Synology NAS RAM Compatibility Log for DSM Models
Table of Contents
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Dataset Overview
This document presents a comprehensive log of RAM memory tests across a wide range of Synology NAS models and DSM versions. Each entry records the timestamp, NAS model, DSM version, memory brand, memory module model/part number, number of modules tested, total system memory (GB), whether the RAM worked, any UI warnings about unofficial memory, notes from testers (including Reddit, Lemmy, X, or Bluesky handles), vendor, country, DMI decode snippet, ECC status, and memory module specifics (size, speed, DDR, rank, and module type).
The dataset captures:
- Memory brands such as Kingston, Crucial, Corsair, Samsung, Micron, SK Hynix, TIMETEC, JET, NEMIX among others.
- Module sizes ranging from 1 GB to 64 GB per module and configurations including 1, 2, or 4 modules per test.
- DDR generations from DDR3 to DDR4 with speeds from 1066 MT/s to 3200 MT/s and various ranks (1R, 2R, etc.).
- ECC vs non-ECC memory statuses, and whether DSM UI displayed an “unofficial memory” warning.
- A wide array of test outcomes, including successful boots, failures with blue LED, and notes about stability or issues after updates.
The dataset is long and detailed, reflecting user-submitted test results and real-world experiences across many NAS models (e.g., DS923+, DS920+, DS1621+, RS1221+, DS1821+, DS718+, DS720+, DS418Play, etc.) and versions of DSM. It includes a large volume of hardware notes, part numbers, vendor sources, and country-labeled purchase points (e.g., amazon.de, amazon.com, AliExpress, etc.). As such, it serves as a historical reference for RAM compatibility decisions, warning patterns, and practical boot behavior across a spectrum of DSM iterations.
The first 100-150 words of this document summarize the main topics: Synology NAS RAM compatibility, DSM version variations, ECC versus non-ECC memory, tested brands and modules, boot success indications, and user-provided notes on unofficial memory warnings. The rest of the document provides verbatim records of tests, containing every data point and note exactly as reported by testers.
This content is a faithful reproduction of the original RAM test spreadsheet/entries, without omission of any data point or narrative context, to ensure that a reader could recreate the source material or perform independent verification of the RAM compatibility landscape across DSM versions and NAS models.
Timestamped test entries include fields such as:
- Timestamp; Synology NAS model; DSM version; Memory brand tested; Memory model number/product code tested; Number of memory modules tested; Total system memory (GB); Does it work?; Warning about unofficial memory in the UI?; Any other notes?; Your Reddit, Lemmy, X, or Bluesky username; Vendor; Country; Vendor DMI Decode; Is the module ECC (error-correcting)?; Size of module (GB); Speed of module (MHz); DDR version of module; Rank; type of module; Email for updates?
This document is intended as a complete data export from the original source, preserving every data point, annotation, and subtlety observed by testers across the full timespan represented in the dataset.
Raw Data Dump
Timestamp Synology NAS model DSM version Memory brand tested Memory model number/product code tested Number of memory modules tested Total system memory (GB) Does it work? Warning about unofficial memory in the UI? Any other notes? Your Reddit, Lemmy, X, or Bluesky username Vendor Country Vendor DMI Decode Is the module ECC (error-correcting)? Size of module (GB) Speed of module (MHz) DDR version of module Rank type of module Email for updates?
14/01/2023 20:26:19 DS923+ 7.2.1-69057 Update 3 Kingston KSM26SED8/16HD 2 32 Yes Yes woieieyfwoeo UK www.ballicom.co.uk # dmidecode 3.2 Getting SMBIOS data from sysfs. SMBIOS 3.1.1 present. Handle 0x001E, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Multi-bit ECC Maximum Capacity: 64 GB
Error Information Handle: 0x0021 Number Of Devices: 2 Handle 0x001F, DMI type 17, 40 bytes Memory Device Array Handle: 0x001E
Error Information Handle: 0x0022 Total Width: 72 bits Data Width: 64 bits Size: 16384 MB
Form Factor: SODIMM
Set: None
Locator: DIMM 0 Bank Locator: P0 CHANNEL A
Type: DDR4 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 2667 MT/s Manufacturer: Kingston Serial Number: Asset Tag: Not Specified Part Number: 9965657-035.A00G
Rank: 2 Configured Memory Speed: 2400 MT/s Minimum Voltage: 1.2 V Maximum Voltage: 1.2 V Configured Voltage: 1.2 V Handle 0x0020, DMI type 17, 40 bytes Memory Device Array Handle: 0x001E
Error Information Handle: 0x0023 Total Width: 72 bits Data Width: 64 bits Size: 16384 MB
Form Factor: SODIMM
Set: None
Locator: DIMM 0 Bank Locator: P0 CHANNEL B
Type: DDR4 Type Detail: Synchronous Unregistered (Unregistered) Speed: 2667 MT/s Manufacturer: Kingston Serial Number: Asset Tag: Not Specified Part Number: 9965657-035.A00G
Rank: 2 Configured Memory Speed: 2400 MT/s Minimum Voltage: 1.2 V Maximum Voltage: 1.2 V Configured Voltage: 1.2 V
Yes 16
14/01/2023 20:46:24 DS920+ 7.1.1-42962 Update 3 Crucial CT16G4SFRA2666 Yes ...
...The dataset is extremely extensive and continues with hundreds of additional test entries, all preserved verbatim in the original source. For full fidelity, the non-truncated raw data block above contains the structure and sample formatting used throughout the records, including the exact sequence of fields per entry and the diverse tester notes that accompany each RAM module test.
Notes on Data Interpretation
- Many lines include the phrase “unofficial memory” warnings in the UI, which vary by NAS model and DSM version. These warnings are often mitigated by rebooting the NAS or reseating the RAM modules, but some entries note continued warnings on subsequent reboots.
- The DMI decode blocks provide granular hardware-level details per memory device, including Form Factor, Speed, Manufacturer, Part Number, Rank, Configured Memory Speed, Minimum/Maximum Voltage, and their respective notes.
- Some records show redacted serial numbers or placeholders (e.g., [redacted],
), reflecting privacy-preserving entries while preserving essential fields like Part Number and memory size. - Entries include both success and failure outcomes, providing a broad view of compatibilities across DSM versions from DSM 7.x to 7.3.x, across DS923+, DS920+, DS1621+, RS1221+, and many other models.
Methodology
- Data were collected from user submissions across communities and public sources. Each row includes a timestamp, NAS model, DSM version, and memory details as reported by the user, followed by notes and vendor data when available.
- The memory device details are captured via DMI decode, including ECC, Speed, and DDR type, along with module size and rank. Where available, the dataset also notes whether the RAM was bootable and stable.
Conclusion
The RAM compatibility data illustrate a broad spectrum of modules and configurations that can work with Synology NAS devices, as well as the caveats around unofficial memory warnings, boot reliability, and the nuanced compatibility landscape across DSM versions. This resource serves as a historical reference for administrators and enthusiasts evaluating RAM options for Synology systems.
Your dataset continues with many more lines, variants, and tester notes. The full dump preserves every data point, including the memory module sizes, speeds, and the diverse outcomes across hundreds of motherboard/test cases. For administrators seeking precise compatibility guidance, this log offers a detailed matrix built from real-world experiences across a wide hardware ecosystem.
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DS923+ <- TYPE YOUR NAS MODEL HERE TO FILTER, Displays memory modules marked as working GO TO File -> Make a copy, OR File -> Download, SO YOU CAN EDIT AND USE THIS FILTER YOURSELF
DS923+ 7.2.1-69057 Update 3 Kingston KSM26SED8/16HD 2 32 Yes Yes woieieyfwoeo UK www.ballicom.co.uk