OWC 32GB (2 x 16GB) PC10600 DDR3 ECC-R 1333MHz DIMMs Memory Compatible with Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems and Early 2009 Xserve. at Amazon.com
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ZTC 8GB 1867MHz DDR3 SO-DIMM PC3-14900 SO-DIMM 204 Pin CL11 Memory Upgrade Kit for for 2015 (Late) iMac 27" w/Retina 5K Models and PCs which utilize PC3-14900 - Newegg.com
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