NEMIX RAM 16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM Compatible with Synology D4ES01-16G NAS Memory

EXACT-MATCH UPGRADE — 16GB (1X16GB) DDR4-2666 (PC4-21300), 2Rx8, 1.2V, CL19, 260-pin SODIMM. The memory your Synology or compatible NAS needs, matched to your unit so it's recognized in full and runs reliably. VERIFIED FITMENT — Direct replacement for D4ES01-16G. The 260-pin SODIMM form factor for NAS units and compact systems that take laptop-style memory — not a desktop DIMM. Check your unit's supported memory and capacity before ordering. REAL-WORLD SPEEDUP — More memory means smoother multitasking and more headroom for apps, containers, and concurrent connections — steadier performance when your NAS is under load. CHECK YOUR CONFIG — NAS memory support varies by model. Check your unit's compatibility list and supported capacity in the manual or maker's spec page before purchase. LIFETIME SUPPORT — Backed by a lifetime replacement warranty and free US-based technical support.