I must admit to being an AMD convert with my new box "demonic blue" (I name all my boxes, "My Computer" is sooo pedestrian!) (dual Opteron 280's - 514% faster than the "bambelweeney" (P4 2.4))
Just remember that Windows XP can only handle 4 Gb of RAM total and 1.7 to 2 Gb per app (total of all threads involved). Vista and XP64 are not subject to this memory space mapping issue.

BTW, any else name their boxes? (my old IBM thinkpad is "lo-tek")

Pass no temptation lightly by, for one never knows when it may pass again!