# Memory module Synology DDR4 4 GB 1 x 4 GB ECC

**URL:** https://aio.lv/en/product--synology-d4es01-4g--3658119
**Data updated:** 2026-01-13 17:45 (EET)
**Category:** Memory (RAM)
**Manufacturer:** SYNOLOGY
**Manufacturer code:** D4ES01-4G
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 331.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 274.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--synology-d4es01-4g--3658119

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

The Synology D4ES01-4G is a 4 GB DDR4 ECC memory module designed for reliable performance. With a layout of 1 x 4 GB, it enhances system stability and data integrity, making it ideal for servers and workstations. The DDR4 technology ensures faster data transfer rates and improved energy efficiency, providing a significant boost to your system's overall performance.

## Long description

The Synology DDR4 4 GB 1 x 4 GB ECC memory module (D4ES01-4G) is a single-module solution intended to increase system stability and support data integrity in compatible Synology systems and other ECC-capable servers or workstations. This 4 GB DDR4 module uses error-correcting code (ECC) to detect and correct common types of internal data corruption, and its DDR4 architecture provides improved data transfer efficiency and lower power consumption compared with older memory generations.
Advantages
The module offers error-correcting capabilities to reduce the risk of data corruption and unexpected crashes, contributing to higher uptime for storage systems and servers. As a DDR4 unit, it supports faster memory clocks and improved throughput while operating at reduced voltage, which can lead to better energy efficiency. The single 4 GB configuration makes it straightforward to add or replace memory in systems that accept ECC DDR4 DIMMs.
Suitable for
Small to medium Synology NAS systems that specify compatible ECC DDR4 memory
Entry-level servers and workstations requiring ECC support
Environments where data integrity and system stability are priorities
Key specifications
Memory capacity: 4 GB
Memory type: DDR4
Form factor: single module (1 x 4 GB)
ECC: error-correcting code support for detection and correction of memory errors
How to use
Before installation, power down the host system and disconnect all power sources. Open the system chassis according to the manufacturer’s instructions and locate the compatible DDR4 ECC memory slot. Align the module with the slot keyed edge and press firmly until the module latches into place. Reassemble the chassis, reconnect power, and boot the system. Confirm the new memory is recognised in the system firmware or operating system memory information screens.
Usage recommendations
Install this Synology 4 GB DDR4 ECC module only in systems that explicitly support ECC DDR4 memory and the specific module form factor. For optimal performance and stability, install memory in matched pairs or follow the system vendor’s guidelines for memory population; consult Synology or your system documentation for compatibility lists before purchase.

## Specifications

### Features

| Feature | Value |
|---|---|
| Internal memory | 4 GB |
| Internal memory type | DDR4 |
| ECC | Yes |
| Memory layout (modules x size) | 1 x 4 |
| Compatible products | 21 series:RS1221RP+, RS1221+, DS1821+, DS1621+ |
| Buffered memory type | Unregistered (unbuffered) |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733020 |

## FAQ

### How much does the Memory module Synology 4 GB D4ES01-4G cost, and is it available for purchase?

The price is 331.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 03.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Memory module Synology 4 GB D4ES01-4G be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All SYNOLOGY products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized SYNOLOGY service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: internal memory, internal memory type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

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