Mark, I reckon that Keith has it right - but you might like to download a piece of freeware, Memorystick and try it for a while. It will give you a picture of your memory use, crude, but good enough to give you some idea of yur memory needs while you are using your mac typically. It can be found at: http://www.versiontracker.com/php/dlpage.php? id=13636&db=mac&kind=&lnk=http%3A%2F%2Fpages.sbcglobal.net%2Fmattneub%2F downloads%2FMemoryStick1.3.1.dmg.gz I believe that the max RAM is 1.5GB David On 5 Feb 2004, at 11:15, gooddog at interlync.com wrote: > Folks; > > I've got a 450 mhz Cube with 288 mb of ram installed (2 x 128 on top > of 32). What combination of memory do I need to buy to expand, by > either adding or replacing, to the maximum, which I understand to be 1 > gb?