This HP H2P65ET compatible 8GB DDR3-1600MHz Dual Rank Unbuffered 1.5V 204-pin CL11 SODIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. SpecificationsCAS Latency: CL11Compatible OEM: HPCompatible With OEM Part Number(s): B4U40AT, B4U40AA, 670034-001, 689374-001, H2P65AA, H2P65ET#ABH, H2P65AA#AC3, H2P65UT#ABA, B4U40AT#ABU, H2P65ET#ABB, B4U40AAR#ABH, H2P65ET#AC3, H2P65AA#ABA, B4U40AA#ABH, H2P65AA#ABH, H2P65ETDIMM Type: UnbufferedError Correction: NoForm Factor: SODIMMMemo