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Timetec DDR4-2666 8GB Replacement for Synology D4ES01-8 DDR4 ECC Unbuffered SODIMM 2666MHz PC4-21300 260 Pin 1.2V CL19 Memory RAM (Compatible for RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+) at Amazon.com
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4GB Memory for Synology DiskStation DS1815+ DDR3-1600 SODIMM RAM Module (PARTS-QUICK Brand) at Amazon.com
Synology - DDR4 - module - 16 GB - SO-DIMM 260-pin - unbuffered - D4ES01-16G - Server Memory - CDW.com
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Synology Memory Alternative - What do you all think of Arch Memory? Claims compatibility with Synology. Even the new DS1621+ which I have. Anyone had long term experience with this memory? Or
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