached 5584 on Vista before. For some reason on Windows XP Pro x64, when i use ATI Tool 0.27beta I get about around 100 points lower than RivaTuner v2.0 Final and both program had the same overclock setting (567 core 774 memory) but RivaTuner gave me about 100 pts more...