I have an iMac (late 2006 Core 2 Duo model) that originally came with two 512MB DDR2 533MHz for a total of 1 Gig. About 2 years ago, I replaced one of them with a 2GB DDR2 800MHz. Now, I have recently replaced the remaining module with a 1GB DDR2 667MHz.
Now, according to the specs of my machine, it is capable of memory speeds up to 667 MHz. Yet, the system info is reporting that both are running at 533MHz.
Why is that? I would have expected that they both would run at 667MHz.
For the record, the first one was made by PNY and the second by Kingston.