United States
Name:
D4RD-2666-16G
- Description:
- 16GB RDIMM ECC RAM DDR4-2666
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- Brand:
- Synology
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Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.
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Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
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Every shipment is delivered directly to your address — regardless of country or carrier.
Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
14-Day Money Back Guarantee
Free 14-Day Returns
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Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
TRUSTED, TRIED, PROVEN
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.
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Pricing for D4RD-2666-16G is available on request. Get immediate quote or for exclusive discounts, opt for bulk quotation for D4RD-2666-16G.
Explore more options from Computer Memory & Ram or explore other Synology products.
D4RD-2666-16G Specifications
| Product Type | Computer Memory |
| Memory Type | DDR4 |
| Capacity | 16 GB |
| Compatible Platforms | Server |
| Compatible Systems | Rack Server |
| Form Factor | RDIMM |
| Kit Configuration | Single Channel |
| Speed | 2666 MHz |
| Operating Temperature | N/A |
| 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 |
| Height | N/A |
| Width | N/A |
| Depth | N/A |
| Weight | N/A |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| AMD Platform Support | AMD EPYC | N/A | N/A | AMD EPYC | N/A |
| Capacity | 32 GB | 4 GB | 8 GB | 16 GB | 8 GB |
| CAS Latency (CL) | CL19 | CL11 | CL11 | CL19 | CL11 |
| Compatible Platforms | Desktop / Laptop / Server | Desktop | Desktop | Server | Desktop |
| Compatible Systems | Rack Server | N/A | N/A | Rack Server | N/A |
| Depth | 0.3 inches | 0.5 inches | N/A | N/A | N/A |
| ECC Support | Yes | No | No | Yes | No |
| Form Factor | RDIMM | UDIMM | UDIMM | RDIMM | UDIMM |
| Heatsink / Heatspreader | Yes | Yes | Yes | No | No |
| Height | 1.2 inches | 1.2 inches | N/A | N/A | N/A |
| Intel Platform Support | Intel Xeon Scalable | N/A | N/A | Intel Xeon Scalable | N/A |
| Kit Configuration | Single Channel | Single Channel | Dual Channel | Single Channel | Dual Channel |
| Memory Type | DDR4 | DDR3 | DDR3 | DDR4 | DDR3 |
| Operating Temperature | N/A | N/A | N/A | N/A | N/A |
| Product Name | D4RD-2666-32G | D3NS1866L-4G | RAM1600DDR3L-8GBX2 | D4RD-2666-16G | RAMEC1600DDR3-4GBX2 |
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Registered/Buffered | Registered | Unbuffered | Unbuffered | Registered | Unbuffered |
| Reliability Rating | High Reliability | Standard | Standard | High Reliability | Standard |
| RGB Lighting | No | No | No | No | No |
| Speed | 2666 MHz | 1866 MHz | 1600 MHz | 2666 MHz | 1600 MHz |
| Use Case | Server | Gaming / Workstation | Gaming | Server | Gaming |
| Voltage | 1.2V | 1.35V | 1.35V | 1.2V | 1.5V |
| Weight | 0.3 lbs | 0.25 lbs | N/A | N/A | N/A |
| Width | 5.3 inches | 5.3 inches | N/A | N/A | N/A |
| XMP Support | No | Intel XMP 2.0 | No | No | No |
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Questions & Answers
Q
What is the capacity and speed of the D4RD-2666-16G module?
A
The D4RD-2666-16G is a 16 GB DDR4 RDIMM ECC memory module rated at 2666 MT/s for high-performance server applications.
Q
Is the D4RD-2666-16G compatible with my server motherboard?
A
This module is compatible with any DDR4 RDIMM ECC–capable motherboard that supports 2666 MT/s speeds and registered ECC memory.
Q
What does ECC support mean for this RAM?
A
ECC (Error-Correcting Code) automatically detects and corrects single-bit memory errors, improving system reliability and uptime in critical environments.
Q
Can I mix the D4RD-2666-16G with non-ECC or UDIMM modules?
A
No, mixing RDIMM ECC modules with non-ECC UDIMMs is not recommended and may cause system instability or prevent booting.
Q
How many ranks does this memory module use?
A
The D4RD-2666-16G is a dual-rank registered DIMM (RDIMM) optimized for balanced performance and capacity.
Q
What voltage does the D4RD-2666-16G operate at?
A
This module operates at the JEDEC standard voltage of 1.2 V, ensuring compatibility and energy efficiency.
Q
Does the D4RD-2666-16G support XMP profiles?
A
No, ECC RDIMM modules follow JEDEC specifications and do not use Intel XMP; they automatically train to the highest supported speed.
Q
What latency timings does the D4RD-2666-16G have?
A
The standard JEDEC CL19-19-19 timing ensures reliable 2666 MT/s performance under server workloads.
Q
Is the D4RD-2666-16G covered by a warranty?
A
Yes, this memory module includes a limited lifetime warranty against manufacturing defects and premature failure.
Q
How do I install the D4RD-2666-16G in my server?
A
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.
Q
Will this module work in a multi-CPU server configuration?
A
Yes, the D4RD-2666-16G is compatible with single- and multi-CPU platforms that support registered ECC DDR4 DIMMs.
Q
Can I upgrade from 8 GB to 16 GB using this module?
A
Yes, you can replace or add this 16 GB module to upgrade capacity, provided slots and motherboard support 16 GB RDIMMs.
Q
What operating temperature range does this RAM support?
A
The D4RD-2666-16G operates reliably between 0 °C and 85 °C, suitable for most data-center environments.
Q
How does registered (buffered) memory benefit performance?
A
Registered memory offloads control signals to a register, reducing electrical load on the memory controller for greater stability with high module counts.
Q
Is this module compatible with Intel and AMD server platforms?
A
Yes, it supports both Intel Xeon and AMD EPYC/Opteron platforms that accept DDR4 RDIMM ECC memory at 2666 MT/s.
Q
Where can I verify the authenticity of my D4RD-2666-16G module?
A
Check the manufacturer’s holographic label, serial number, and QR code against the vendor’s online validation tool for genuine parts.
