AddOn Networks 4GB DDR3-1600 memory module 1 x 4 GB ECC

This HP® 647895-S21 compatible 4GB DDR3-1600MHz single rank Registered ECC 1.5V 240-pin CL11 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 our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. Our products are also guaranteed by the Magnuson-Moss Warranty Act to not affect or void OEM warranties.