I have a total of 512 mb ram which consists of a 256 mb pc133 stick (apple spec), 2 64mb pc 100 sticks (both apple spec) and a generic 128 mb stick of pc100 (bought this at a pc store). the 128 generic stick is slow. when I take it out and do an xbench memory test I always get about 5 points higher and things like fill go from 250 up to about 300+. this really says something about that stick since in benchmarks at least my mac is faster with less ram because all the ram left is faster. my question is performance wise would it be better to leave this generic 128mb stick out and run with 384mb or to put it back it and run at 512mb.