I don't know all the numbers nor do I care. I know that Win x64 boots a lot faster, runs a lot faster and just feels better. I still have a dual boot system only because there are still issues with drivers and modems, for me at least. FarCry 64 bit installation went well and the game runs so nice, framerate may not be much higher but it doesn't drop either. Photoshop CS2 does load and run faster and I do a lot of PS work so I can tell the difference. Give it a go, at least with Win x32 to back you up, you won't be dissapointed.