Wow, 32 Amps on a 430W? That's pretty damn good from what ive seen.
660TI recommends 28Amps (Along with the other basic parts to make a system work)
on the +12V rail. To be safe, I would get a GTX 660 (Non TI). Always good to have a little headroom =D and only needs 24AMPs (with the other basic parts)
I already purchased my 660ti lol it runs perfectly, havent got a BSOD even after intense gaming on large 1080P screen *knocks on wood* and im not exactly sure what all of the Volts on Rail stuff is... lol