OWC 32GB Memory RAM Kit Compatible with Synology DiskStation DS723+ DS923+
Bottom line: The OWC 32GB Memory RAM Kit: Ships as a matched 2x16GB kit, no module mixing; main trade-off: fixed at DDR4-2666 PC4-21300 CL19, no faster clocks.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
Pros & Cons
Pros
- ✓ Ships as a matched 2x16GB kit, no module mixing
- ✓ ECC unbuffered SODIMM flags memory errors on 24/7 NAS
- ✓ Limited lifetime warranty plus free OWC tech support
- ✓ Matches Synology D4ECSO-2666-16G and D4ES01-16G part numbers
Cons
- ✗ Fixed at DDR4-2666 PC4-21300 CL19, no faster clocks
- ✗ Third-party RAM, not on Synology's official QVL list
- ✗ Costs more than generic non-ECC DDR4 SODIMM kits
- ✗ Only fits listed Plus/xs models, not entry-level DiskStations
SpecPicks Verdict
SpecPicks scored OWC 32GB Memory RAM Kit using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. OWC's memory & ram lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for memory & ram of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- OWC 32GB UPGRADE: Consists of 2pcs of 16GB DDR4 2666MHz PC4-21300 CL19 2RX8 ECC SO-DIMM 1.2V 260-pin Memory Modules Compatible with Synology part numbers D4ECSO-2666-16G, D4ES01-16G
- Compatible for Synology NAS DiskStation, RackStation, FlashStation, & NVR DVA Servers models: DS1522+, DS1618+, DS1621+, DS1621xs+, DS1819+, DS1821+, DS2419+, DS2419+II, DS2422+, DS3018xs, DS3617xs, DS3617xsII, DS3622xs+, DVA3219, DVA3221, FS1018, RS1221+, RS1221RP+, RS822+, RS822RP+
- INCREASED PERFORMANCE: Memory Upgrades are the Most Effective and Easy Way to Boost the Performance of Your Server, Micro Server or NAS System
- INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing
- EASY INSTALLATION: In Most Cases Installing Memory is an Easy DIY project. Watch our OWC Basic Installation Video for help.
Full Specifications
| Brand | OWC |
|---|---|
| Weight | 16g |
| Voltage | 1.2 volts |
| RAM Size | 32 GB |
| Model Name | 2C6D42R816GB |
| Form Factor | SO-DIMM |
| Memory Speed | 2666 MHz |
| Model Number | OWC2C6D42R8032P |
| Number of Pins | 260 |
| Mfr Part Number | OWC2C6D42R8032P |
| Number of Items | 2 |
| Number of Packs | 2 |
| INDUSTRY LEADING | Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing |
| EASY INSTALLATION | In Most Cases Installing Memory is an Easy DIY project. Watch our OWC Basic Installation Video for help. |
| Memory Generation | DDR4 |
| Compatible Devices | SYNOLOGY DS1618+, SYNOLOGY DS1621+, SYNOLOGY DS1819+, SYNOLOGY DS1821+, SYNOLOGY DS923+ |
| Data Transfer Rate | 2666 MHz |
| Memory Form Factor | SODIMM |
| Additional Features | Ecc, Lightweight |
| Computer Memory Size | 32 GB |
Ready to buy?
OWC 32GB Memory RAM Kit Compatible with Synology DiskStation DS723+ DS923+ is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
Related Memory & RAM
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best 1440p Gaming GPUs in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Best Retro Handhelds in 2026 — From $35 to $500
- How to Build a Windows 98 Retro PC in 2026
More reviews from the SpecPicks archive
Browse all reviews →- Cisco's Open Security LLMs: Local Vulnerability Scanning on an RTX 3060
- Build a Raspberry Pi 4 8GB Starter Home Lab in 2026: BOM + First Services
- Matrox G400 MAX in 2026: Period-Correct Install, EMBM Showcase, and Pentium III Benchmarks
- Active Quake 3 and OpenArena Servers in 2026 — How to Find and Join Them
- Best Storage for a Raspberry Pi 4 Home Server: microSD vs SATA SSD vs NVMe
- Best Gaming Monitor for 2026: 5 Picks from 1440p to 4K
- Zero-CPU-Overhead OV7725 Camera Streaming on RP2350
- Best SSD for Steam Deck OLED Expansion in 2026: SATA Adapter vs M.2 2230
- Best Streaming Starter Kit for New Creators in 2026
- Building a 2001 LAN Party Rig in 2026: GeForce 3, Pentium III, and Period-Correct Peripherals
- Best Budget 1TB SATA SSD 2026: BX500 vs WD Blue vs SanDisk Ultra 3D vs Samsung 870 EVO
- Building a 2002 LAN Party PC: GeForce 4 Ti + Athlon XP
- BOSGAME VTA-439: AMD Ryzen AI 9 HX 470 Mini PC for Linux
- Local Image Generation AI in 2026: AMD Hardware Performance & Setup Guide
- Which LLMs Actually Fit on an RTX 3060 12GB in 2026?
- Ryzen 5 5600G vs Ryzen 7 5700X for a Budget 1080p Gaming Build
- Best 4K Monitor for Reviewing AI-Generated Images on an RTX 3060
- Why a Game Boy Clone Ran Too Fast — and the DIY Fix Makers Are Building
- Athlon 64 + Radeon 9800 Pro Windows XP Build (2026 Revival): CompactFlash-to-IDE Boot Guide
- Can a Local RTX 3060 12GB LLM Debug Linux Boot Like Gemini?
- A Red Hat Engineer Went Back to AMD Ryzen for His Linux Desktop
- The Budget Streaming Starter Kit: Mic, Light, and Webcam Under $250
- Best Streaming Starter Kits in 2026: Mic, Light, Capture, and the One-Box Builds
- Best Gaming Mouse Pads for FPS and MOBA in 2026
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090