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How to Upgrade Mac Pro Memory (MacPro1,1/MacPro2,1): EveryMac.com
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16GB 4x4GB Apple Mac Pro 2009 Memory upgrade MacPro4,1 Quad-Core
How to Upgrade Mac Pro Memory (Early 2009/MacPro4,1): EveryMac.com
Building up a Mac Pro 4,1 (Early 2009)...do I need ti update my RAM? : r/ macpro
The differences between the 4,1 and 5,1 Mac Pro - The House of Moth
Mac Pro 4,1 (Quad Core, Early 2009)
