I’m guessing 4 GB will be enough for now. I will be on XP for almost a year, then afterward I’ll decide if 4 GB is enough or not. We use the machine for MS office, Internet, and some gaming. My wife uses Publisher and Powerpoint a lot. I mainly use Excel, IE, and games.
The only reason why I am upgrading is because lighting took out most of my old Socket 939 AMD rig. I am using a 10 year old P3 system which is driving me crazy! No more Need for Speed for me. LOL
Now I just need to decide which RAM to buy. I like to play around with a little overclocking so I’d like to get some decent 1600 CAS 8. However for my use, I’m sure stock speeds with 1333 will probably be just fine.