The benchmarks are all run on the Vista Beta 2, but I think it paints an ominous picture for the upcoming OS. They run both 32- & 64-bit Vista against WinXP on a bevy of benchmarks, including gaming. Wanna find out which system runs BF2 better?

"Windows Vista is system intensive, as we knew it would be. We set out to find out just -how- system intensive it is. We run a slew of benchmarks and gaming runs on both the 32-Bit and 64-Bit versions to see how they compare to XP."