OWC 16GB DDR4 PC4-21300 2666MHz ECC. Compatibility SYNOLOGY D4ES03-16G. Watch our OWC Basic Installation Video for Help. Capacity 16GB Form Factor 260-PIN SODIMM. ECC Type ECC. Speed PC4-21300 2666MHz CL19 Backward Compatibility ALSO COMPATIBLE WITH 2400MHz AND 2133MHz.
