HP Compatible 16GB PC3-8500 DDR3-1066 4Rx4 1.5v ECC Registered RDIMM (HP PN# 500207-071) Compatible With HP Part Number: 500207-071 16GB PC3-8500 DDR3-1066 4Rx4 1.5v ECC Registered RDIMM For HP Servers only. Not compatible with HP laptops and home computers. Lifetime Warranty Third Party; 100% Compatible