A1289 4,1 Mac Pro Processor Tray with 2.67GHz Xeon CPU 4 Cores. Fully tested and in great working order. Pulled from a 2009 Mac Pro. CPU Model: Xeon W3520. if you buy ourUpgraded 4,1 Logic Board professionally updated to 5,1 Firmware which will Allow this CPU tray to use Updated below 6 Core CPU's And upto 64GB 1333Mhz DDR3 RAM (Not included in Sale).
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