I'm upgrading RAM to 6GB (max for this model). After installing OWC module I'm seeing the 6GB, but RAM speed is shown at 533MHz. Is this nominal RAM speed for this model? I thought it was higher so I'm wondering if I might have inadvertently switched modules as I was also upgrading a 2008 2.4 GHz MacBook. The 08 MacBook Pro shows RAM speed at 667 MHz, which I think is correct. Anyone know where I can get the actual spec values? Thanks for any insights.