Synology D4EC-2666-16G 16GB DDR4 2666 MHz Memory Module
Upgrade your Synology NAS with the D4EC‑2666‑16G 16 GB ECC DDR4‑2666 SO‑DIMM. Certified for SA/RS/UC/FS series—offers data integrity, performance boost, and a 5‑year warranty.
Product Overview
Synology D4EC‑2666‑16G is a genuine 16 GB DDR4‑2666 MHz ECC unbuffered SO‑DIMM engineered specifically for enterprise-grade Synology NAS devices. It delivers critical error correction, high throughput, and firmware compatibility, suitable for models like SA3400D, UC3400, RS3621xs+, and FS3400 series. Comes backed by a 5‑year Synology warranty.
Key Features
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16 GB DDR4‑2666 MHz (PC4‑21300) ECC memory in SO‑DIMM form factor
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ECC (Error-Correcting Code) ensures data integrity and protection against memory errors
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260‑pin unbuffered SO‑DIMM at 1.2 V for compatibility with NAS hardware
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Synology-certified models include SA3400D, SA3200D, UC3400, UC3200, RS/FS series, and select others
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5‑year manufacturer warranty provides long-term reliability
Technical Specifications
Specification | Detail |
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Capacity | 16 GB |
Speed | DDR4‑2666 MHz (PC4‑21300) |
ECC Support | Yes (single‑bit error correction) |
Form Factor | 260‑pin unbuffered SO‑DIMM |
Voltage | 1.2 V |
Warranty | 5 years |
Compatible Models | SA3400D, SA3200D, UC3400, UC3200, RS4021xs+, RS3621xs+, RS3621RPxs, RS2821RP+, RS2421RP+/+, RS1619xs+, RS3618xs, RS2818RP+, RS2418RP+/+, RS4017xs+, RS3617xs+/RPxs |
Why Choose D4EC‑2666‑16G?
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Enterprise-grade stability: ECC and Synology validation ensure robust error detection, perfect for mission-critical environments.
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Maximized compatibility: Designed specifically for Synology NAS firmware (DSM), preventing boot failures and recognition issues .
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Enhanced system performance: Ideal for multitasking, cache optimization, virtualization, and heavy-duty NAS operations.
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Long-term support: Includes a solid 5-year warranty directly from Synology .
FAQs
Q1: Which devices is this module compatible with?
Officially supported on Synology models such as SA3400D/SA3200D, UC3400/UC3200, and multiple RS/FS series units (as listed above).
Q2: Will it work with desktop PCs or non‑Synology systems?
It may physically fit in ECC‑capable desktop motherboards but is optimized and tested only for Synology NAS environments.
Q3: Can I mix it with non‑Synology memory?
No—Synology recommends using identical certified modules to maintain ECC functionality and system stability.
Q4: Why is ECC important?
ECC detects and corrects single-bit memory errors, ensuring data integrity in critical storage applications.
Q5: How do I install it?
Power down the NAS, open the memory slot, insert the SO‑DIMM firmly, then reboot. DSM will detect and activate the new memory.
Q6: What warranty coverage does it offer?
A 5-year limited warranty from Synology covers manufacturing defects and ensures long-term reliability.