Best RAM for the Synology DiskStation DS923+
By Devin Chua · Data checked by Owen Nakamura · Updated The Synology DiskStation DS923+ ships with 4 GB of DDR4 ECC SO-DIMM (2 slots) and officially takes 32 GB of ECC memory. What benefits from the upgrade is specific to this box: the AMD Ryzen R1600 (2 cores, 4 threads) runs Synology's apps, containers and a light VM or two, and ECC is the reason to buy branded modules here. Below are matching ECC modules from Amazon.ca in CAD.
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Compatible memory for the DS923+, live from Amazon.ca
What sets the DS923+ apart
The predecessor many bought for the drive policy, and still the only four-bay DiskStation with a genuine 10-gigabit upgrade slot. The Ryzen R1600 has only two cores: strong as a file store with ECC RAM, weak for many containers.
What more memory buys on the DS923+
The DS923+ takes DDR4 ECC SO-DIMM (2 slots) up to an official 32 GB, across 2 slots, starting from 4 GB. Whether that upgrade earns its money is a question about this exact box: the AMD Ryzen R1600 (2 cores, 4 threads) runs Synology's app suite, containers and a light VM, and those are what fill memory — plain file serving will not.
The DS923+ requires ECC memory, and that is not a marketing line: ECC corrects single flipped bits, which in a box that runs around the clock and holds your only copy of some files is the right call. Match the DDR4 ECC SO-DIMM (2 slots) spec exactly — non-ECC SO-DIMMs either are not recognized or run unreliably here. 32 GB official (2 × 16 GB ECC). In practice 64 GB (2 × 32 GB ECC SO-DIMM) also runs; Synology does not endorse it.
The Synology drive policy on the DS923+
unrestrictedOpen. The 2025 drive restriction explicitly does not apply retroactively: Synology confirms it applies “only to new models from 2025.” In the DS923+ every NAS drive runs without restriction.
The DS923+ at a glance
| Bays | 4 × 3.5-inch SATA and 2.5-inch SATA SSD |
|---|---|
| Maximum raw capacity | 96 TB 4 × 24 TB: the largest drive on Synology's compatibility list for this model. With a DX517 expansion the figure rises accordingly. |
| Processor | AMD Ryzen R1600 (2 cores, 4 threads) |
| Memory | 4 GB, DDR4 ECC SO-DIMM (2 slots) 32 GB official (2 × 16 GB ECC). In practice 64 GB (2 × 32 GB ECC SO-DIMM) also runs; Synology does not endorse it. |
| M.2 NVMe | 2 slots 2 × M.2 NVMe. NVMe cache is unrestricted; an NVMe storage pool requires a Synology-approved drive (that has always been the case here). |
| Network | 2 × 1GbE, expandable to 10GbE with the E10G22-T1-Mini add-in card |
| Operating system | DSM 7.x |
| RAID types | SHR, SHR-2, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10 SHR also makes use of mixed drive sizes. |
Keep calculating
To see how much capacity is left after parity, the DS923+ capacity calculator is preset to its 4 bays and RAID types. For the DS923+, the wider basics of choosing a drive are in the buying guides, where we also explain why CMR rather than SMR is mandatory in any RAID array.
Frequently asked questions
What memory does the DS923+ use?
DDR4 ECC SO-DIMM (2 slots), starting from 4 GB. 32 GB official (2 × 16 GB ECC). In practice 64 GB (2 × 32 GB ECC SO-DIMM) also runs; Synology does not endorse it. It requires ECC modules.
Can the DS923+'s memory be upgraded?
Yes. The DS923+ has 2 slots, officially to 32 GB of ECC.
Is more RAM worth it in the DS923+?
Yes if you virtualize. The DS923+'s AMD Ryzen R1600 (2 cores, 4 threads) can run containers and a light VM, and those are what use the extra memory; for plain file storage the stock 4 GB is enough.
Can I put third-party drives in the DS923+?
Yes, without restriction. The 2025 Synology drive lock covers only the 2025 models, so the DS923+ takes any NAS drive and has always done so.
Devin Chua works out which drives, RAM and NVMe cache fit which NAS model at nasdrives.ca, and what the RAID choice means for usable capacity, checked against what is in stock on Amazon.ca.
Data checked by Owen Nakamura, Technical editor (data checking)