Mac Pro 2009-2012 Dual CPU Service & Repair (2009, 2010, 2011, 2012) - iFixit Repair Guide
How to Upgrade Mac Pro Processor (Early 2009/MacPro4,1): EveryMac.com
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The Definitive Classic Mac Pro (2006-2012) Upgrade Guide
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The Definitive Classic Mac Pro (2006-2012) Upgrade Guide
How to Upgrade Mac Pro Processor (Early 2009/MacPro4,1): EveryMac.com
