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did you get the new aluminum mbp? I'm pretty sure those run DDR3 Ram. DDR2 was used in the older MB(White/Black) and MBP.

So if you have the new aluminum pro this will not work.
 
That should fit then. I just got this setup from fry's a couple weeks ago and it seems to work just fine. I had trouble getting the screws out to change it but my buddy had the right screwdriver and we were able to change it it about 2 mins.
 
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