Best RAM for the QNAP TS-233
By Devin Chua · Data checked by Owen Nakamura · Updated The QNAP TS-233's 2 GB (2 GB, soldered) is fixed to the board and cannot be upgraded, so you choose this once at purchase. The ARM Cortex-A55 (4 cores, 2.0 GHz) is an ARM file-server chip that would not use much more anyway: for file storage and backups the 2 GB is enough, and if you need headroom for containers or VMs, a model with memory slots is the answer.
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Want to know whether the TS-233 fits your actual storage plan? Open the NAS Builder with this model weighted.
Is 2 GB enough on the TS-233?
For what this model is built to do — file serving, device backups and everyday storage — yes. RAM on a NAS is mostly a disk cache, not a speed dial: the QTS 5.2 system and its file services run comfortably in 2 GB, and the ARM Cortex-A55 (4 cores, 2.0 GHz) would not do meaningfully more with extra memory even if it had a slot. Where more RAM genuinely earns its keep is heavy multitasking — running many Docker containers, virtual machines, or ZFS, which uses memory as a read cache — and the TS-233 is not built for any of those.
Because the memory is soldered, this is a buy-once decision with no upgrade path. If you already know you want a container or virtual-machine platform, choose a model with SO-DIMM slots instead — the drives-by-model index shows which do, and how much RAM a NAS needs sets out the real requirement by workload. For its intended job the TS-233’s fixed 2 GB is not the wall you hit first — capacity is, so put the planning into the drives with the drive calculator and the live CA$/TB table for the TS-233.
What sets the TS-233 apart
The cheapest QNAP and deliberately modest: an ARM processor, 2 GB of soldered RAM, one gigabit port. The network caps you at about 110 MB/s here, so a faster drive buys no more speed. Buy on noise and price per TB, not on data rate.
The QNAP drive policy on the TS-233
unrestrictedOpen. QNAP locks no drives.
The TS-233 at a glance
| Bays | 2 × 3.5-inch SATA and 2.5-inch SATA SSD |
|---|---|
| Processor | ARM Cortex-A55 (4 cores, 2.0 GHz) |
| Memory | 2 GB, 2 GB, soldered Soldered, not upgradeable |
| M.2 NVMe | none No M.2 slots |
| Network | 1 × 1GbE |
| Operating system | QTS 5.2 |
| RAID types | Single, JBOD, RAID 0, RAID 1 |
Keep calculating
To see how much capacity is left after parity, the TS-233 capacity calculator is preset to its 2 bays and RAID types. For the TS-233, 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. Wondering what the TS-233 can actually do — Plex, Immich, Docker, VMs? See what the TS-233 can run.
Frequently asked questions
What memory does the TS-233 use?
2 GB, soldered, starting from 2 GB. Soldered, not upgradeable It uses standard non-ECC modules.
Can the TS-233's memory be upgraded?
No. The 2 GB is soldered to the TS-233's board and cannot be changed — a decision you make once, at purchase.
Is more RAM worth it in the TS-233?
Rarely. The TS-233's ARM Cortex-A55 (4 cores, 2.0 GHz) does light file-server work; the stock 2 GB covers file storage and backups, and the chip would not make much of more.
Can the TS-233 run Plex with hardware transcoding?
Only in software. The TS-233's ARM Cortex-A55 (4 cores, 2.0 GHz) has no Quick Sync, so Plex transcodes on the CPU — enough for direct play, not for heavy 4K transcoding.
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)