This HP 647901-B21 compatible 16GB DDR3-1333MHz Dual Rank Registered ECC 1.35V 240-pin CL9 factory original RDIMM 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 federal law to not affect or void OEM warranties.
WARNING: Products with exposed solder can expose you to lead and lead compounds, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Always wash your hands after handling and avoid inhalation of fumes if heating the solder. For more information go to www.P65Warnings.ca.gov.