Forgetting, for the moment, the advantages afforded by more RAM being addressable, what performance gains are typical with say, vista 64 over vista 32?
Do all games perform better, or does it vary widely? Is there a list somewhere of games or game engines that perform a lot better in 64?
Update: Thanks for responses so far.
I guess I'd assumed that by now, most of the major game engines (Unreal, Source, Cryengine, etc) had special versions, not only compiled as 64bit executables but also modified to take advantage of the increased power (I'm imagining some lower-level 3d graphics math or physics or something being faster because of techniques that take advantage of the larger address space and/or any new instructions). Thus some games would have a significant boost in performance. Is this not the case?