There will be basically NO drop in frame rate.Hmm i heard rumours MS has given out 32bit keys only on the discounted education one... but no harm in trying.
So the conclusion is, their would be not that much drop in frame rate?
Im pairing it up with core i5 and prob 4gb of budget ram now
You can still run stuff in 32bit in 64bit.
There is NO reason not to.