Dell W9DD2 - 2GB (1x2GB) 1066Mhz PC3-8500E DDR3-1066 240-Pin ECC Server Ram Memory - CPU Medics
12GB [3x4GB] DDR3-1333 (PC3-10600E) ECC Server Ram Memory Upgrade Kit for The Dell Precision T4500 (Genuine A-Tech Brand) at Amazon.com
8GB Server Memory, 8GB PC3 10600R DDR3 1333MHZ 2Rx4 ECC REG 240Pin Computer Memory Components Server Ram Support Dual/Single CPU Motherboard at Amazon.com