The Asustor Lockerstor 4 Gen3 (AS6804T) is the no-compromise power-user pick, with an AMD Ryzen V3C14, ECC DDR5, dual 10GbE plus dual 5GbE, USB4, and four M.2 slots. TechRadar measured 3.1–3.5 GB/s using both 10GbE ports and USB4 together. The catch is the $1,299 diskless price, which TechRadar called a tough pill when capable 4-bays cost around $800 less.
Full review
Real-World Performance
The Asustor Lockerstor 4 Gen3 (AS6804T) is the performance ceiling of this roundup. It runs an AMD Ryzen V3C14 with ECC DDR5 memory — the most powerful processor in the group — and TechRadar measured a combined 3.1 to 3.5 GB/s when using both 10GbE ports alongside the USB4 Thunderbolt link on an NVMe RAID 0 setup. XDA called it incredibly powerful, citing the fast Ryzen CPU and two 10GbE links.
NAS Master went further, naming it one of the most powerful 4-bay NAS units it has tested to date. For anyone whose workflow is bottlenecked by storage throughput — video editors, large-dataset users — the AS6804T removes the network and compute limits that constrain cheaper 4-bays.
Networking and Connectivity
Connectivity is where the Lockerstor 4 Gen3 separates itself. It offers four LAN ports — two 10GbE and two 5GbE — for up to 30GbE of aggregate bandwidth, plus two USB4 Type-C ports at up to 40Gbps that accept USB4, Thunderbolt 3 or Thunderbolt 4 storage. No other NAS here comes close on raw I/O.
It also includes four M.2 slots, double the two found on the Synology DS923+, UGREEN DXP4800 Plus, QNAP TS-464 and TerraMaster F4-424 Pro. That enables a genuine all-flash NVMe pool alongside the four SATA bays, which is part of how it reaches multi-gigabyte-per-second transfers in testing.
Build Quality and Software
The AS6804T pairs an elegant black chassis with a front LCD that shows system status and IP address. Reviewers praised the build as premium. Asustor's ADM software also drew praise — XDA highlighted its streamlined UX and attractive design, especially in dark mode, and TechRadar noted setup takes only minutes from start to finish.
ADM is not as deep an ecosystem as Synology DSM, but it is polished, modern and easy to navigate. For a unit aimed at power users who often run their own services and containers, the software strikes a sensible balance between capability and approachability.
Throughput in Practice
The AS6804T's headline numbers are not theoretical. TechRadar measured a combined 3.1 to 3.5 GB/s when driving both 10GbE ports alongside the USB4 Thunderbolt link on an NVMe RAID 0 array — throughput that simply is not possible on any other NAS in this roundup, where the next-best is the UGREEN DXP4800 Plus at a single 10GbE port. For a video editor scrubbing multi-stream 4K timelines or moving terabyte project folders, that ceiling removes the storage bottleneck entirely.
Reaching those speeds requires populating the four M.2 NVMe slots and having client hardware and a network that can keep up — which is precisely why the unit is overkill for a buyer who will only ever use Gigabit or a single 2.5GbE link. The AS6804T is engineered for the narrow band of users whose workflows are genuinely I/O-bound, and for them it delivers performance the rest of this list cannot approach.
Where It Falls Short
Price is the dominant caveat. At $1,299 diskless, TechRadar called it a tough pill to swallow, especially when you can buy a capable 4-bay NAS for around $800 less before drives. The total climbs further once you add four HDDs plus SSDs, and any expansion unit and its drives compound the cost.
For the typical home buyer doing file storage, backups and Plex, the AS6804T is simply overkill — the Synology DS923+ or UGREEN DXP4800 Plus cover those needs for a fraction of the outlay. The Lockerstor 4 Gen3 only earns its price when you will actually saturate its 10GbE links and NVMe pool.
How It Compares to Alternatives
Against every other NAS here, the Lockerstor 4 Gen3 wins on raw capability: more CPU, more networking (dual 10GbE plus dual 5GbE), and more M.2 slots than the Synology DS923+, UGREEN NASync DXP4800 Plus, QNAP TS-464 or TerraMaster F4-424 Pro. The UGREEN offers a single 10GbE port for far less, which is the closer value comparison.
But it also costs more than double those rivals. The Synology DS923+ remains the better pick for software-first buyers, the UGREEN for value, and the QNAP TS-464 for Plex on a budget. The Asustor's argument is purely that nothing else here matches its throughput — and for the right user, that is worth the premium.
Value at This Price
Value is the AS6804T's hardest question. TechRadar was blunt: an amazing feature set that is only overshadowed by the price, calling $1,299 diskless a tough pill when you can buy a capable 4-bay for around $800 less. On a dollars-per-feature basis against the UGREEN DXP4800 Plus — which offers 10GbE for far less — the Asustor looks expensive.
The value only materializes if you genuinely saturate what it offers: dual 10GbE plus dual 5GbE, USB4 at 40Gbps, and a four-slot NVMe pool that together hit 3.1–3.5 GB/s in testing. For a video editor or heavy home-lab user whose workflow is throughput-bound, that capability is worth the premium and cheaper NAS units would bottleneck them. For everyone else, the money is better spent on a DS923+ or DXP4800 Plus and a stack of drives.
Who It's Best For
The Asustor Lockerstor 4 Gen3 is for power users and creative professionals who need maximum throughput, multi-10GbE networking and an all-flash NVMe pool in a 4-bay form factor. If you edit large video projects, move multi-gigabyte datasets, or run a demanding home lab and already have the network to feed it, this NAS will not be the bottleneck, and the polished ADM software keeps it pleasant to administer.
It is the wrong choice for mainstream home users — the price is more than double what a capable 4-bay costs, and most households will never approach its ceiling. Buy the AS6804T only when you can genuinely use its 30GbE of potential bandwidth and four NVMe slots; otherwise the savings on a DS923+ or DXP4800 Plus are better spent on drives.
Strengths
- +AMD Ryzen V3C14 with ECC DDR5 is the most powerful CPU here
- +Dual 10GbE plus dual 5GbE ports for up to 30GbE of bandwidth
- +Two USB4 Type-C ports at up to 40Gbps for Thunderbolt storage
- +Four M.2 NVMe slots for cache or an all-flash pool
- +Polished ADM software with a clean, modern interface
Watch-outs
- −At $1,299 diskless, it is more than twice the price of midrange rivals
- −Total cost climbs fast once you add drives and SSDs
- −Overkill for typical home file-storage and backup needs
- −Expansion units add further significant cost
How it compares
The Lockerstor 4 Gen3 is the performance king, with a stronger CPU and far more networking (dual 10GbE + dual 5GbE) than the UGREEN NASync DXP4800 Plus, Synology DS923+, QNAP TS-464 or TerraMaster F4-424 Pro. Its price is also more than double theirs, so it only makes sense when you genuinely need the throughput.
Who this is for
At a glance: Power users and creative pros who need maximum throughput, multi-10GbE networking and an all-flash pool in a 4-bay.
Why you’d buy the Asustor Lockerstor 4 Gen3 (AS6804T)
- AMD Ryzen V3C14 with ECC DDR5 is the most powerful CPU here.
- Dual 10GbE plus dual 5GbE ports for up to 30GbE of bandwidth.
- Two USB4 Type-C ports at up to 40Gbps for Thunderbolt storage.
Why you’d skip it
- At $1,299 diskless, it is more than twice the price of midrange rivals.
- Total cost climbs fast once you add drives and SSDs.
- Overkill for typical home file-storage and backup needs.
Rating sources
“An amazing feature set that's only overshadowed by the price.”
“This 4-bay NAS is incredibly powerful, with a fast AMD Ryzen CPU and two 10GbE links.”
“One of the most powerful 4-bay NAS I've tested to date.”
Our 4.3 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
