Full Details on Amazon.com : http://www.amazon.com/gp/product/B00CA5FF2G?tag=tsukuyomi-208GB (2x4GB) MEMORY RAM COMPATIBLE WITH Dell Precision Workstation T5500 ECC REGISTER DDR3240PIN DIMM DDR3 SDRAM DDR3-PC10600 PC3-1333MHZ 2PCS KIT