Hi all, Sorry for bringing up a topic that has already come up but looking through some of the other topics didn't really help me. I am looking to upgrade my memory from 4 to 8 gb. Here's what I need help on... so under the system information under the memory tab it says "Your Mac contains 2 memory slots, each of which accepts a 1067 MHz DDR3 memory module." But then all I see on newegg are 1066 MHz, am I missing something here? or are they pretty much the same? What are your guys recommendation? http://www.newegg.com/Product/Product.aspx?Item=N82E16820233179 heres the one on newegg that I was thinking of getting. Here's the Specs (It was a refurb btw) MacbookPro 15 inch, Mid 2009 processor: 2.66 core 2 duo memory: 4 gb 1067 MHz DDR3 Mac OS X Lion 10.7.4 any help would be appreciated. Thanks.