Because most games aren't able to take advantage of multi-core systems.
A fair few modern games can utilise dual cores, but most can't take advantage of quad-core yet.
So at best the OS may delegate menial running tasks to another core while you game
Probably not until next year, I would imagine, will games really utilise multi-core systems effectively.
Well yea. BUT since all procs are 64 bit, it must be really hard to compile games for both 64 and 32 bit, otherwise, more devs would be making it available.
And running the Crysis bench, I see only a tiny difference in FPS between 32 and 64.
I must be missing something important.
Yes you are. And here's what. Why would you expect 64bit code to be faster than 32bit code? Is there a rational reason for your expectation, or are you simply seeing something that's twice as wide and thinking it must be twice as fast? What is the basis of the expectation?