Need to upgrade your Synology DS1621+ RAM Upgrade Guide? This compatibility guide covers RAM upgrades, NVMe cache SSDs, and compatible hard drives for the Synology DS1621+ RAM Upgrade Guide. Upgrading your NAS memory can significantly improve performance, especially for Docker containers, virtual machines, and heavy file indexing. Check current RAM prices on Amazon.
Synology DS1621+ RAM Upgrade Guide Specifications
| Component | Specification |
|---|---|
| Brand | Synology |
| Memory Type | DDR4 ECC/Non-ECC SO-DIMM |
| Memory Slots | 1-2 (model dependent) |
| Maximum RAM | Up to 32GB (varies by model) |
| Cache SSD Slots | M.2 2280 NVMe |
| Drive Bays | Varies by model |
RAM Upgrade Options

Upgrading the RAM in your Synology DS1621+ RAM Upgrade Guide is one of the best investments for improving NAS performance. More memory allows better caching, faster file indexing, and the ability to run more background services simultaneously.
| Capacity | Type | Best For |
|---|---|---|
| 4GB | DDR4 SO-DIMM | Basic file storage |
| 8GB | DDR4 SO-DIMM | Recommended for most users |
| 16GB | DDR4 SO-DIMM | Docker & VMs |
| 32GB | DDR4 SO-DIMM | Heavy virtualisation |
NVMe Cache SSD
Adding an NVMe cache SSD to your Synology DS1621+ RAM Upgrade Guide dramatically improves read/write speeds for frequently accessed files. Synology NAS devices support M.2 2280 NVMe drives for SSD caching. We recommend checking compatible NVMe cache SSDs on Amazon.
Top pick: The WD Red SN700 500GB is purpose-built for NAS caching with high endurance ratings.
Compatible Hard Drives
For bulk storage, use NAS-rated hard drives designed for 24/7 operation. These drives are optimised for RAID environments and have higher reliability than desktop drives.
- WD Red Plus — Best value NAS drive
- Seagate IronWolf — Excellent reliability
- WD Red Pro — For demanding workloads
Upgrade Difficulty
RAM upgrades on Synology NAS devices are straightforward. Most models have an easily accessible RAM slot on the bottom or side of the unit. You typically need to remove 2-4 screws to access the memory slot. NVMe cache SSD installation is similarly simple on models with dedicated M.2 slots.
Frequently Asked Questions
Can I upgrade the RAM in my Synology DS1621+ RAM Upgrade Guide?
Yes, most Synology NAS devices including the Synology DS1621+ RAM Upgrade Guide support user-upgradeable RAM. Check the number of available slots for your specific model.
What RAM does the Synology DS1621+ RAM Upgrade Guide use?
The Synology DS1621+ RAM Upgrade Guide uses DDR4 SO-DIMM memory. Always use compatible modules from the vendor QVL (Qualified Vendor List) for guaranteed compatibility.
Does the Synology DS1621+ RAM Upgrade Guide support NVMe cache?
Many Synology NAS models support NVMe M.2 2280 SSDs for read/write caching. This significantly improves performance for frequently accessed files.
What hard drives work with the Synology DS1621+ RAM Upgrade Guide?
The Synology DS1621+ RAM Upgrade Guide supports standard 3.5″ SATA hard drives. We recommend NAS-rated drives like the WD Red Plus or Seagate IronWolf for reliability and 24/7 operation.
How much RAM do I need for my NAS?
For basic file storage, 2-4GB is sufficient. For Docker, VMs, or Plex transcoding, 8-16GB is recommended. Heavy virtualisation workloads benefit from 16-32GB.
Recommended Products
- RAM for Synology DS1621+ RAM Upgrade Guide — Compatible memory modules
- NVMe Cache SSD for Synology DS1621+ RAM Upgrade Guide — Boost read/write speeds
- Hard Drives for Synology DS1621+ RAM Upgrade Guide — NAS-rated storage
Related Guides
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- Synology Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.






