Quote from flipflopper:
I was under the impression that XP only allows me to utilize 2Gig of RAM.
If you install 4G RAM, XP 32-bit will allow you to use 3.25-3.5G. XP reserves the rest for some system functions. Depending upon how many peripherals you have installed, the amount of RAM might be less. On my loaded-up trading rig, System shows only 2.75G RAM available to me. but that's not a problem as the most physical RAM I ever use is about 800MB.
Having more RAM installed which is not being utilized will not speed things up at all.