I am Digest, so CC me and the list please ;-) I just saw a few posts where users of Rev A. Clamshell owners have used 512MB sticks in the machine and it recognizes it. My machine is a server and with the apple limit of 288 (32 onboard and 256 as a chip) and I would love to go to 512+ but was told a few months ago when I upgraded the HD to 20 GB, Jag, and the 256MB chip that that was the absolute limit. funny that it now may work. Do you folks see the actual speed boost on any bench tests? Is it a seat of pants thing? I need to get more ram in there but do not want to waste money. BTW, I have a spare 128MB chip that I had upgraded when I got it just sitting here. I may have a machine for it. Appreciate the answers folks!!! Now I am shifting gears if my wallet will allow! erik (digest afflicted, hoping for CC's to me and the list.)