ASUSTOR | LOCKERSTOR | FLASHSTOR | NAS | MODEL | MEMORY UPGRADES
ASUSTOR is ASUS's NAS subsidiary, and its lines take different memory. LOCKERSTOR is the multi-bay family built around hot-swap drive bays, with the current Gen3 units on DDR5 SODIMM. FLASHSTOR is the all-flash family — M.2 NVMe rather than drive bays, far higher throughput, much smaller chassis — with the Gen2 units (FS6806X, FS6812X) also on DDR5. Older AS5, AS6 and AS7 series run DDR4 or DDR3. Across all of them the choice that matters is ECC versus non-ECC: ASUSTOR's own part numbers differ by two characters (AS-16GD5 is non-ECC, AS-16GECD5 is ECC), and a unit specified for ECC will not run without it. Match the full part code, not the capacity.
The ASUSTOR lines, and what each one takes
Lockerstor is the hot-swap multi-bay family and spans three memory generations. Gen3 (AS6804T, AS6806T, AS6810T, AS6812T) is built on the AMD Ryzen V3C14 and takes DDR5-4800 ECC SODIMM — two slots, 16GB from the factory, 64GB maximum. Gen2 (AS6702T, AS6704T, AS6706T) is Intel Celeron N5105 on DDR4-2933 non-ECC SODIMM — two slots, 4GB from the factory. Gen1 (AS6604T, AS6606T) is Celeron J4125 on DDR4-2400 non-ECC SODIMM. The 8- and 10-bay Lockerstor (AS6508T, AS6510T) is Atom C3538 on DDR4-2133 non-ECC SODIMM with a 32GB ceiling. Lockerstor Pro (AS7110T) and the rackmount Lockerstor R Pro (AS7112RDX, AS7116RDX) are the outliers: Xeon E-2224, four slots of full-size 288-pin DDR4 ECC UDIMM, 64GB maximum — not SODIMM at all.
Flashstor is the all-M.2 family. Gen2 (FS6806X, FS6812X) shares the Ryzen V3C14 board with Lockerstor Gen3 and takes the same DDR5-4800 ECC SODIMM, 64GB maximum. Gen1 Flashstor 6 and 12 Pro (FS6706T, FS6712X) share the N5105 board with Lockerstor Gen2 — DDR4-2933 non-ECC SODIMM, 4GB from the factory. On the Flashstor units the flash array is fast enough that memory becomes the bottleneck first, which is why they are the units most often upgraded.
Nimbustor is the two- and four-bay home line. Gen2 (AS5402T, AS5404T) is N5105 on DDR4-2933 non-ECC SODIMM; Gen1 (AS5202T, AS5304T) is Celeron J4005 / J4105 on DDR4-2400. Drivestor and Drivestor Pro (AS1102T, AS1104T, AS3302T, AS3304T) are ARM units with soldered memory and cannot be upgraded.
The older AS7 (AS7004T, AS7008T, AS7010T — Core i3-4005U), AS6 (AS6102T through AS6404T — Celeron J3160 / J3355 / J3455), and AS5 (AS5002T through AS5010T — Celeron J1900) series all run DDR3L-1600 SODIMM at 1.35V. A standard 1.5V DDR3 module will not post in them.
ECC or not, by unit
| ECC required | Non-ECC |
|---|---|
| Lockerstor Gen3 (Ryzen) · Flashstor Gen2 (Ryzen) · Lockerstor Pro and R Pro (Xeon, UDIMM) | Lockerstor Gen1 and Gen2 · Lockerstor 8 / 10 · Flashstor 6 / 12 Pro · Nimbustor Gen1 and Gen2 · AS5 / AS6 / AS7 |
ASUSTOR's part numbers carry it in two letters — AS-16GECD5 is ECC, AS-16GD5 is not — and the capacity and generation codes on either side are identical, which is how the wrong one gets ordered. The Ryzen and Xeon units are specified for ECC because they are sold as small hypervisors and backup targets; match the full code.
Finding your model and what is in it
The model number is on the underside label and in ADM → System Information, which also shows installed memory and, on two-slot units, slot population. ASUSTOR's compatibility page for the model lists the AS- part, the slot count, and the documented maximum. With those three things — model, installed capacity, target capacity — the module is determined, and the ASUSTOR cross-reference collection lists every AS- part with its NEMIX RAM equivalent, filterable by system model. Not sure? Send us the model and we confirm before you order.
Three rules that cover every ASUSTOR upgrade
- Pairs on two-slot units. Two identical modules run dual-channel. Replacing the factory 4GB or 8GB with a matched pair is the clean upgrade on any unit that will run Plex, containers, or a VM.
- Speed is set by the CPU. N5105 at 2933, J4125 at 2400, C3538 at 2133, Ryzen V3C14 and Xeon E-2224 at their rated speeds. A faster module of the right generation fits and runs at the CPU's speed; there is no benefit to paying for more.
- Documented maximums are conservative on the N5105 units. ASUSTOR documents 16GB on Lockerstor Gen2, Flashstor Pro, and Nimbustor Gen2; 2×16GB is widely reported to work but is outside the stated configuration. Choose knowing that.
Why NEMIX RAM for ASUSTOR
Every module we list for an ASUSTOR is specc'd on Micron, Samsung, or SK hynix DRAM to the specification of the ASUSTOR part it replaces — ECC where the part is ECC, 1.35V where the unit is DDR3L — and run in the unit family it is listed for before it is offered. ADM reports the installed capacity and runs it; there is no brand check and no warning. Adding memory does not void the ASUSTOR warranty — ASUSTOR documents it as user-upgradeable — and every module carries NEMIX RAM's lifetime replacement warranty with free US-based support. Volume and reseller pricing, purchase orders, and net terms are available for business, government, and education buyers (registered federal supplier, UEI GV8MMYNDJ5J1, CAGE 59AB2).
NEMIX RAM can deliver any Configuration your Fleet Requires
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