HP Compatible 8GB PC3-12800 DDR3-1600 2Rx8 1.5v ECC UDIMM (HP PN# 669239-081) Compatible With HP Part Number: 669239-081 8GB PC3-12800 DDR3-1600 2Rx8 1.5v ECC UDIMM For HP Servers only. Not compatible with HP laptops and home computers. Lifetime Warranty Third Party; 100% Compatible