Hi Jim: Choose your RAM from a seller that guarantees compatibility with your model Macintoshjimjiminyjim said:I'm looking for 512 MB of PC-133 RAM for a Quicksilver 733 Mac. Crucial's got that kind of memory for $100 US. I'm looking to cut about 20 off of that. Any suggestions? (It can be two sticks of 256, or one 512).