United States
Trusted by the Highest-Stakes Buyers
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
D4RD-2666-16G
Original Stock
Ready to Ship
16GB RDIMM ECC RAM DDR4-2666
FEATURED DEAL
Featured Deal
Hand-picked by our procurement team for standout value. This unit is offered at our sharpest price on current stock, verified against live market rates.
Name:
D4RD-2666-16G
- Description:
- 16GB RDIMM ECC RAM DDR4-2666
- Rating:
Added to cart 28 times recently
- Availability:
2 In stock - Ready to Ship
- Brand:
- Synology
- Condition:
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
100% Genuine Guaranteed
Global Delivery
Business Terms / PO Accepted
3 Year Extended Warranty
Same-day Shipping
30-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
30-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
Built Global. Stocked Local.
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
4Global Offices
25+Distribution Points
100+Countries Served
Buyer Protection on Every Order
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
Verified By Federal Bodies
Every registration we claim is public record — check our federal contractor status yourself before you spend a dollar.
- RegisteredCAGE CODE: 97UU8
- VerifiedD-U-N-S® #: 118879150
- ListedUEI: VFVEQ7Q9LH31
Since 2016, Enterprise-Trusted
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
10+Years Operating
20,000+Clients Served
150K+SKUs Available
D4RD-2666-16G Overview
D4RD-2666-16G is a DDR4 Registered DIMM engineered for high-performance server environments, delivering a speed of 2666 MHz with a CAS latency of CL19 and operating at 1.2V. This 16GB single module features ECC support and registered buffering, ensuring robust error correction and enhanced reliability for mission-critical applications.
D4RD-2666-16G is primarily compatible with server platforms, including rack server installations, and supports leading Intel Xeon Scalable and AMD EPYC systems. With no integrated heatspreader or RGB lighting, it is optimized for data center and enterprise server builds where stability and dependable performance are paramount.
D4RD-2666-16G price is is available on request. Get immediate quote.
Request bulk order quote for D4RD-2666-16G for additional pricing. Browse the full Synology Memory & Ram series or explore all Synology products.
D4RD-2666-16G Specifications
- Product Type
- Computer Memory
- Brand
- Synology
- Memory Type
- DDR4
- Capacity
- 16 GB
- Compatible Platforms
- Server
- Compatible Systems
- Rack Server
- Form Factor
- RDIMM
- Kit Configuration
- Single Channel
- Speed
- 2666 MHz
- Reliability Rating
- High Reliability
- CAS Latency (CL)
- CL19
- Voltage
- 1.2V
- ECC Support
- Yes
- Registered/Buffered
- Registered
- XMP Support
- No
- RGB Lighting
- No
- Heatsink / Heatspreader
- No
- Intel Platform Support
- Intel Xeon Scalable
- AMD Platform Support
- AMD EPYC
- Use Case
- Server
- Product Name
- D4RD-2666-16G
Speak To a Hardware Specialist in Your Region
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
Product Comparison Table 
| D4RD-2666-16G |  RAMEC1600DDR3-4GBX2 |  D4RD-2666-32G |  D3NS1866L-4G |  RAM1600DDR3L-8GBX2 | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR3 | DDR4 | DDR3 | DDR3 |
| Capacity | 16 GB | 8 GB | 32 GB | 4 GB | 8 GB |
| Compatible Platforms | Server | Desktop | Desktop / Laptop / Server | Desktop | Desktop |
| Form Factor | RDIMM | UDIMM | RDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Dual Channel | Single Channel | Single Channel | Dual Channel |
| Speed | 2666 MHz | 1600 MHz | 2666 MHz | 1866 MHz | 1600 MHz |
| Reliability Rating | High Reliability | Standard | High Reliability | Standard | Standard |
| CAS Latency (CL) | CL19 | CL11 | CL19 | CL11 | CL11 |
| Voltage | 1.2V | 1.5V | 1.2V | 1.35V | 1.35V |
| ECC Support | Yes | No | Yes | No | No |
| Registered/Buffered | Registered | Unbuffered | Registered | Unbuffered | Unbuffered |
| XMP Support | No | No | No | Intel XMP 2.0 | No |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | No | No | Yes | Yes | Yes |
| Use Case | Server | Gaming | Server | Gaming / Workstation | Gaming |
| Product Name | D4RD-2666-16G | RAMEC1600DDR3-4GBX2 | D4RD-2666-32G | D3NS1866L-4G | RAM1600DDR3L-8GBX2 |
Compliance & Warranty
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
L
Lukas Graham
5
Reliable 16GB RDIMM for enterprise servers. The ECC functionality ensures high data integrity for our mission-critical apps.
I
Ivy Sinclair
5
Consistent 2666MHz speed and perfect compatibility. This module provides the professional stability required for our server workloads.
R
Roman Pierce
5
Exceptional build quality and dependable throughput. A trustworthy choice for maintaining high performance in our data center.
S
Sloane Hunter
5
Robust ECC memory with excellent mechanical stability. It effectively handles our data-intensive tasks with high efficiency and reliability.
T
Tobias Grant
5
Top-tier reliability for professional servers. This RDIMM significantly improves our system's overall data processing and multitasking capabilities.
Questions & Answers
What is the capacity and speed of the D4RD-2666-16G module?
The D4RD-2666-16G is a 16 GB DDR4 RDIMM ECC memory module rated at 2666 MT/s for high-performance server applications.
Is the D4RD-2666-16G compatible with my server motherboard?
This module is compatible with any DDR4 RDIMM ECC–capable motherboard that supports 2666 MT/s speeds and registered ECC memory.
What does ECC support mean for this RAM?
ECC (Error-Correcting Code) automatically detects and corrects single-bit memory errors, improving system reliability and uptime in critical environments.
Can I mix the D4RD-2666-16G with non-ECC or UDIMM modules?
No, mixing RDIMM ECC modules with non-ECC UDIMMs is not recommended and may cause system instability or prevent booting.
How many ranks does this memory module use?
The D4RD-2666-16G is a dual-rank registered DIMM (RDIMM) optimized for balanced performance and capacity.
What voltage does the D4RD-2666-16G operate at?
This module operates at the JEDEC standard voltage of 1.2 V, ensuring compatibility and energy efficiency.
Does the D4RD-2666-16G support XMP profiles?
No, ECC RDIMM modules follow JEDEC specifications and do not use Intel XMP; they automatically train to the highest supported speed.
What latency timings does the D4RD-2666-16G have?
The standard JEDEC CL19-19-19 timing ensures reliable 2666 MT/s performance under server workloads.
Is the D4RD-2666-16G covered by a warranty?
Yes, this memory module includes a limited lifetime warranty against manufacturing defects and premature failure.
How do I install the D4RD-2666-16G in my server?
Power off the system, press down c-clips on the memory slot, align the keyed notch, insert the RDIMM fully until clips snap closed, then power on.
Will this module work in a multi-CPU server configuration?
Yes, the D4RD-2666-16G is compatible with single- and multi-CPU platforms that support registered ECC DDR4 DIMMs.
Can I upgrade from 8 GB to 16 GB using this module?
Yes, you can replace or add this 16 GB module to upgrade capacity, provided slots and motherboard support 16 GB RDIMMs.
What operating temperature range does this RAM support?
The D4RD-2666-16G operates reliably between 0 °C and 85 °C, suitable for most data-center environments.
How does registered (buffered) memory benefit performance?
Registered memory offloads control signals to a register, reducing electrical load on the memory controller for greater stability with high module counts.
Is this module compatible with Intel and AMD server platforms?
Yes, it supports both Intel Xeon and AMD EPYC/Opteron platforms that accept DDR4 RDIMM ECC memory at 2666 MT/s.
Where can I verify the authenticity of my D4RD-2666-16G module?
Check the manufacturer’s holographic label, serial number, and QR code against the vendor’s online validation tool for genuine parts.