Description The Synology D4ES01-8G is an 8 GB unregistered DDR4 ECC SO-DIMM module designed for Synology DiskStation and RackStation systems. It delivers error-correcting memory to models including DS1621, DS1621XS, DS1821, RS1221 and RS1221RP. The single-rank, 260-pin design fits standard SO-DIMM slots and features ECC support for enhanced data integrity. Its unbuffered architecture ensures compatibility with a wide range of Synology NAS units. Key Features - 8 GB DDR4 SO-DIMM - Unregistered memory with ECC - 260-pin form factor - Compatible with DS1621/DS1621XS/DS1821 and RS1221/RS1221RP - Memory layout: 1 × 8 GB Specifications Brand: Synology Model Number: D4ES01-8G Product Type: Memory module Memory (GB): 8 Compatibility: 21 series: RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+ Unregistered: true Ecc: true Memory Form Factor: 260-pin SO-DIMM Memory Layout: 1 x 8 GB Safety Warnings: Avoid direct contact with electronics to prevent electrostatic damage.
