I took my dual quad core 2009 MAC Pro and updated the Firmware to the 2010 5,1 to allow the CPU and Sierra upgrade. The CPU's I went to were Dual 6 core x5670's. I also upgraded the ram to 1333mhz after the CPU upgrade. When tightening the heatsinks down, do NOT over-tighten...You just snug it up or you may crush the pins on the socket!

Here is what I used from Amazon:

CPU's x5670: [ Ссылка ]
Hex key for heatsink: [ Ссылка ]
Arctic Silver: [ Ссылка ]
32GB Ram: [ Ссылка ]

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