OWC 4GB DDR4 PC4-17000 2133MHz NON-ECC. Compatibility QNAP RAM-4GDR4K0-SO-2133. Watch our OWC Basic Installation Video for Help. Capacity 4GB Form Factor 260-PIN SODIMM. Speed PC4-17000 2133MHz CL15 Backward Compatibility ALSO COMPATIBLE WITH DDR4 1866MHz.
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