HP Compatible 8GB PC3-8500 DDR3-1066 2Rx4 1.5v ECC Registered RDIMM (HP PN# 500206-071) Compatible With HP Part Number: 500206-071 8GB PC3-8500 DDR3-1066 2Rx4 1.5v ECC Registered RDIMM For HP Servers only. Not compatible with HP laptops and home computers. Lifetime Warranty Third Party; 100% Compatible