Samsung M393B1K70DH0-CK0 8GB Server DIMM DDR3 PC12800(1600) REG ECC 1.5v 2RX4 240P 1024MX72 512mX4 C at Amazon.com
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
Vengeance Performance Memory Kit at Amazon.com
CMS 32GB (2X16GB) DDR3 12800 1600MHz ECC Registered DIMM Memory Ram Upgrade Compatible with IBM® System X3500 M4 (E5-2600 V2) 7383-Xxx for Server Only - B17 at Amazon.com