64GB DDR4 2666MHz ECC SO-DIMM Memory Upgrade for Synology NAS

In this review we test the OWC 64GB upgrade kit designed specifically for Synology NAS systems like the RS822+ and RS822RP+. The bottom line: this kit is for users who need a straightforward, compatible memory increase to improve multitasking and caching on a NAS or small server. Installation is usually a simple DIY task, and the pair of 32GB ECC SO-DIMMs provides the biggest practical benefit here - more headroom for virtual machines, containers, and heavy file-serving workloads without changing power or cooling.

Key Features

• Capacity: Two 32GB modules give a combined 64GB of memory to dramatically reduce swapping and improve responsiveness under load.
• Compatibility: Designed to match Synology part numbers such as D4ES0-32G and compatible with DiskStation, RackStation, FlashStation, and NVR DVA Server lines.
• ECC support: Error-correcting code memory helps maintain data integrity on NAS and server workloads that demand stability.
• Form factor and speed: 260-pin DDR4 SO-DIMM at 2666MHz (PC4-21300) provides a balance of density and performance for compact systems.
• Power efficiency: Operates at 1.2V which helps keep thermal and power impact low in small enclosures.
• Warranty and support: Backed by an industry-leading replacement program and limited lifetime warranty with free tech support from the maker.

Who It's For

This upgrade is aimed at Synology owners running the RS822+ or RS822RP+ who want to add more memory for heavier multi-user access, containerized apps, or virtual machines. IT pros and home lab users who need ECC memory for stability will appreciate the compatibility and support.

It is not for users with NAS models that do not accept 260-pin SO-DIMMs or for those seeking the absolute fastest desktop memory; this kit focuses on compatibility and reliability rather than pushing raw latency or frequency extremes.

Pros & Cons

Pros

• High 64GB capacity in a compact SO-DIMM kit that directly increases NAS multitasking capability.
• ECC support improves data integrity for server and NAS workloads where stability matters.
• Direct compatibility with Synology part numbers reduces uncertainty when upgrading supported models.
• Lifetime warranty and free technical support provide extra confidence during installation and use.

Cons

• Limited to 2666MHz speed and CL19 timings, so enthusiasts seeking higher-frequency modules should look elsewhere.
• Compatibility is specific; users must confirm their Synology model supports these 260-pin SO-DIMMs.

Specifications

Kit Capacity	64GB (2 x 32GB)
Memory Type	DDR4 SO-DIMM, 260-pin
Speed	2666MHz (PC4-21300)
Latency / Rank	CL19, 1Rx8
Voltage	1.2V
ECC	ECC Unbuffered
Compatible Models	Synology RS822+, RS822RP+ and other DiskStation/RackStation/FlashStation/NVR DVA Servers

Our Verdict

The OWC 64GB DDR4 ECC SO-DIMM kit is a practical, reliable memory upgrade for Synology RS822+ and RS822RP+ owners who need more capacity for VMs, containers, and heavy NAS workloads. It is well matched for stability and compatibility, backed by a lifetime warranty and support, and represents strong value for those prioritizing proven operation over peak overclocked speeds.

Frequently Asked Questions

Will this kit work in my RS822+ or RS822RP+?
Yes, the kit is built to be compatible with those models and matches Synology part number references, but always check your NAS firmware and model compatibility before installing.

Is installation difficult for a non-technical user?
In most cases installing SO-DIMM memory in a NAS is a straightforward DIY task; OWC provides a basic installation video and free tech support if you need help.

Does this memory provide error correction?
Yes, these modules are ECC unbuffered SO-DIMMs, which provide error correction suitable for server and NAS stability needs.