MacPro 4,1 W3540 2.9 to MacPro 5,1 W3580 3.3 Upgrade - Step by Step Shots - Success! | MacRumors Forums
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How to 3.46 GHz 12 Core Processor Upgrade a 2009-12 Mac Pro , revised with Northbridge repair and re-thermal pasting update . – Creation Machines , LLC
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