After reviewing some recent post on this subject I recalled a URL that runs ads for 2K upgrades. It made me have fond memories of when I first got my Pismo & it was a rule that 512k was the max ram it could take. Once the 512k sticks were out I have been running 1024 ever since! I have two Imacs that are reportedly within the "upgrade zone" of 2K. Has anyone done this or had this done before? Here is the URL: http://www.18004memory.com/cart/addcart.asp?Try=Yes&itemID=502581&itemTYPE=cat They offer a kit for most of the >800 MH Imacs.