CPU Upgraded tray to Pro 12 CORE CPU 3.46GHz X5690 5,1 Includes 5,1Upgraded backplain Logic board which is needed Too work. See pics for Images of Specifications before Parting. Apple 4.1 upghraded to 5,1 Mac Pro Logic board 2009 A1289 Backplane, 820-2337-A 630-9399.
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