Quick Summary (TL;DR):
For this comparison, the closest ASUSTOR model is the Flashstor 6 Gen2 (FS6806X). It gives you six M.2 NVMe slots, an AMD Ryzen Embedded V3C14 with 4 cores/8 threads, 8GB DDR5 expandable to 64GB with ECC support, one 10GbE port and two USB4 ports. The UGREEN DXP480T Plus has four M.2 NVMe slots, but a much stronger Intel Core i5-1235U with 10 cores/12 threads, 8GB DDR5 expandable to 64GB, Intel Quick Sync, one 10GbE port, two Thunderbolt 4 ports, Wi-Fi 6 and an 8K HDMI output. Slot count alone is misleading: ASUSTOR publishes an asymmetric layout of 1 × PCIe 4.0 x4, 3 × PCIe 4.0 x2 and 2 × PCIe 4.0 x1, while UGREEN’s product documentation specifies 2 × PCIe 4.0 x4 plus 2 × PCIe 3.0 x2. Both arrays have vastly more local SSD bandwidth than one 10GbE link can expose. Choose the Flashstor 6 Gen2 when six drives, better RAID 5/6 capacity efficiency and ECC support matter most. Choose the DXP480T Plus when stronger CPU performance, Intel media acceleration, Thunderbolt 4 and a compact four-drive design matter more.
ASUSTOR Flashstor Gen2 vs UGREEN DXP480T Plus at a Glance
| Feature | ASUSTOR Flashstor 6 Gen2 | UGREEN DXP480T Plus |
|---|---|---|
| Model | FS6806X | DXP480T Plus |
| CPU | AMD Ryzen Embedded V3C14 | Intel Core i5-1235U |
| Cores / threads | 4 / 8 | 10 / 12 |
| Max frequency | 3.8GHz | 4.4GHz |
| RAM included | 8GB DDR5 | 8GB DDR5 |
| Maximum RAM | 64GB; ECC supported | 64GB; platform ECC not supported |
| M.2 NVMe slots | 6 | 4 |
| Fastest slot | PCIe 4.0 x4 | PCIe 4.0 x4 |
| Published slot topology | 1× x4, 3× x2, 2× x1 (Gen4) | 2× Gen4 x4 + 2× Gen3 x2 |
| Networking | 1 × 10GbE | 1 × 10GbE |
| High-speed external I/O | 2 × USB4 | 2 × Thunderbolt 4 |
| Display output | None | 8K HDMI |
| System storage | 8GB eMMC | 128GB SSD |
| RAID | Single/JBOD/0/1/5/6/10 | Basic/JBOD/0/1/5/6/10 |
| Best fit | Six-drive all-flash storage / ECC | Compute-heavy all-flash home server |
Why Compare the Flashstor 6 Gen2 Rather Than the 12 Pro Gen2?
ASUSTOR’s Flashstor Gen2 family includes the Flashstor 6 Gen2 FS6806X and the larger Flashstor 12 Pro Gen2 FS6812X. The six-slot model is the more direct competitor to UGREEN’s four-slot DXP480T Plus because both target compact high-speed all-flash storage. The 12 Pro Gen2 is a different capacity class with twelve M.2 slots and dual 10GbE.
CPU: Ryzen V3C14 vs Core i5-1235U
The Flashstor 6 Gen2 uses AMD’s Ryzen Embedded V3C14: 4 Zen 3 cores, 8 threads, 2.3GHz base, up to 3.8GHz boost, 8MB L3 cache, a 15W nominal TDP, dual-channel DDR5 with ECC support and 20 PCIe Gen4 lanes.
The DXP480T Plus uses Intel’s Core i5-1235U: 10 cores (2 performance + 8 efficiency), 12 threads, up to 4.4GHz, 12MB Smart Cache, 15W processor base power, 20 PCIe lanes, Intel Iris Xe eligible graphics with 80 execution units and Intel Quick Sync Video.
For Docker, databases, indexing and mixed application workloads, the UGREEN has the stronger general compute platform on paper. Do not turn those specifications into invented benchmark percentages: real performance still depends on memory, thermal limits, filesystem, RAID layout and software implementation.
ASUSTOR’s ECC Support Is a Real Storage Advantage
Both systems ship with 8GB DDR5 and both support up to 64GB. The important difference is ECC.
AMD officially lists the V3C14 with dual-channel DDR5 ECC support, and ASUSTOR explicitly supports ECC memory on the FS6806X. Intel officially lists the i5-1235U as not supporting ECC memory.
UGREEN’s specification mentions ODECC, which refers to DDR5 on-die error correction inside the memory device. That is not the same as platform-level ECC memory protecting transfers between DIMM and memory controller. If ECC is part of your storage-integrity requirement, the Flashstor has the cleaner story.
Six M.2 Slots vs Four Is the Biggest Practical Difference
The Flashstor 6 Gen2 gives you six M.2 2280 positions. The DXP480T Plus gives you four. Two extra drives affect much more than raw capacity: RAID 5 efficiency, RAID 6 efficiency, number of independent pools, ability to separate application and archive storage, and future capacity growth.
RAID 5 Capacity with Equal 8TB SSDs
| Array | Raw capacity | Approx. RAID 5 usable before overhead |
|---|---|---|
| 4 × 8TB | 32TB | 24TB |
| 6 × 8TB | 48TB | 40TB |
RAID 6 Makes Six Slots Much More Attractive
| Array | Raw capacity | Approx. RAID 6 usable before overhead |
|---|---|---|
| 4 × 8TB | 32TB | 16TB |
| 6 × 8TB | 48TB | 32TB |
On four drives, RAID 6 consumes half of the raw capacity for dual parity. On six drives, the same two parity drives consume only one-third. If you specifically want two-drive fault tolerance, the Flashstor 6 Gen2 has a major capacity-efficiency advantage.
More Slots Do Not Mean Equal Slot Bandwidth
ASUSTOR publishes the FS6806X’s six-slot topology as:
- 1 × PCIe Gen4 x4.
- 3 × PCIe Gen4 x2.
- 2 × PCIe Gen4 x1.
UGREEN’s DXP480T Plus product documentation specifies:
- 2 × PCIe Gen4 x4.
- 2 × PCIe Gen3 x2.
Neither device gives every SSD four PCIe Gen4 lanes. Choose NVMe drives for endurance, thermal behaviour, compatibility, capacity and real slot bandwidth rather than simply buying the model with the biggest advertised sequential number.
Our dedicated guide later in the series covers this directly: Best NVMe SSDs for NAS Cache and Containers.
10GbE Is the Network Bottleneck Long Before the SSDs
Both models include one 10GbE RJ45 port. 10GbE has a raw line rate of around 1.25GB/s, and real SMB/NFS throughput is lower after protocol overhead. Even one modern NVMe SSD can exceed that.
ASUSTOR publishes an optimised RAID 5 laboratory result of around 1,179MB/s read and 1,181MB/s write over 10GbE for the FS6806X. Treat that as a vendor benchmark under ideal conditions, not a guaranteed result. The useful conclusion is simply that both systems can reach the practical ceiling of one 10GbE link.
Why Internal NVMe Bandwidth Still Matters
The NAS also does work locally: RAID rebuilds, snapshots, VMs, databases, Docker volumes, checksums, scrubs and local pool-to-pool copies. Those workloads can use more internal storage bandwidth than one external 10GbE client sees.
UGREEN Has the Stronger CPU for Compute-Heavy NAS Work
The i5-1235U’s 10 cores/12 threads give UGREEN more headroom for large Docker stacks, photo indexing, several databases, VMs and media processing. ASUSTOR’s V3C14 is a capable Zen 3 embedded processor, but its strength is balanced storage/server I/O rather than maximum core count.
UGREEN Also Has Intel Quick Sync
The i5-1235U includes Intel Quick Sync Video and two multi-format codec engines. That gives the DXP480T Plus a stronger hardware foundation for supported Plex/Jellyfin transcoding than the CPU-only ASUSTOR V3C14 platform.
Actual media performance still depends on codec, HDR tone mapping, application version, container access to the iGPU, subtitle handling and software licensing where required. For Direct Play, the media advantage matters far less.
USB4 vs Thunderbolt 4
The Flashstor 6 Gen2 includes two USB4 Type-C ports. The DXP480T Plus includes two Thunderbolt 4 ports.
Both are high-speed external interfaces, but do not assume that “40Gbps Type-C” means the NAS becomes a direct-attached 40Gbps network device for a laptop. AMD specifically states that host-to-host USB4 connectivity is not supported by the Ryzen Embedded V3000 platform, so ASUSTOR’s USB4 ports are for compatible peripherals and storage rather than direct USB4 NAS networking.
For UGREEN, verify the exact UGOS Pro Thunderbolt workflow you intend to use rather than assuming every Thunderbolt mode available on a desktop PC is exposed by the NAS.
UGREEN Adds Wi-Fi 6 and HDMI
The DXP480T Plus also includes built-in Wi-Fi 6 and an HDMI output rated up to 8K. These are unusual NAS features and can be useful in certain creator or local-display workflows, but they are not reasons to buy the UGREEN if your NAS will live headless in a cabinet connected by Ethernet.
ADM vs UGOS Pro
ASUSTOR ADM provides Btrfs, snapshots, App Central, Docker Engine, VirtualBox, backup/sync applications, iSCSI and surveillance tools. UGOS Pro provides storage/RAID management, Docker, Compose-style projects, Virtual Machine Manager on DXP hardware, file services, backup/sync, photo/media applications and remote-access tooling.
ASUSTOR still has the more established NAS software history. UGREEN has the stronger CPU/media hardware in this exact comparison.
Docker and VMs: UGREEN Has More Compute Headroom
An all-flash NAS makes a particularly good application server because NVMe removes much of the random-I/O bottleneck that hurts VMs and databases.
all-flash pool
├── Docker
├── databases
├── Immich
├── Nextcloud
├── VMs
├── build environments
└── active project filesBoth systems can host these workloads, but the i5-1235U gives UGREEN more CPU headroom when several services run simultaneously. ASUSTOR’s advantage is that six SSDs let you build more pools or preserve more usable capacity with parity.
Six Drives Can Be Cheaper Than Four for the Same Protected Capacity
More slots do not automatically mean a more expensive storage build. A six-slot system can sometimes reach a target usable capacity using smaller SSDs, depending on current price per TB.
SSD cost
÷ usable protected TB
+ future replacement cost
+ backup costDo not compare enclosure price alone.
Thermals Matter More in All-Flash NAS Than Buyers Expect
NVMe SSDs are silent, but high-performance controllers can become hot during sustained workloads. Both products use active cooling because several M.2 devices are packed into a compact chassis.
- Check controller temperature.
- Check heatsink clearance.
- Check thermal-pad design.
- Check sustained-write throttling.
- Choose NAND/endurance appropriate to the workload.
A drive that wins a desktop benchmark with a giant heatsink may be a poor fit inside a tightly packed NAS.
Power Consumption: Both Are Efficient for the Performance
ASUSTOR lists the Flashstor 6 Gen2 at around 17.9W operating and 1.2W sleep. UGREEN lists the DXP480T Plus at 23.14W during its drive-access test and 16.94W in its published hibernation state.
These figures are not directly comparable because the vendors use different test conditions and power states. The broader conclusion is that both can deliver workstation-class storage performance at far lower power than a large desktop server plus multiple HDDs.
Physical Size
- Flashstor 6 Gen2: 48.3 × 308.26 × 193mm.
- DXP480T Plus: 179 × 142 × 52mm.
The UGREEN is substantially smaller. ASUSTOR uses a wide, low-profile chassis to accommodate six M.2 positions and its cooling layout, while UGREEN is closer to a compact mini-PC footprint.
Which Is Better for 4K Video Editing over 10GbE?
Both can provide enough local SSD throughput to saturate one 10GbE link. The choice therefore depends on required usable capacity, number of editors, ECC requirements, local processing/container workloads and external-I/O needs.
Our dedicated guide covers the complete network path: Best NAS for 4K Video Editing over 10GbE.
Which Is Better for a Home Lab?
The DXP480T Plus has the stronger compute profile: 10 cores/12 threads, Intel Quick Sync, 64GB RAM support, all-flash storage and 10GbE.
The Flashstor has the stronger storage-flexibility profile: six M.2 slots, ECC memory support, better RAID 5/6 capacity efficiency and ADM’s established storage/application ecosystem.
When the Flashstor 6 Gen2 Is the Better Buy
- You want six NVMe slots.
- You want RAID 6 without losing half of a four-drive array to parity.
- You need ECC memory support.
- You want more storage-pool flexibility.
- You value ADM’s established ecosystem.
- Your workload is storage-heavy rather than CPU-heavy.
When the DXP480T Plus Is the Better Buy
- You want the stronger CPU.
- You need Intel Quick Sync.
- Four NVMe drives provide enough usable capacity.
- You prefer the smaller chassis.
- You want Thunderbolt 4 peripheral connectivity.
- You want Wi-Fi 6 or HDMI output.
- You run many containers, databases or VMs.
When Neither Is the Right Choice
An all-flash NAS may be the wrong architecture when you need 50TB, 100TB or more at the lowest cost, when the workload is mostly backups or cold media storage, when your network is only Gigabit, or when you do not benefit from low latency or random I/O.
Read All-SSD NAS vs Hard-Drive NAS: Speed, Noise and Total Cost before assuming flash is automatically the better NAS.
A Practical Buying Matrix
| Your priority | Better fit | Reason |
|---|---|---|
| Maximum CPU headroom | DXP480T Plus | i5-1235U 10C/12T |
| ECC RAM support | Flashstor 6 Gen2 | V3C14 + ASUSTOR ECC support |
| Maximum NVMe slot count | Flashstor 6 Gen2 | 6 vs 4 |
| Best four-drive slot bandwidth | DXP480T Plus | 2× Gen4 x4 + 2× Gen3 x2 |
| RAID 6 capacity efficiency | Flashstor 6 Gen2 | Six drives instead of four |
| 10GbE file serving | Tie | Both have one 10GbE port |
| Plex/Jellyfin transcoding | DXP480T Plus | Intel Quick Sync |
| Compact footprint | DXP480T Plus | Much smaller chassis |
| Established NAS software | Flashstor 6 Gen2 | ADM ecosystem |
| Docker / VM compute | DXP480T Plus | More CPU cores/threads |
ASUSTOR Flashstor Gen2 vs UGREEN DXP480T Plus: The Bottom Line
The Flashstor 6 Gen2 is the better storage-first all-flash NAS. Six M.2 slots give you more capacity, better RAID 5/6 efficiency and more pool flexibility, while ECC support is valuable for a serious storage server.
The DXP480T Plus is the better compute-first all-flash NAS. The i5-1235U provides far more CPU threads, Intel Quick Sync, strong four-slot PCIe connectivity, 64GB RAM support and useful creator-oriented I/O in a much smaller chassis.
For ordinary 10GbE file copies, neither wins because one 10GbE link becomes the bottleneck before either SSD array runs out of bandwidth.
The decision therefore comes down to six-drive RAID/storage flexibility and ECC versus stronger compute, Intel media acceleration and compactness.
Continue the All-Flash NAS Series
- All-SSD NAS vs Hard-Drive NAS: Speed, Noise and Total Cost
- Best NAS for 4K Video Editing over 10GbE
- Best NVMe SSDs for NAS Cache and Containers
Datasheets & External Resources
- ASUSTOR Flashstor 6 Gen2 – Official specifications
- ASUSTOR Flashstor 6 Gen2 – Platform and 10GbE performance information
- AMD Ryzen Embedded V3C14 – Official specifications
- UGREEN DXP480T Plus – Official EU specifications
- UGREEN DXP480T Plus – Official product documentation
- Intel Core i5-1235U – Official specifications