Best RAM for the TerraMaster F4-425
By Devin Chua · Data checked by Owen Nakamura · Updated The TerraMaster F4-425 ships with 4 GB of DDR4 SO-DIMM, no ECC (1 slot) and officially takes 16 GB. What benefits from the upgrade is specific to this box: the Intel N5095 (4 cores, 2.0 GHz) hardware-transcodes and runs containers, and those — not plain file storage — are what more memory feeds. Below are matching modules from Amazon.ca in CAD.
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Compatible memory for the F4-425, live from Amazon.ca
What sets the F4-425 apart
The only alternative to Synology with a genuine SHR counterpart: TRAID uses mixed drive sizes, TRAID+ matches SHR-2 with double fault tolerance. If you have a stack of mismatched drives, you lose less here than with UGREEN or QNAP.
What more memory buys on the F4-425
The F4-425 takes DDR4 SO-DIMM, no ECC (1 slot) up to an official 16 GB, across 1 slot, starting from 4 GB. Whether that upgrade earns its money is a question about this exact box: the Intel N5095 (4 cores, 2.0 GHz) transcodes Plex and runs containers, and it is the containers, not the file shares, that ask for more RAM.
The F4-425 uses non-ECC DDR4 SO-DIMM, no ECC (1 slot), so a flipped bit is not corrected. That is rarely a problem in practice, but it is why DIY TrueNAS builders insist on ECC; on the F4-425 you simply match the SO-DIMM spec and standard sticks are fine. 16 GB official
The TerraMaster drive policy on the F4-425
unrestrictedOpen, and TerraMaster advertises it: “TerraMaster restricts neither drive brands nor third-party SSDs.” The compatibility list is purely advisory.
The F4-425 at a glance
| Bays | 4 × 3.5-inch SATA and 2.5-inch SATA SSD |
|---|---|
| Maximum raw capacity | 120 TB 4 × 30 TB, per the manufacturer |
| Processor | Intel N5095 (4 cores, 2.0 GHz) |
| Memory | 4 GB, DDR4 SO-DIMM, no ECC (1 slot) 16 GB official |
| M.2 NVMe | none No M.2 slots. Note: NVMe, DDR5 and 5GbE only come with the F4-425 Plus, not this model. |
| Network | 1 × 2.5GbE |
| Operating system | TOS 6 |
| RAID types | TRAID, TRAID+, Single, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10 TRAID also makes use of mixed drive sizes. |
Keep calculating
To see how much capacity is left after parity, the F4-425 capacity calculator is preset to its 4 bays and RAID types. For the F4-425, 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 F4-425 use?
DDR4 SO-DIMM, no ECC (1 slot), starting from 4 GB. 16 GB official It uses standard non-ECC modules.
Can the F4-425's memory be upgraded?
Yes. The F4-425 has one slot, officially to 16 GB.
Is more RAM worth it in the F4-425?
Only if you run containers. The F4-425's Intel N5095 (4 cores, 2.0 GHz) transcodes and runs Docker well, and it is the containers — not file shares — that ask for more than the stock 4 GB.
Can I put third-party drives in the F4-425?
Yes. TerraMaster locks no drive brand on the F4-425 — its compatibility list is guidance, not a gate — so any CMR NAS drive works.
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)