is 64 bit and 8 gb ram the solution for the problem of freezing working windows ? (5 millions polygon and a lot of imported objects scene, organized in layers)

as i worked with a p4, 3.2 gh pc, i had the same problem, and it was not getting better wit the q6600, 4gb, and geforce 8800 gt.....

jeff in the perfect vue computer thread said that vue 7 is not 64 bit able. in fact there is a 32 and 64 bit version installation.... do anybody know what he ment with that?