This HP 647653-081 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. All of our server memory is built to strict JEDEC standards at one of the tier 1 facilities (Samsung, Micron, or Hynix). Our products are also guaranteed by federal law to not affect or void OEM warranties.

• DIMM 16 GB capacity is enough to execute all memory hungry programs simultaneously
• DDR3 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate
• Up to 1333 MHz speed with CL9 latency for playing the latest games and using heavy software