Synology - DDR4 - module - 16 GB - DIMM 288-pin - 2666 MHz / PC4-21300 - registered - D4RD-2666-16G - Server Memory - CDW.com
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32GB (2X16GB) DDR4-2666 PC4-21300 ECC SODIMM Compatible with Synology D4ECSO-2666-16G Memory Upgrade Module by NEMIX RAM at Amazon.com
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