Two (2) HP 689911-071 8GB 2Rx4 PC3-12800R 1600MHz DDR3 ECC RDIMMs for a total of 16GB. This is Server Memory, ECC RDIMMs, bus speed PC3-12800 (DDR3-1600). please be sure it works for your application before purchasing. I have 2 pairs for sale. Made by Micron for HP in the USA (Puerto Rico).
eBay