Nowadays drivers which are bit specific are downloadable as both formats. As far as I am concerned, by controller driver is 32-bit, working fine with me. even my 32-bit nVIDIA drivers were working fine.
yea i figured out what i did wrong...when i was installing windows 7 i didnt push the button tht said update system via internet connection....i pushed the other one so all of my drivers dissapeard...on the plus side i can run smg at pretty much full speed except in the intro (75%) and the star center...or whatever its called...the place where the grand stars go (50-65%)