I recently upgraded from 512Mb to 1Gb which did make some difference (I'm pleased to say). Perhaps I shall have to wait after Christmas and go for 2Gb. BTW, I have two sockets of 512M and one free. Would I be able to put a 1Gb in that socket without difficulties of different size modules?
I've got the same motherboard with an Athlon 2700 (real speed 1.7???). System has had extra memory etc, but processor upgrade. I seem top remeber that the computer manufacturer (Campus, now defunct) said that this was the fastest offering that could be fitted, but Bios upgrades have probably changed this.