CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation HP/Compaq® Z210 Small Form Factor Non Ecc - A69 at Amazon.com
Kingston Technology ValueRAM 8GB Kit (2x4GB) DDR3 1333 MHz DIMM Desktop Server Memory KVR1333D3E9SK2/8G at Amazon.com
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