Oh and FWIW, I did a memory stress test as well. I just know this works for these two machines. I'm not stating this would work in all Macs, and I don't think this would work will all memory speeds. Similarly to how your system might behave if you swapped in a faster or slower processor in Macs that support that (i.e. My understanding is that the system detects the slower memory, and then runs a but slower as a result. I have read reports previously about how it was possible to use slower or faster RAM than recommened in Macbooks as long as they matched: I think Apple doesn't recommend it for performance reasons not stability reasons.īoth machines post the correct memory speed, and even more interestingly, on the memory tab of the system profiler it even reminds me to be sure to fill the next DIMM slot with the same speed.
