Best RAM for Synology NAS (2026)
Upgrading RAM is the fastest way to boost Synology NAS performance. Whether you’re running Plex, Docker containers, or managing surveillance footage, finding the right DDR4 SO-DIMM module is crucial.
This guide compares budget, mid-range, and premium RAM options compatible with Synology’s popular models.
What RAM Does Synology Need?
Form factor: DDR4 SO-DIMM (Small Outline DIMM)
Speed: 2666 MHz or 3200 MHz
Capacity: 4GB, 8GB, 16GB, 32GB modules
Type: Non-ECC (consumer models) or ECC (enterprise models)
Check your Synology model’s manual to confirm maximum supported capacity and speed.
Budget Option: Kingston ValueRAM
Best value for money. Kingston ValueRAM is the workhorse choice — reliable, affordable, and widely compatible.
| Capacity | Speed | Price Range | Best For |
|---|---|---|---|
| 4GB | 2666 MHz | £15–20 | Basic upgrades from 2GB baseline |
| 8GB | 2666 MHz | £25–35 | Plex, Docker, small workloads |
| 16GB | 3200 MHz | £50–65 | High-performance systems |
Buy Kingston ValueRAM on Amazon
Pros: Cheap, reliable, trusted by Synology community.
Cons: Slower than premium options, lower warranty (often 1-year).
Mid-Range: Crucial DDR4
Crucial is the sweet spot for most Synology users. Better performance than ValueRAM, excellent warranty (lifetime), and still affordable.
| Capacity | Speed | Price Range | Best For |
|---|---|---|---|
| 4GB | 2666 MHz | £18–25 | Small upgrades |
| 8GB | 3200 MHz | £30–45 | Standard Plex/Docker setups |
| 16GB | 3200 MHz | £55–75 | Power users, VM workloads |
| 32GB | 3200 MHz | £100–140 | Enterprise use (DS1821+) |
Pros: Lifetime warranty, faster speeds, excellent reliability track record.
Cons: Slightly more expensive than Kingston.
Premium Option: Corsair
For users demanding maximum speed and performance. Corsair modules run at 3200 MHz or higher and include generous warranties.
| Product | Capacity | Price |
|---|---|---|
| Corsair Vengeance | 16GB, 32GB | £60–150 |
Buy Corsair Vengeance on Amazon
ECC vs Non-ECC: Do You Need It?
Non-ECC (standard): Sufficient for home users, small offices, and Plex servers. Cheaper, widely available.
ECC (Error-Correcting Code): Detects and corrects memory errors automatically. Recommended for enterprise Synology models (RS, DS1800+ series) running databases or surveillance systems. Costs 10–15% more.
For most Synology users, non-ECC is fine. Only upgrade to ECC if running mission-critical applications.
How to Check Your Synology Max RAM
- Power off your Synology
- Open the chassis (usually 2–4 screws)
- Locate the RAM slot(s)
- Check the manual or Synology’s website for your model’s maximum supported capacity
- Purchase modules matching that capacity
Recommended Products
| Product | Capacity | Speed | Link |
|---|---|---|---|
| Kingston ValueRAM | 8GB | 2666 MHz | Buy on Amazon |
| Crucial CT8G4SFS632A | 8GB | 3200 MHz | Buy on Amazon |
| Crucial CT16G4SFS632A | 16GB | 3200 MHz | Buy on Amazon |
| Crucial CT32G4SFS632A | 32GB | 3200 MHz | Buy on Amazon |
| Corsair Vengeance | 16GB | 3200 MHz | Buy on Amazon |
| Samsung M471B5273DH0 | 4GB | 3200 MHz | Buy on Amazon |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
Related Synology Upgrade Guides
- Synology RS4021xs+
- Synology RS2423RP+
- Synology RS3621xs+
- Synology RS2423+
- Synology FlashStation FS6400
- Synology Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
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How we verify this guide
We cross-reference compatibility figures against manufacturer specifications where available, official service manuals, and the standards that govern fit — memory type and speed (DDR4 / DDR5 / LPDDR5), maximum supported capacity and slot count, SSD form factor and interface (M.2 2280, NVMe PCIe vs SATA, keying), and charger wattage and connector (USB-C Power Delivery, GaN). We’re explicit about soldered or non-upgradeable parts, prioritise primary sources over retailer listings, and re-verify the data on a regular cycle. More on our method →
