OWC 4GB DDR4 PC4-21300 2666MHz NON-ECC. Compatibility SYNOLOGY D4NS01-4G. Watch our OWC Basic Installation Video for Help. Capacity 4GB Form Factor 260-PIN SODIMM. ECC Type NON-ECC. Speed PC4-21300 2666MHz CL19 Backward Compatibility ALSO COMPATIBLE WITH 2400MHz AND 2133MHz.
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