So, having just ordered my 6core Mac Pro i'm stuck with the mandatory RAM upgrade ... I'm planing on something in the 16GB department ... so 4x4GB would be my first choice. Now reading all the posts here I'm quite confused wether this is the right choice: - Three 4GB modules would give me the tripple channel benefit ... would adding a fourth 4GB module (making the total of 16GB) harm the performance (bus speed, etc) as it's "an extra module"? - Kingston offers ValueRam PC3-10667R .... which is different from the DDR3 PC3-10600 other Mac-specific shops offer. Would the Kingston RAM work in my Mac Pro? and no ... my budget is rather limited so three 8GB modules are a no-go Thanks a lot guys!!