I have an athlon XP 3200+ and only 256 MB ram and I multitask this computer to death. I OFTEN run Gimp, photoshop, bearshare, windows media player 10, firefox with at least 5 tabs open, outlook, word, frontpage, nortan 2003 antivirus software, roxio easy cd creator, windowblinds, and msn messanger all at the same time, and it just barely starts to slow down.
IF I had more ram I am SURE I could run at least double that ammount of apps at the same time.
A couple days ago I rendered a HUGE flame in gimp that had a file size of over 65mb with a dpi of 300. Gimp was taking 46Mb of ram and flame.exe (which makes the flame) was taking up 92Mb. It took a half hour to render it.
Why a half hour. Because I don't have enough ram, the processor was only running at abut 14% capacity but all the ram was taken up and the page file was maxed out.
I am sure if i had about a gig of ram it would have rendered it in a couple of minites or less.
I have tryed to do simular things on intel computers WITH 512 and a gig of ram and they would just crash after a couple of minutes.