Serenatous

I am running vista 64 which seemed to be running well, except my color depth is still 32, is there any way i can change that to a 64 ?
Cuz i would like the better resolution, and graphic to well mostly luxury and leisure for games and other purposes.

I know its supposed to be internal and you only actually see 24 bit, but arent i supposed to see it as 64 or what ?

how am i supposed to know if its working on 32 or 64 ?

I some how would rather run it at 64 due to the better rendering...