64bit

Is having a 64bit windows better than 32bit if you have 2GB of ram? I know that 32bit can only read about 2.5/2.6GB max RAM and 64bit is more useful if you have quite a lot of RAM. But, is getting a 64bit better regardless only if you have 2gb? Anything in performance or speed?

Well, I got some money for my birthday, so I thought I'd buy myself a new CPU, since almost all the new games I buy lag. I don't think it's in my RAM, I have 512 MB of RAM, and I think that isn't too little for games. I'm currently using AMD Athlon 2200+ 32-bit, so how much will game performance...