AddOn - DDR3 - 4 GB - DIMM 240-pin - unbuffered

This HP NL797AA compatible 4GB DDR3-1333MHz Dual Rank Unbuffered ECC 1.35V 240-pin CL9 factory original UDIMM 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 memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. The products are also guaranteed by federal law to not affect or void OEM warranties.