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The Early 2009 Mac Pro—also known as the Mac Pro 4,1—introduced Intel's Nehalem architecture to Apple's line of professional desktop computers in March 2009. The Mac Pro 5,1 used the same interior design but received further CPU updates in 2010 and 2012.

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Apple Mac Pro 2009-2012 logic board

Hi everyone,

I get little confused about this line of Mac Pro. If I am right (if I am wrong please correct me with some example):

2009 / 2010 / 2012 have SAME logic board (the big board what is attached to the case) only diference is the CPU/RAM board ? That is what making difference between 1CPU/2CPU’s ?

So if I will have 2009 1CPU Mac and I will swap the 2CPU’s/RAM board (just the board with CPU’s and RAM what “slide in”) from 2012 it will work and I will have 2012 Mac Pro ?

Thanks a lot for your time guys.

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So can I use CPU’s board from 2012 on 2009 ? Thanks

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You cannot. You can flash a 4,1 to a 5,1 as @guardian10 said, but it will freak out and ramp the fans up due to the smc not knowing exactly what it is if you use a 5,1 tray in a 4,1 (and vise versa).

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Thanks a lot for clarification mate.

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They have slight differences on the logic board, but a 4,1 can have its firmware flashed to 5,1.

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Rob will be eternally grateful.
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