Proline - DDR2 - 64 GB: 8 x 8 GB - DIMM 240-pin

This HP 495605-B21 compatible 64GB (8x8GB) DDR2-667MHz dual rank registered ECC 1.8V 240-pin CL5 factory original RDIMM kit 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.