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D3NS1866L-4G
SYNOLOGY 4GB RAM MODULE DDR3L RAM COMPATIBLE WITH DS620SLIM
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D3NS1866L-4G is a DDR3 UDIMM memory module operating at 1866 MHz with a CAS latency of CL11 and a low-voltage rating of 1.35V. It comes in a 4 GB capacity configured as a single-channel kit, is non‐ECC and unbuffered, and is designed primarily for desktop platforms.
Built with an integrated heatspreader for efficient thermal management, D3NS1866L-4G is engineered for high-performance gaming and workstation builds. Its design emphasizes reliability and stability in demanding computing environments while foregoing RGB lighting for a sleek, performance-focused profile.
D3NS1866L-4G price is is available on request. Get immediate quote.
Request bulk order quote for D3NS1866L-4G for additional pricing. Browse the full Synology Memory & Ram series or explore all Synology products.
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| D3NS1866L-4G |  D4EC-2666-8G |  RAMEC1600DDR3-8GBX2 |  D4NE-2666-4G |  RAM1600DDR3L-8GBX2 | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR3 | DDR4 | DDR3 | DDR4 | DDR3 |
| Capacity | 4 GB | 8 GB | 16 GB | 4 GB | 8 GB |
| Compatible Platforms | Desktop | Desktop / Laptop / Server | Desktop | Desktop / Laptop / Server | Desktop |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Dual Channel | Single Channel | Dual Channel |
| Speed | 1866 MHz | 2666 MHz | 1600 MHz | 2666 MHz | 1600 MHz |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL11 | CL19 | CL11 | CL19 | CL11 |
| Voltage | 1.35V | 1.2V | 1.5V | 1.2V | 1.35V |
| ECC Support | No | Yes | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | Intel XMP 2.0 | No | No | No | No |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | No | No | Yes | Yes |
| Use Case | Gaming / Workstation | Server | General Use | General Use | Gaming |
| Product Name | D3NS1866L-4G | D4EC-2666-8G | RAMEC1600DDR3-8GBX2 | D4NE-2666-4G | RAM1600DDR3L-8GBX2 |
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.
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.
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.
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.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reliable 4GB DDR3L module for our NAS. Perfect compatibility and consistent performance for our network storage system.
Consistent 1866MHz speed and stable operation. It provides the dependable throughput required for our high-traffic file sharing.
Excellent build quality and simple installation. This memory module effectively maintains the efficiency of our professional NAS hardware.
Trustworthy performance for mission-critical storage. It ensures smooth data access and stable operation for our small office network.
Professional grade RAM with rock-solid reliability. A perfect fit for expanding the memory capacity of our compatible servers.
The Synology D3NS1866L-4G module provides 4 GB of DDR3L memory, ideal for enhancing DS620slim performance.
Yes. The D3NS1866L-4G is officially designed and fully compatible with the Synology DS620slim NAS.
It is a 204-pin DDR3L-1866 MHz SO-DIMM module, delivering low-voltage (1.35 V) high-speed operation.
Yes. The D3NS1866L-4G module features ECC technology to detect and correct single-bit memory errors.
Mixing different modules is not recommended. For optimal stability, install identical Synology modules.
The DS620slim has two SO-DIMM slots and supports up to two D3NS1866L-4G modules (8 GB total).
The module operates at 1.35 V, reducing power consumption and heat generation.
Power off the NAS, remove the cover, insert the module into an empty SO-DIMM slot until it clicks, then replace the cover and power on.
Yes. Increasing memory capacity enhances multitasking, application responsiveness, and overall system stability.
Yes. Synology provides a five-year limited warranty for the D3NS1866L-4G module.
The module functions reliably within 0 °C to 40 °C (32 °F to 104 °F) ambient temperature.
Yes. The DS620slim supports user-upgradeable memory; no professional service is required.
Yes. It also works with select Synology models that use DDR3L-1866 SO-DIMM, as listed in Synology’s compatibility guide.
It is factory-tested and validated by Synology for full compatibility, ECC support, and backed by Synology’s warranty.
Order directly from Synology’s online store or authorized resellers to ensure authenticity and warranty coverage.
Ensure the module is fully seated, update DSM to the latest version, and verify compatibility in Synology’s RAM guide.
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