Maya 7 on 64bit XP ?

I hope this is not off topic two much.

I'm currently running Maya 7 unlim. on XP Home (32 bit)
I'm the only user of the computer/maya software.

Can Maya use 64bit XP OS for lots better performance ?
I mean, is there any real advantage to the new 64bit OS with maya 7 ?

I dont want to buy software that will not help maya run much better.
I'm already doing a considerable PC hardware upgrade and I dont want to waste
money.

Thanks,
-Areal