Ok I am a atholon guy, i was wondering what is the major dif between like and athlon xp 3200+ vs like the 300064 or all the 64 chips they are both 400mhz fsb, 512 L2 cache, other than the fact that one is 32bit the other 64. and those cpus, on a MB that has Nforce chipset with an Nvidia 6600gt over clocked, is it really worth the money to get the 64bit even though alot of apps still do not take full advantage of this architecture. I mean i could get XP 64bit edition, but will it make much of a performance differance overall? I know from experiance I hate the p4s with HT. they tend to have a pause when you are doing some major multitasking switching between the apps.