This HP 647651-081 compatible 8GB DDR3-1600MHz single rank registered ECC 1.5V 240-pin CL11 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 8 GB of memory makes a perfect symmetry with your latest model processor and boosts up your computer's performance
• DDR3 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate
• Up to 1600 MHz speed with Registered signal and CL11 latency for smooth computer performance