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D4EC-2666-16G
16GB RAM UNBUFF ECC ECC DIMM DDR4-2666 260PIN 1.2V
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D4EC-2666-16G is a high-performance DDR4 memory module featuring Error-Correcting Code (ECC) support in a standard UDIMM form factor. Operating at a speed of 2666 MHz with a CAS latency of CL19 and a voltage of 1.2V, this 16 GB module is engineered for high reliability in demanding environments.
Designed for server and workstation builds, D4EC-2666-16G is configured as a single-channel kit without a heatsink or RGB lighting, ensuring compatibility with desktop and rack server platforms. Its unbuffered architecture and robust ECC capability make it ideally suited for data centers and professional applications that require trusted memory performance.
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| D4EC-2666-16G |  D4NESO-2666-4G |  D3NS1866L-4G |  D4NE-2666-4G |  RAMRG2133DDR4-16GB | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR3 | DDR4 | DDR4 |
| Capacity | 16 GB | 4 GB | 4 GB | 4 GB | 16 GB |
| Compatible Platforms | Desktop / Server | Desktop | Desktop | Desktop / Laptop / Server | Desktop |
| Compatible Systems | Rack Server | N/A | N/A | Workstation | N/A |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 2666 MHz | 2666 MHz | 1866 MHz | 2666 MHz | 2133 MHz |
| Operating Temperature | N/A | N/A | N/A | N/A | N/A |
| Reliability Rating | High Reliability | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL19 | CL19 | CL11 | CL19 | CL15 |
| Voltage | 1.2V | 1.2V | 1.35V | 1.2V | 1.2V |
| ECC Support | Yes | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | No | Intel XMP 2.0 | Intel XMP 2.0 | No | Intel XMP 2.0 |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | No | Yes | Yes | Yes | Yes |
| Intel Platform Support | Intel Xeon Scalable | N/A | N/A | Intel 10th Gen | N/A |
| AMD Platform Support | AMD EPYC | N/A | N/A | AMD Ryzen 3000 | N/A |
| Use Case | Server | Gaming | Gaming / Workstation | General Use | Gaming |
| Product Name | D4EC-2666-16G DDR4 ECC UDIMM | D4NESO-2666-4G | D3NS1866L-4G | D4NE-2666-4G | RAMRG2133DDR4-16GB |
| Height | 1.18 inches | 1.4 inches | 1.2 inches | N/A | 1.2 inches |
| Width | 5.28 inches | 5.3 inches | 5.3 inches | N/A | 5.3 inches |
| Depth | 0.13 inches | 0.3 inches | 0.5 inches | N/A | 0.5 inches |
| Weight | 0.15 lbs | 0.22 lbs | 0.25 lbs | N/A | 0.1 lbs |
Consistent 16GB ECC memory performance. This module provides the high-level data integrity required for our enterprise server systems.
Reliable throughput and perfect compatibility. It effectively handles our server workloads with professional-grade efficiency and complete stability.
Exceptional build quality and dependable 2666MHz speed. A critical component for maintaining high uptime in our data center.
Robust ECC RAM with excellent mechanical stability. It ensures consistent performance for our mission-critical applications and storage.
Top-tier reliability for professional servers. This memory module significantly improves our system's overall multitasking and data processing.
SKU D4EC-2666-16G identifies a 16 GB DDR4-2666 unbuffered ECC UDIMM with 260 pins operating at 1.2 V.
ECC (Error-Correcting Code) automatically detects and corrects single-bit memory errors to improve data integrity and system stability.
This module is unbuffered (UDIMM), meaning it connects directly to the memory controller for lower latency in workstations and servers.
Motherboards with DDR4 ECC UDIMM slots and chipset support—typically Intel Xeon or AMD EPYC platforms—are compatible.
Power off the system, align the notch, press the module into the DIMM slot until the latches click, then power on.
DDR4-2666 offers 21 333 MT/s throughput, delivering improved data bandwidth and responsiveness for memory-intensive applications.
Mixing ECC and non-ECC modules is not recommended; the system will default to non-ECC mode and lose error-correction features.
This DDR4-2666 ECC UDIMM operates at a standard voltage of 1.2 V for optimized power efficiency and thermal performance.
Yes, it can auto-negotiate to lower JEDEC speeds (e.g., 2133 MT/s) if the motherboard or CPU does not support 2666 MT/s.
Typical latency for DDR4-2666 ECC UDIMM is CL19-19-19 at 1.2 V, balancing speed and stability in server environments.
Most platforms auto-detect ECC modules; if necessary, enable ECC support in the BIOS under memory or advanced chipset settings.
Use system diagnostics tools or BIOS memory tests that report ECC error detection and correction status during POST.
Modern server and workstation OSs—such as Windows Server, Linux distributions, and VMware ESXi—fully support ECC memory.
The module is backed by a limited lifetime warranty against defects in materials and workmanship.
Most dual- or quad-channel configurations support one or two UDIMMs per channel; consult your motherboard manual for optimal population.
No heat spreader is required; this unbuffered ECC UDIMM is designed for standard server airflow and thermal conditions.