Upgrade the memory in your compatible NAS server with the 16GB DDR4 2666 MHz ECC SO-DIMM Memory Module from Synology. This single RAM module features
D4ECSO-2666-16G DDR4 ECC SO-DIMM 2666 Memory for Synology DiskStation DS1621+ (3rd Party)
16GB DDR4 PC4-21300 ECC SODIMM (Synology D4ECSO-2666-16G Equivalent) Memory RAM
16GB AM-D4ES01-16G 260-Pin DDR4 2666MHz ECC So-dimm RAM
Synology Replacement Memory - DDR4 ECC/RDIMM RAM
16GB 2x 8GB PC4-2666 ECC SODIMM Synology RS1221+ RS1221RP+ Memory RAM
M474A2K43BB1-CTDQ SAMSUNG DDR4-2666 16GB ECC SO-DIMM For Laptop Synolo
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Synology RAM DDR4-2666 ECC SO-DIMM 16GB Compatibility - Applied Models: 21 series: RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+, DVA3221; 20
Synology SODIMM ECC RAM DDR4-2666 16GB (D4ECSO-2666-16G)
NEMIX Ram 16GB DDR4 2666MHz PC4-21300 ECC SODIMM Compatible with Synology DiskStation DS2419+II
Synology 16GB DDR4 SO-DIMM ECC Memory Module D4ES01-16G B&H
16GB AM-D4ES01-16G Memory for Synology RS822RP+ NAS Systems | DDR4 2666MHz ECC SO-DIMM Ram
Synology Certificated SK Hynix 16GB DDR4 2666Mhz ECC SODIMM Server Memory Ram For Synology DS1621+