On Aug 19, 2006, at 6:41 PM, Nicolas Kinnan wrote: > I'm no expert on anything, but I've long had a similar problem with > my 533DP, running 10.3.9... I have two 512MB PC133 DIMMs that I > bought specifically because they were CL2, but System Profiler has > never, ever recognized them for what they are. It has consistently > reported one as CL3 and the other as PC100! I have no idea why > this is, as I am either very certain they are premium RAM, or at > least I have convinced myself they are. They both say PC133, at > least... The System Profiler just reports the description, if any, that the manufacturer has stored in the DIMM. There's no timing or testing be done. Phil