48GB OWC Mac Pro / Xserve 2009 Sextuple Channel PC-8500 1066MHz DDR3 ECC SDRAM Modules (6x 8GB) by OWC

At OWC, we want your Mac to perform faster and last longer. That’s why we engineer memory specifically tested and optimized for Mac. There’s OWC memory for nearly every upgradeable Mac, from the PowerMac G4 to the latest 2017 iMacs. Plus we make it easy to upgrade by yourself with step-by-step install videos, and included toolkits. It’s the easiest way to improve your Mac’s performance.

Compatible with:

• Mac Pro 8-Core (Mid 2010)(July, 2010) Model ID: MacPro5,1 (2.4GHz)
• Mac Pro (Early 2009 8-Core)(March, 2009) Model ID: MacPro4,1 (2.26GHz, 2.66GHz, 2.93GHz) 

• Xserve 8-Core (Early 2009)(April, 2009) Model ID: Xserve3,1 (2.26GHz, 2.66GHz, 2.93GHz)
• Xserve Quad-Core (Early 2009)(April, 2009) Model ID: Xserve3,1 (2.26GHz)

• PC Desktops: Compatible with Intel / AMD Process based PCs capable with the specifications listed above. ​
• PC Servers: Compatible with Intel / AMD Process based servers capable with the specifications listed aboveCompatible