Technical Snapshot

The Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) is a server-grade DDR4 RDIMM memory module designed for enterprise servers and workstations. Running at 2,666 MT/s with CL19 timings at 1.2V, The module provides 16GB of DDR4 memory . Backed by a 5 Years warranty, this module targets server deployments, virtualization hosts, and high-availability computing environments requiring ECC error correction.

Use Case
Server deployments, virtualization, high-availability computing
Compatibility
RDIMM-compatible server motherboard
Category
DDR4 RDIMM — Synology Synology DDR4 ECC RDIMM
SYNOLOGY
Synology RAM
Synology Synology DDR4 ECC RDIMM

Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G)

DDR4 · RDIMM · 2,666 MT/s · 16GB

Memory transfer rate in megatransfers per second. Higher MT/s provides more bandwidth for CPU-bound workloads.
Speed 2,666 MT/s
Total kit capacity across all modules. Dual-channel kits double memory bandwidth.
Capacity 16GB
CAS Latency — the delay between a memory access request and data availability.
Latency CL19
Operating voltage. Higher voltage allows faster speeds but increases power and heat.
Voltage 1.2V
MPND4RD-2666-16G
EAN846504003563
CategoryMemory
Contact for Price
Comparing memory? Open Comparison Tool →

Memory Specifications

Memory TypeDDR4
Form FactorRDIMM
Total Capacity16GB
Speed2,666 MT/s
CAS LatencyCL19
Voltage1.2V
ECCYes
Warranty5 Years

Full Specifications

Data sourced from Synology product specifications
Memory
Product LineSynology DDR4 ECC RDIMM
Memory TypeDDR4
Form FactorRDIMM
Total Capacity16GB
Module Count1
Module Capacity16GB
Speed2,666 MT/s
Timings & Voltage
CAS LatencyCL19
Voltage1.2V
ECCYes
Product
BrandSynology
MPND4RD-2666-16G
EAN846504003563
Warranty5 Years
Physical
Weight0.068 kg
Package Dimensions18.41 x 9.14 x 1.27 cm

Support

Synology Memory Compatibility ToolCheck motherboard compatibility for this module
Synology Support →
Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) DatasheetPDF · Technical specifications
Synology Support →
← Back to Memory Catalog

Related Products

Synology 16GB DDR4-2666 ECC Registered DIMM (D4ER01-16G)
16GB · 2666 MT/s
View Product →
Synology 64GB DDR4-2666 ECC Registered DIMM (D4ER01-64G)
64GB · 2666 MT/s
View Product →
Kingston FURY Impact DDR4 16GB 2666MT/s SODIMM Intel XMP — KF426S15IB1/16
Kingston · 16GB · 2666 MT/s
View Product →
ASUS TUF GAMING B550-PLUS
Compatible AM4 DDR4 Motherboard
View Product →

Frequently Asked Questions

What motherboards are compatible with this memory?

The Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) requires a DDR4-compatible motherboard. Compatible platforms include AMD AM4 (B550, X570, B450, etc.) and Intel LGA 1700 (B660, Z690) or LGA 1200 (B560, Z590). DDR4 is NOT compatible with DDR5 slots — they use different pin configurations.

What speed does this memory run at?

The Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) runs at 2,666 MT/s with CL19 timings. This is a JEDEC standard speed that works automatically without BIOS configuration.

Can I add more memory later?

Yes, the Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) is a single 16GB module. You can add additional compatible DDR4 RDIMM modules to populate empty slots. For best performance, use matched modules of the same speed and capacity to enable dual-channel mode.

Does this memory support ECC error correction?

Yes, the Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) includes ECC (Error-Correcting Code) support, which detects and corrects single-bit memory errors. This is essential for servers, workstations, and mission-critical applications where data integrity is paramount.

What warranty does this memory come with?

The Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G) comes with a 5 Years warranty from Synology.

JSON-LD Structured Data — Product + Breadcrumb
Product: Synology 16GB DDR4-2666 ECC Registered DIMM (D4RD-2666-16G)
MPN: D4RD-2666-16G
Schemas: Product + BreadcrumbList
Properties: 11 additionalProperty entries
Related: 4 isRelatedTo links