Synology 4GB D4EU01-4G DDR4 ECC UDIMM Memory Module
Upgrade your Synology storage with the D4EU01‑4G ECC DDR4 2666 MHz UDIMM. Synology-certified for RS2421+/RP+ & RS2821RP+; boosts data integrity with error correction and includes a 5‑year warranty.
Product Overview
Synology D4EU01‑4G is a 4 GB DDR4‑2666 MHz ECC unbuffered DIMM, purpose-built for select Synology RackStation and FlashStation systems. It enhances memory capacity, helps maintain system stability through Error-Correcting Code, and integrates seamlessly with Synology’s DSM and support services.
Key Features
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4 GB DDR4‑2666 (PC4‑21300)
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ECC (Error‑Correcting Code) for improved data stability.
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288‑pin UDIMM, 1.2 V
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Synology-certified for RS2821RP+, RS2421RP+, RS2421+ models.
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5‑year limited warranty for peace of mind.
Technical Specifications
| Specification | Details |
|---|---|
| Capacity | 4 GB |
| Speed | DDR4‑2666 MHz (PC4‑21300) |
| ECC Support | Yes |
| Form Factor | 288‑pin UDIMM |
| Voltage | 1.2 V |
| Warranty | 5 years |
| Compatible NAS | RS2821RP+, RS2421RP+, RS2421+ |
Why Choose D4EU01‑4G?
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Guaranteed reliability – Synology-validated memory module designed to work flawlessly with compatible NAS hardware.
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Data integrity focus – ECC helps detect and correct memory errors during continuous operation.
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Boosts performance – Additional memory improves multitasking, caching, and app responsiveness in DSM.
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Long-term assurance – Comes with a five-year manufacturer warranty.
Frequently Asked Questions
Q1: Which Synology models support this module?
Compatible with RS2821RP+, RS2421RP+, and RS2421+, ensuring seamless integration and memory recognition.
Q2: Can it be used in PCs or non‑Synology servers?
It is engineered for Synology devices. While it fits standard ECC-compatible boards, full compatibility and support apply only in validated Synology models.
Q3: Why ECC memory?
ECC detects and corrects single-bit errors—crucial for preventing data corruption in storage environments.
Q4: Is performance improved?
Yes—boosts multitasking, file transfers, virtual machine workloads, and DSM package responsiveness.
Q5: Can it be mixed with other modules?
No—Synology recommends installing identical memory modules to maintain optimal ECC operation. Newegg.com+8Synology+8B&H Photo Video+8
Q6: How is it installed?
Power down your NAS, open the DIMM slot, insert the module firmly, reboot—DSM will detect the upgrade automatically.
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