Xeon 2.8 GHz 4 core - Single CPU Tray for Apple Mac Pro 2010 & 2012 MacPro5.1. Xeon 2,8 GHz 4 core - Cassetto singola CPU per Apple Mac Pro 2010 & 2012 MacPro5.1. Functioning assured for logic boards with SMC version 1.39f11 (Mac Pro 5,1)If mounted on a 4,1 logic board (even if upgraded to 5,1 with SMC 1.39f5) the CPU drawer will work, but not the cooling system that not recognizing the board, will always go to maximum.
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