QNAP NAS Memory: TS, TVS, TS-h & ES Series by Model and QNAP Part Number
QNAP builds its NAS range on everything from ARM chips to Xeon and EPYC servers, so its memory spans every type: DDR3L, DDR4 and DDR5; SODIMM, UDIMM and RDIMM; ECC and non-ECC; one slot to sixteen. Three things decide the module for any QNAP unit: the form factor the board takes, whether the unit is specified for ECC, and the memory generation. QNAP's own part numbers spell all three out, and the QNAP memory by model collection lists the matching module for every upgradeable unit we cover — 128 models.
Reading a QNAP memory part number
Take RAM-16GDR5ECK0-UD-5600: 16G is the capacity, DR5 the generation (DR3, DR4 or DR5), EC marks an ECC SODIMM or UDIMM (no EC on those means non-ECC; RDIMM codes such as RAM-32GDR4K0-RD-3200 often omit it, but every RDIMM is ECC), the letter-and-digit code after it is QNAP's revision, UD is the form factor (SO = SODIMM, UD = UDIMM, RD = RDIMM), and 5600 is the speed. RAM-16GDR5K0-UD-5600 is the same module without ECC — the two codes differ by two letters, which is how the wrong one gets ordered. If you are replacing a module by its QNAP code, the QNAP part number collection lists the NEMIX RAM equivalent of each one.
The QNAP platforms, and what each one takes
Ryzen 7000 QuTS hero units — DDR5 UDIMM. The TVS-h877AX, TVS-h1277AX and TVS-h1677AX (Ryzen 5 7000), the rackmount TS-h1277AXU-RP, TS-h1677AXU-RP and TS-h2477AXU-RP (Ryzen 7 / Ryzen 7 Pro 7000), and the all-flash TS-h1077AFU and TS-h3077AFU take full-size DDR5 UDIMM in four slots, up to 192GB with 4x48GB. QNAP lists both ECC and non-ECC modules for the AX and AXU-RP models ("optional ECC"), and the AFU units ship with ECC. The TS-h1277AFX all-flash unit and the TVS-AIh1688ATX (Core Ultra 9) take DDR5 ECC UDIMM, also four slots and 192GB.
DDR5 SODIMM units. The TS-h966TX (Core i3) has two DDR5 SODIMM slots, up to 64GB. The short-depth rackmount TS-h665U and TS-h665U-RP, TS-h1065eU and TS-h1065eU-RP, TS-h1465U-RP and TS-h765eU have a single DDR5 SODIMM slot, up to 16GB, so the upgrade is one larger module.
Xeon rackmount and tower units — DDR4 ECC UDIMM. The QuTS hero TS-h686, TS-h886, TVS-h1288X and TVS-h1688X, the x83XU-RP rackmounts (TS-883XU-RP, TS-983XU-RP, TS-1283XU-RP, TS-1683XU-RP, TS-2483XU-RP, TS-h1283XU-RP, TS-h1683XU-RP, TS-h2483XU-RP), the TS-h1886XU-RP R2 and TS-h3088XU-RP, the x87XU-RP rackmounts (TS-h987XU-RP, TS-h1887XU-RP, TS-h2287XU-RP, TS-h3087XU-RP) and the QSN-3000 and QSN-3050 (Xeon E-2300, 4x32GB) take four slots of full-size DDR4 ECC UDIMM — listed at DDR4-3200 for the x87XU-RP and QSN units and DDR4-2666 for the rest. The x77XU-RP rackmounts (TS-877XU-RP, TS-h1277XU-RP, TS-h1677XU-RP, TS-h2477XU-RP) also take four full-size DDR4 UDIMMs, non-ECC. The QuCPE-3032 and QuCPE-3034 take two DDR4 non-ECC UDIMMs.
Enterprise and EPYC units — DDR4 ECC RDIMM. The dual-controller ES1686dc, ES2486dc, ES1686Adc, ES1686dc R2 and ES2486AFdc carry eight RDIMM slots per controller (Xeon D-2142IT on the newer models, up to 512GB per controller), so memory is ordered as a matched set for each controller. The TDS-h2489FU and TDS-h2489FU R2, the all-flash TS-h1090FU, TS-h1290FX and TS-h2490FU, and the QAI-h1290FX (EPYC) take eight RDIMM slots, up to 8x128GB (1TB) on the FU, FX and QAI units. The QuCPE-7010 and QuCPE-7012 network appliances take DDR4-2666 ECC RDIMM.
Ryzen embedded units — DDR4 SODIMM or UDIMM. The Ryzen V1500B TS-473A, TS-673A, TS-873A, TS-873AeU, TS-873AeU-RP and TS-h973AX take two DDR4 SODIMMs; the TS-1273AU-RP and TS-1673AU-RP take DDR4 UDIMM. The newer TS-467X, TS-667X and TS-867X (Ryzen V1500B) and TS-h1073BXeU and TS-h1073BXeU-RP (Ryzen V1780B) take two DDR4-3200 SODIMMs, up to 64GB. The Ryzen V1500B units ship with non-ECC modules but also accept ECC.
Intel Celeron and Core units — DDR4 SODIMM. The Celeron N5095 / J6412 family (TS-264, TS-364, TS-462, TS-464, TS-464U, TS-464U-RP, TS-464eU, TS-664, TS-864eU, TS-864eU-RP, TS-1264U-RP, TS-253E, TS-453E, TS-262A, TS-462A and the QVP-41C) takes two DDR4 non-ECC SODIMMs, documented to 16GB. QNAP's own module for them is DDR4-3200; the CPU runs it at 2933. The Core-based TVS-h474, TVS-h674, TVS-h874, TVS-h674T and TVS-h874T (Core i5-12400 / i7) and the QVP-63B (Core i3) take two DDR4-3200 SODIMMs, up to 64GB. The TS-453DU, TS-451DeU and HS-453DX take two DDR4-2666 SODIMMs. The older TVS-472XT, TVS-672XT, TVS-872XT and TVS-675 take DDR4-2666 SODIMM, and the TVS-473e, TVS-673, TVS-673e, TVS-873 and TVS-873e take four DDR4-2400 SODIMMs.
Atom C5125 units. The TS-855X and TS-1655 take four DDR4 UDIMMs; the TS-855eU, TS-855eU-RP and TS-h1655XeU-RP take two DDR4 SODIMMs. All accept ECC as well as non-ECC.
ARM units with a memory slot. The ARM-based units — the TS-x32X and TS-x32PX desktops (TS-332X, TS-432X, TS-632X, TS-832PX, TS-932PX), the TS-435XeU and TS-432XeU, and the rackmount TS-432PXU, TS-432PXU-RP, TS-832PXU, TS-832PXU-RP and TS-1232PXU-RP — have one slot, so the upgrade is a single larger module (up to 32GB on the TS-435XeU). The DDR3L TS-231P2, TS-231P3, TS-431P3, TS-431X3, TS-431KX and TS-431XeU also have one slot and take 1.35V DDR3L SODIMM. The Intel-based TS-251B and TS-1263XU take two DDR3L SODIMMs.
Not upgradeable. The HS-264, TBS-464, TBS-h574TX, TS-133, TS-233, TS-216G, TS-433, TS-433eU, TS-410E, TS-i410X, TS-AI642 and TVR-AI200 have soldered memory.
ECC or not, by platform
| ECC | ECC or non-ECC | Non-ECC |
|---|---|---|
| ES and TDS-h (RDIMM) · TS-h FU / FX and QAI-h1290FX (RDIMM) · QuCPE-70xx (RDIMM) · x83 / x86 / x87XU-RP, TS-h686 / h886, TVS-h1288X / h1688X, QSN (UDIMM) · TS-h1277AFX, TVS-AIh1688ATX (DDR5 UDIMM) | Ryzen 7000 AX, AXU-RP and AFU (DDR5 UDIMM) · Ryzen V1500B units (TS-x73A, TS-x67X, TS-x73AU-RP) · Atom C5125 units (TS-855X, TS-1655, TS-855eU, TS-h1655XeU-RP) | Celeron family · Core-based TVS-h474 / 674 / 874 and QVP · older TVS-x72XT / x73 · x77XU-RP · QuCPE-303x · DDR5 SODIMM units · ARM units · DDR3L units |
On the units that accept either, use one type throughout — do not mix ECC and non-ECC modules in one system. On the Xeon, EPYC and RDIMM platforms, order ECC.
Finding your model and what is in it
The model is on the label on the unit and in QTS or QuTS hero under Control Panel → System → System Status, which also shows installed memory. Watch the suffixes: the TS-h1277AXU-RP and TS-h1277XU-RP, or the TDS-h2489FU and TDS-h2489FU R2, are different platforms. QNAP's hardware spec page for each model lists its slot count, maximum and the QNAP part numbers that fit. With the model, the installed capacity and the target capacity, the module is determined — find it in the QNAP memory by model collection, where each listing offers only the kit sizes that fit that unit's slots. Not sure? Send us the model and we confirm before you order.
Four rules that cover every QNAP upgrade
- Pairs and full sets. Two-slot units run dual-channel with two identical modules; four- and eight-slot units should be filled in matched pairs or full sets. Avoid mixing sizes or makers in one unit.
- Speed is set by the platform. A faster module of the right generation and type runs at the speed the CPU supports — DDR4-3200 in a Celeron N5095 unit runs at 2933. There is no benefit to paying for more, and no harm in a faster module where it is the one in stock.
- Form factor is not interchangeable. SODIMM, UDIMM and RDIMM are physically and electrically different; an RDIMM will not run in a UDIMM unit even though both are full-size ECC sticks.
- Dual-controller ES units need memory in each controller. Order identical sets so both controllers carry the same capacity.
QNAP memory guides by segment
For a closer look at one part of the range: home and SOHO NAS, SMB NAS, enterprise NAS, dual-controller NAS and all-flash NAS.
QNAP memory guide and install guide
Two guides go with this page. The QNAP NAS Memory Guide: TS, TVS and TS-h by Model explains how to choose modules by model, and How to Install Memory in a QNAP NAS: TS, TVS and TDS Series covers the install steps, troubleshooting and sizing.
Why NEMIX RAM for QNAP
Every module we list for a QNAP matches the specification of the QNAP part it replaces — the same generation, form factor, ECC type and speed class, and 1.35V where the unit is DDR3L. Researched, matched, and compatibility-tested by NEMIX RAM, a US-based server memory specialist since 1993, and backed by a lifetime warranty. QTS and QuTS hero report the installed capacity and run it, and NEMIX RAM provides free US-based support. Volume and reseller pricing, purchase orders, and net terms are available for business, government, and education buyers, including matched sets for multi-unit NAS, surveillance and edge deployments (registered federal supplier, UEI GV8MMYNDJ5J1, CAGE 59AB2); request a quote. Memory for Synology, ASUSTOR, TerraMaster and UGREEN units is on the NAS memory page.
QNAP, QTS, QuTS hero and QuCPE are trademarks of QNAP Systems, Inc. NEMIX RAM is not affiliated with or endorsed by QNAP; model names identify compatibility only.
Related guide: TrueNAS RAM guide: how much memory you need and when ECC matters
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