Synology D4EC-2666-8G 8GB DDR4 ECC UDIMM NAS

Synology DDR4 ECC UDIMM for RackStation NAS

This 8 GB DDR4-2666 ECC UDIMM is built for Synology RackStation models RS4017xs+, RS3618xs, RS3617xs+, RS3617RPxs and RS1619xs+. It adds error-correcting memory to NAS servers that require data integrity for continuous operation. The module runs at 1.20 V and uses a 288-pin DIMM form factor. Compatibility is limited to the listed RackStation series.

Installation fits 288-pin DDR4 slots on supported

The unbuffered DIMM installs directly into compatible memory slots without registration circuitry. ECC capability protects stored data against single-bit errors during read and write cycles. The 1.20 V operating voltage reduces power draw compared to earlier DDR generations. This module frees the system from relying on non-ECC memory for critical workloads.

Sustained operation benefits from ECC fault

Error checking corrects single-bit errors in real time, preventing silent data corruption during long file transfers or database tasks. The 2666 MHz data rate maintains consistent throughput under continuous load. Lower power consumption reduces thermal output inside the chassis during extended use. The design targets enterprise reliability for always-on NAS deployments.