12 Core 2009 Apple Mac Pro 4,1 Pair X5690 3.46GHz XEON CPU upgrade kit Delidded

Mac Pro 2009 4,1 (to 5,1) Delidded CPU Install Guide (x5680 x5690 12-core CPU Upgrade). No residues of solder, thus much better thermal conduction. Only intended for Mac Pro 2009 dual CPU model. Need upgrade to 5,1 firmware before install.