647909-B21 - HP Compatible 8GB PC3-10600 DDR3-1333 2Rx8 1.35v ECC UDIMM Compatible With HP Part Number: 647909-B21 8GB PC3-10600 DDR3-1333 2Rx8 1.35v ECC UDIMM For HP Servers only. Not compatible with HP laptops and home computers. Lifetime Warranty Third Party; 100% Compatible