64GB 4x 16GB Hynix ORIGINAL 1866MHz DDR3 Memory for Late 2013 APPLE Mac Pro - Newegg.com
Mac Pro Quad Core Xeon W3520 2.66 GHz 8GB DDR3 CPU Board A1289 30-4 - All Things Surplus
Amazon.com: OWC 16GB (2 X 8GB) DDR3 1333MHz 240-pin DIMM ECC Memory Compatible with Mac Pro 2009-2012 'Nehalem' & 'Westmere' Models (OWC1333D3W8M16K) : Everything Else
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. (OWC85MP3S9M032K) at Amazon.com
Buy Used & Refurbished 2013 Apple Mac Pro 3.5ghz D300 32 GB RAM 2 TB SSD- Mac Pro
32GB (4x8GB) Mac Pro 4,1 5,1 UPGRADE KIT PC3L-10600 1333MHz DDR3 ECC Memory
4GB 2X2GB RAM Memory for Apple Mac Pro 2.66GHz Quad-Core Xeon (MB871LL/A) DDR3 UDIMM 240pin PC3-8500 1066MHz Black Diamond Memory Module Upgrade - Walmart.com