How to Upgrade Mac Pro Memory (Early 2008/MacPro3,1): EveryMac.com
2009 Mac Pro ram ? - Apple Community
4GB 2X2GB Memory RAM for Apple Mac Pro 4-core Xeon 3500 3rd Gen. Early 2009 240pin PC3-8500 1066MHz DDR3 ECC UDIMM Black Diamond Memory Module Upgrade - Walmart.com