TERRAMASTER | NAS | MEMORY | OEM COMPATIBLE SKU | CROSS-REFERENCE
Memory for TerraMaster NAS and backup servers — the current F, T and U series, all running DDR5-4800 non-ECC SODIMM.
F-series are the desktop NAS units: F2-424, F4-424 (including PRO and MAX), F6-424 and F6-424 MAX, and the all-SSD F8 SSD and F8 SSD Plus. T-series and U-series are the integrated backup servers — T9-500 Pro, T12-500 Pro, U4-500, U8-500 Plus and U12-500 Plus — rackmount and high-bay-count units built for backup targets rather than general file serving.
This whole generation standardised on one module type, which makes the buying decision unusually simple: DDR5-4800 SODIMM, 8GB or 16GB, non-ECC across the range.
Memory is the constraint on TerraMaster more than most. TOS runs Docker containers, virtual machines and multi-user file access on units that frequently ship with 8GB. On the F8 SSD and the higher-bay backup servers in particular, the flash and the network will outrun the base memory configuration under any real workload.
Check your model's maximum before ordering — TerraMaster publishes it per model and it varies within the same series. Send us the model and we'll confirm the capacity and slot count.
Lifetime warranty on every module. Purchase orders, net terms and volume pricing for business, government and education buyers.
Two hardware families, two upgrade paths
The DDR5 generation uses one module type but two very different boards, and which one you have decides how you upgrade. Intel N95 / N305 units (Alder Lake-N) have a single SODIMM slot on a single memory channel — the upgrade is a replacement, one module, and 16GB or 32GB is the ceiling depending on model. Core i5-1235U units have two slots on two channels — you can add a second module or replace with a matched pair, and 64GB is the ceiling. The module is DDR5-4800 non-ECC SODIMM either way; the slot count is what to check.
| Model | Processor | Ships with | Slots | Documented max | Upgrade path |
|---|---|---|---|---|---|
| F2-424 | Intel N95 | 8GB | 1 | 32GB | Replace the 8GB with one 16GB |
| F4-424 | Intel N95 | 8GB | 1 | 32GB | Replace the 8GB with one 16GB |
| F4-424 Pro | Core i3-N305 | 32GB | 1 | 32GB | Ships at maximum — no upgrade needed |
| F4-424 Max · F6-424 Max | Core i5-1235U | 8GB | 2 | 64GB | Add an 8GB or 16GB, or replace with a matched pair |
| F6-424 | Intel N95 / N305 (by build) | 8GB | 1 | 32GB | Replace the 8GB with one 16GB |
| F8 SSD | Intel N95 | 8GB | 1 | 32GB | Replace the 8GB with one 16GB |
| F8 SSD Plus | Core i3-N305 | 16GB | 1 | 32GB | At 16GB from the factory; 32GB is the only step up |
| T9-500 Pro · T12-500 Pro | Core i5-1235U | 8GB | 2 | 64GB | Add or pair |
| U4-500 | Intel N95 / N305 (by build) | 8GB | 1 | 32GB | Replace with one 16GB |
| U8-500 Plus · U12-500 Plus | Core i5-1235U | 8GB | 2 | 64GB | Add or pair |
Shipped capacity, slot count, and maximum are as TerraMaster publishes them and vary within a series — the F4-424, F4-424 Pro, and F4-424 Max are three different boards. Check your exact model's spec page, or send us the model and we confirm.
What to buy
- Single-slot N95 / N305 unit, currently 8GB: one 16GB module. It replaces the factory 8GB; the 8GB comes out. Single-channel, so there is no pairing to think about.
- Two-slot i5-1235U unit, currently 8GB, want 16GB: one 8GB module. It goes in the empty slot beside the factory 8GB and the pair runs dual-channel.
- Two-slot i5-1235U unit, want 32GB: two 16GB modules as a matched pair, replacing the factory 8GB. (Factory 8GB plus one 16GB works but runs partly single-channel.)
- Two-slot i5-1235U unit, want 64GB: two 32GB modules as a matched pair — ask us for the 32GB part if it is not listed on this page.
How to install it
- Shut the unit down from TOS and unplug it.
- Desktop F-series: the memory slot is behind the drive trays or under a cover on the underside; pull the trays, and the slot is on the exposed board. T-series towers and U-series rackmounts: remove the side or top panel.
- To replace: spread the two side latches, the module tilts up, pull it out. To add: seat the new module at about a 30-degree angle in the empty slot, notch aligned, and press down until both latches click.
- Reassemble, power on. TOS → Control Panel → Hardware Information shows the new total. No configuration required.
Rules that keep it simple
- Speed is fixed at 4800. The N95, N305, and i5-1235U all run DDR5 at 4800. A 5600 module fits and runs at 4800; there is no benefit to paying for it.
- Pairs on two-slot units. Two identical modules run dual-channel. The i5 units are the ones where this matters — they are the units doing transcoding and VM work.
- Stay at the documented maximum. 32GB on the single-slot units, 64GB on the two-slot units. Larger modules may post on some units but are outside what TerraMaster supports.
- Non-ECC only. None of these platforms support ECC; an ECC SODIMM is not a safer choice and may not post.
What more memory does on this generation
Your intro says it: TOS 6 runs Docker, VMs, and multi-user access on boxes that ship with 8GB. Specifically — a Plex or Jellyfin container with hardware transcoding on the i5 units, Immich or TerraMaster's own Photos indexing, Home Assistant, a download stack, and a reverse proxy are 4–6GB before any of them are busy; each VM on the T and U series wants 4–8GB of its own; and the backup roles those units are sold for — Duple Backup targets, Centralized Backup, iSCSI LUNs, snapshot management on TRAID — hold their index and cache in memory. On the F8 SSD, the all-flash array is fast enough that memory becomes the bottleneck first. 16GB is the sensible floor on any unit doing more than file serving; 32GB or 64GB on the i5 units is what makes them a small hypervisor rather than a NAS with a VM feature.
Why a tested module
Alder Lake-N and 12th Gen mobile memory controllers behind a NAS BIOS are less forgiving than a laptop, and a DDR5 SODIMM of the right nominal spec can still fail to train. Every NEMIX RAM module on this page is Specc'd on Micron, Samsung, or SK hynix DRAM to the specification TerraMaster qualified, then run in the unit family it is listed for before it is offered. Lifetime replacement warranty and free US-based support on every module.
Running TerraMaster in a business?
Volume and reseller pricing is available, and NEMIX RAM accepts purchase orders with net terms for business, government, and education buyers (registered federal supplier, UEI GV8MMYNDJ5J1, CAGE 59AB2). Send the models and unit count to our sales team and we return one quote with a matched set per unit.
Frequently asked
I have an F4-424 Pro. What should I buy? Nothing — it ships with 32GB, which is its maximum.
Can I add a second module to my F4-424? No. The N95 units have one slot. Replace the 8GB with a 16GB.
Will 32GB in a single-slot unit run dual-channel? No; the N95 / N305 have a single memory channel regardless of module size. It is still the right upgrade if you need the capacity.
I'm replacing TOS with TrueNAS or Unraid. Same module, same limits. ZFS uses spare RAM as read cache, so the i5 units at 32GB or 64GB are the common target.
Does upgrading void the TerraMaster warranty? TerraMaster documents memory as user-upgradeable. Adding memory does not void the NAS warranty; our lifetime warranty covers the module.
NEMIX RAM can deliver any Configuration your Fleet Requires
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