This is a question I see in search, but the answers are still unclear. I have two macbooks. One is the very latest 2.4 poly 7,1 with 1033 ram and the other is the 2.16 Rev C 2,1. I just bumped the 7,1 up with 8gb of 1033 ram and now I have two spare sticks of 1gb 1033 from the 7,1 and I want to stick it in the 2,1 which has 2 sticks of 1gb 667 in it. Will this work?