Synology - DDR4 - module - 16 GB - DIMM 288-pin - registered - D4ER01-16G - Computer Memory - CDW.com
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A-Tech 32GB (2x16GB) RAM Replacement for Synology D4ECSO-2666-16G, D4ES01-16G | DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V Memory Upgrade for NAS DiskStation, RackStation, FlashStation, & NVR DVA at Amazon.com
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