OWC 4.0GB PC14900 DDR3 1866MHz ECC Memory Module at MacSales.com
Used HP Additional 4GB 1866 MHz DDR3 ECC RAM Memory E2Q91AT B&H
HP 2GB (1x2GB) DDR3-1600 MHz ECC RAM at Amazon.com
Samsung 16GB DDR3-1600 ECC Registered Server Memory M393B2G70QH0-CK0 at Amazon.com
8GB PC RAM MODULE DDR3 1066MHZ PC3-8500 UNBUFFERED ECC 1.5V 512X8 CL7 INTEGRAL VALUE
ECC U-DIMM DDR3 server memory module │TEAMGROUP
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
JGGRT Dell | Used & Refurbished
DDR3 ECC DIMMs (Low Voltage) | - Transcend Information, Inc.