This HP 647879-S21 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.

• Allow convenient and fast access to the stored information your computer is actively using for maximum efficiency
• Up to 1600 MHz speed for smooth computer performance
• RDIMM 8 GB of memory makes a perfect symmetry with your latest model processor and boosts up your computer's performance
• DDR3 SDRAM operates at an effective bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation
• 1 x 8GB modules for dependable storage efficiency and maximum convenience
• 240-pin for faster, dependable performance and better access to data and information
• CL11 CAS latency for quicker access to the required location in a timely efficient manner
• Server device support for your RAM Module to allow enhanced system performance and reliable memory solution
• RDIMM form factor with 240-pin and 8 GB memory size for enhanced performance and speed to allow maximum usability
• Registered signal processing allows high speed and accuracy to allow maximum reliability