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Best Mini PC for NAS (2026): Eight Picks Ranked by Bays, Not Benchmark Scores
A mini PC for a NAS is not a fast desktop with more disks bolted onto it. It is a storage appliance first: what matters is how many drives it can hold natively, how those drives talk to the operating system, how much power the box burns while sitting idle at 3 a.m., and whether it can be driven by TrueNAS, Unraid or Proxmox without fighting its network controller. A Ryzen 9 desktop mini with one M.2 slot and a USB enclosure hanging off the back will lose to a 6 W N150 box with four SATA bays almost every time you actually try to use it.
The market has changed enough that generic mini PCs should now generally lose this comparison outright. Purpose-built mini NAS hardware — native 3.5-inch trays in a chassis the size of a hardback book, dual 2.5GbE as a baseline, 10GbE and SFP+ on the upper tiers — is available at prices that used to buy only a barebones desktop mini. Meanwhile, Intel's Quick Sync media engine has quietly made low-power N-series systems some of the best Plex and Jellyfin appliances you can buy, even though their CPU benchmark scores look trivial next to an eight-core Ryzen.
This guide separates the category into the three architectures that actually exist, then ranks eight systems inside them. Everything here is judged on drive topology, network controllers, measured wall power with the drive state stated, memory expandability, media-engine capability and how mature the OS and driver path is — not on PassMark.
The picks below suit a range of buyers: the reader building a first four-bay TrueNAS box, the reader who wants six NVMe drives and no spinning rust, and the reader who needs a Proxmox host with a real SAS HBA on the end of a PCIe slot.
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Quick Picks
| Product | Best for | Architecture | Networking |
|---|---|---|---|
| AOOSTAR WTR Pro N150 | Best budget spinning-disk NAS | 4× native 2.5/3.5" SATA | Dual 2.5GbE |
| Beelink ME Pro N150 | Best hybrid 2-bay + SSD pool | 2× SATA + 3× M.2 | 5GbE + 2.5GbE |
| Minisforum N5 Air | Best all-round native NAS | 5× SATA + 3× M.2 | 10GbE + 5GbE |
| AOOSTAR WTR MAX | Maximum capacity and ECC | 6× SATA + 5× M.2 | Dual 10GbE SFP+ + dual 2.5GbE |
| GMKtec NucBox G9 N150 | Cheapest four-NVMe all-flash | 4× M.2 | Dual 2.5GbE |
| Beelink ME mini N150 | Smallest six-drive all-flash | 6× M.2 | Dual 2.5GbE |
| Minisforum MS-01 | Proxmox host with a real HBA | 3× M.2/U.2, PCIe 4.0 x8 | Dual 10GbE SFP+ + dual 2.5GbE |
| ZimaBoard 2 1664 | DIY builds that need PCIe | 2× SATA + PCIe 3.0 x4 | Dual 2.5GbE |
What Actually Makes a Mini PC a NAS
Native drive bays beat adapters. A SATA backplane or a genuine PCIe host bus adapter gives the operating system the disk directly: real serial numbers, SMART data, predictable reconnect behaviour. A USB-to-SATA bridge inserts a firmware layer between TrueNAS and the platters, and that layer is where UASP quirks, dropped enclosures and missing SMART readings come from. USB DAS is a workable compromise for a media share; it is a poor foundation for a primary ZFS pool.
Two network ports is the floor. One Ethernet port forces router-on-a-stick VLAN design if the box also does firewall duty, and it caps throughput at what a single link provides. Dual 2.5GbE is enough headroom to beat what a single hard drive can deliver sequentially, which is why it appears on every budget pick here. 10GbE only earns its cost when the pool itself can outrun 2.5GbE — striped or parity HDD arrays, all-flash volumes, several simultaneous clients, or VM datastores.
Idle power means nothing without the drive state. An "8 W NAS" that is quoted with zero drives installed tells you almost nothing about the box running with six HDDs spinning. Every figure in this guide is stated with its configuration: bare, partially populated, or fully populated and spinning. For a 24/7 machine, a constant 10 W difference is roughly 87.6 kWh a year and about 263 kWh over three years.
Memory architecture decides the ceiling. Soldered LPDDR5 is compact, fast and cheap to integrate, and it cannot be upgraded ever. Two DDR5 SO-DIMM slots let a box grow from a file server into a virtualization host. ECC is not a ZFS requirement — ZFS runs fine without it — but it removes one source of silent memory corruption, and it is worth having if the platform offers it at a sensible price.
The media engine matters more than the CPU tier. Intel Quick Sync is present from the N150 up to Core i5 and Core Ultra parts, and it is the most mature hardware-transcoding path in Plex and Jellyfin. AMD's Radeon 780M has more raw graphics capability and a fully capable hardware codec block, but its Linux software path is less predictable, with documented cases of Plex falling back to CPU for particular clients and container setups.
The OS and driver path has to be checked, not assumed. A 10GbE controller that needs an out-of-tree driver on an older kernel is a real obstacle for a Proxmox or TrueNAS install built on a stable distribution. Chipset reputation is a starting point; kernel version is what decides whether the interface comes up.
#1 AOOSTAR WTR Pro N150 — Best Budget NAS with Real 3.5-Inch Bays
Key specs
- Intel N150, 4 cores / 4 threads, up to 3.6 GHz, 24-EU Intel graphics with Quick Sync
- 4× native trays accepting 2.5-inch or 3.5-inch SATA drives
- Dual 2.5GbE
- 1× DDR4-3200 SO-DIMM, 32 GB maximum per current manufacturer specification; no ECC
- 1× M.2 2280 NVMe per current manufacturer documentation — some N150 retail listings advertise two; board and documentation revisions differ, so confirm the exact revision
- No full PCIe slot and no OCuLink
- External 19V/6.32A 120 W supply; approximately 228 × 150 × 185 mm
Measured power and noise. One independent review recorded roughly 9.3–18.7 W at idle depending on state and about 25–28 W under load without a full complement of drives. A Proxmox owner running two NVMe-class devices plus four drives reported around 21 W tuned idle and roughly 27 W during disk activity. Bare-system noise sat near 38 dBA and barely moved between idle and CPU load — once four HDDs are installed, the drives become the acoustic story, not the fans.
Why it earns a slot. Four native bays, dual 2.5GbE and a low-cost Quick Sync platform is the shortest path from a pile of drives to a working NAS. There is no USB bridge anywhere in the storage path, and buyers report running Proxmox with TrueNAS and Home Assistant alongside each other, passing individual disks through by stable /dev/disk/by-id identifiers while retaining SMART visibility. Passing the whole storage controller into a TrueNAS VM is the harder configuration and can introduce sensor and power-management complications.
Where it asks for patience. AOOSTAR's support area publishes WTR Pro N150 BIOS files, but the visible N150 entry is not recent, and the firmware-update story is less polished than an ASUS or enterprise platform. This is the current low-power branch of the WTR Pro line, not the older N100-only generation — verify the processor on the specific listing before buying.
Pros
- Four internal 3.5-inch bays at budget positioning
- No USB storage bridge in the primary pool
- Dual 2.5GbE exceeds single-drive sequential throughput
- Disk-level passthrough validated by Proxmox and TrueNAS owners
Cons
- M.2 slot count differs between manufacturer documentation and some retail listings
- No ECC, no PCIe slot, no OCuLink
- BIOS update cadence is behind the established vendors
Verdict. The most convincing low-cost entry into a proper spinning-disk NAS. If the plan is four large HDDs in a ZFS pool with Plex on top, this does the job without an adapter chain.
Perfect for: the buyer building a first four-bay TrueNAS or Unraid box on a budget.
#2 Beelink ME Pro N150 — Best Hybrid Two-Bay with an SSD Pool
Key specs
- Intel N150, 4 cores / 4 threads, up to 3.6 GHz, 24-EU Intel graphics up to 1 GHz with Quick Sync
- 2× SATA bays accepting 2.5-inch and 3.5-inch drives, documented up to 30 TB per bay
- 3× M.2 positions — one PCIe 3.0 x2, two PCIe 3.0 x1 — up to 4 TB per slot
- 5GbE Realtek RTL8126 plus 2.5GbE Intel I226-V
- 16 GB LPDDR5-4800 soldered; no ECC and no SO-DIMM upgrade
- External 19V/6.32A supply; 166 × 121 × 112 mm, approximately 2.1 kg
Measured power and noise. Around 15–16 W with no storage installed, 18–19 W with three NVMe drives, and roughly 22–23 W with two HDDs plus three NVMe drives in detailed testing. Peak draw landed near 41–46 W. Noise measured approximately 34–37 dBA at idle and around 38 dBA under heavier load across two independent tests.
Why it earns a slot. This is the most balanced compact NAS in the guide for anyone who needs bulk HDD storage and a fast SSD tier. The networking is genuinely unusual for the size: 5GbE plus 2.5GbE means the external link stops being the bottleneck for a two-drive mirror, and the three M.2 slots cover app data, containers and a cache or special-metadata vdev. In a NAS-focused review it played four simultaneous high-bitrate 4K Jellyfin streams with CPU utilisation staying low, which is exactly what a Quick Sync box should do.
Where it asks for patience. Only two HDD bays, so this is a mirrored-pair design, not a wide RAIDZ array. The M.2 slots are deliberately modest in lane width — one x2 and two x1 links — so premium PCIe 4.0 drives will not reach their rated throughput. The SATA trays handle live drives in testing, but hot-swap support is not officially established, so treat them as serviceable rather than hot-swappable.
Pros
- Real 2.5-inch and 3.5-inch support up to 30 TB per bay
- 5GbE networking above the category norm
- Three M.2 slots for an SSD services pool
- Compact chassis for a two-bay plus SSD layout
Cons
- Only two HDD bays
- Soldered 16 GB memory with no upgrade path
- No PCIe or HBA expansion
Verdict. The pick for a two-large-drive mirror plus an SSD pool, with networking quick enough that the drives, not the port, set the pace.
Perfect for: the buyer who wants two big mirrored HDDs plus fast NVMe services and cache in one small box.
#3 Minisforum N5 Air — Best All-Round Native NAS
Key specs
- AMD Ryzen 7 255, 8 cores / 16 threads; Radeon 780M integrated graphics with RDNA 3 media capability
- 5× SATA positions accepting 2.5-inch and 3.5-inch drives
- 3× M.2 NVMe slots, PCIe 4.0 class with lane widths varying by slot
- 10GbE plus 5GbE networking, Realtek controllers
- 2× DDR5-5600 SO-DIMM slots, 96 GB maximum per current documentation; ECC not documented
- OCuLink plus a physical PCIe expansion interface
- External 280 W adapter; approximately 199 × 202 × 252 mm, roughly 4 kg
Measured power. Owner reports sit around 20–24 W with one NVMe installed and no HDDs, dropping toward 14–15 W after newer-kernel and interface power tuning. A heavily expanded test configuration with five HDDs and a PCIe accelerator measured roughly 70 W with disks spinning and about 38 W spun down — the add-in card contributes materially to that figure, so it is not a clean stock-system number.
Why it earns a slot. Five native drive positions, three NVMe slots, 10GbE and 96 GB of memory capacity in one chassis is the strongest storage-first package here. The lane widths on the M.2 slots vary, which matters less than it sounds: a 10GbE NAS does not need four lanes per cache drive, and the architecture is better judged by drive count and network headroom than by peak SSD benchmarks.
Where it asks for patience. The Realtek RTL8127 10GbE controller required an out-of-tree driver on kernel 6.12 in independent testing, with native in-kernel support arriving around kernel 6.16; the 5GbE port was less troublesome. On a Proxmox or TrueNAS install pinned to an older kernel, plan for that. Plex is the other caveat — the Radeon 780M is an excellent Jellyfin and general-compute engine, but there are documented cases of Plex hardware acceleration falling back to CPU for particular native clients and container paths on this GPU class. That is a software-stack issue rather than a hardware defect, and it is worth testing before committing.
Pros
- Five HDD bays plus three NVMe slots
- 10GbE and 5GbE on board
- Two SO-DIMM slots with a 96 GB ceiling
- OCuLink and PCIe expansion for GPU or further storage
Cons
- Realtek 10GbE needs a current kernel or an external driver
- Plex on AMD hardware should be validated per client and container
- Substantially larger than the compact alternatives
Verdict. The best single chassis in this guide for a five-drive array with room to run VMs and containers beside it. Verify the 10GbE driver situation against the exact kernel before ordering.
Perfect for: the reader who wants one box doing five-drive storage, VMs, Docker and Plex or Jellyfin.
#4 AOOSTAR WTR MAX Ryzen 7 PRO 8845HS — Maximum Capacity with ECC
Key specs
- AMD Ryzen 7 PRO 8845HS, 8 cores / 16 threads; Radeon 780M integrated graphics
- 6× native 3.5-inch SATA bays, with current product material also describing 2.5-inch drive compatibility
- 5× M.2 2280 positions — launch material describes a mix of PCIe 4.0 x2 and x1 links rather than five full-width slots
- Up to 11 internal drives before any external expansion
- Dual 10GbE SFP+ plus dual Intel I226-V 2.5GbE
- 2× DDR5-5600 SO-DIMM slots, 128 GB maximum, with ECC support explicitly documented on the AMD model
- USB4 and OCuLink PCIe 4.0 x4, which is not hot-pluggable
- External 280 W supply; multi-fan internal cooling
Measured power and noise. Approximately 18 W bare with no drives, around 24 W with five NVMe SSDs, and roughly 52–53 W idle once six HDDs and five SSDs are populated. Heavy populated-system loads reached approximately 73–89 W. Noise sat around 35–38 dBA in ordinary states and roughly 43–44 dBA at maximum cooling — with six HDDs installed, drive acoustics dominate anyway.
Why it earns a slot. This is the only system in the roundup where ECC is a documented platform feature rather than a wish. For a ZFS build where data integrity is the point, that changes the calculus, and it is a legitimate high-end angle that most "mini PC NAS" roundups wrongly claim is unavailable in this size class. Eleven internal drive positions, dual 10GbE SFP+ and enough CPU for serious virtualization make it the densest compact platform here. AOOSTAR's own documentation has referenced both Intel 82599 and X710 for the 10GbE controller, so verify the shipping revision before choosing it for a specific driver path.
Where it asks for patience. Radeon 780M Plex behaviour carries the same caveat as the N5 Air: a NAS-oriented review ran four concurrent high-resolution Plex hardware streams successfully on this GPU class, but client- and container-specific VA-API fallback remains a real possibility. Treat four streams as demonstrated capability, not a guarantee. AOOSTAR also sells an Intel Core i5-1235U WTR MAX sibling; for a Plex-first appliance, Quick Sync may be the better trade even though the Intel version gives up the AMD model's ECC support.
Pros
- Six HDD bays plus five M.2 slots, up to eleven internal drives
- Documented ECC memory support
- Dual 10GbE SFP+ plus dual 2.5GbE
- USB4 and OCuLink expansion
Cons
- Populated idle draw above 50 W is a real running cost
- 10GbE controller identity is inconsistent across manufacturer documentation
- M.2 slots are not all full-width links
- Price sits in the premium tier
Verdict. The high-capacity, integrity-focused endgame for a compact NAS. Budget for the electricity and verify the network silicon on the revision shipping at purchase.
Perfect for: the reader consolidating a large multi-drive ZFS pool with VMs, containers and ECC into one compact chassis.
#5 GMKtec NucBox G9 N150 — Cheapest Route to Four Internal NVMe Drives
Key specs
- Intel Twin Lake N150, 4 cores / 4 threads, up to 3.6 GHz, 24-EU Intel graphics up to 1 GHz with Quick Sync
- 4× M.2 2280 NVMe positions, PCIe 3.0 class, documented up to 4 TB each and 16 TB total
- 64 GB eMMC boot storage
- Dual Intel I226 2.5GbE
- 12 GB LPDDR5 soldered, with up to 16 GB configurations listed by the manufacturer; no ECC, no SO-DIMM
- No SATA bays, no full PCIe slot, no OCuLink
- External 19V/3.42A USB-C-style supply; 146.6 × 100.25 × 38.75 mm
Measured power and noise. Independent comparison testing measured around 19–20 W at idle and 28–30 W at peak in the tested configuration, with noise below 40 dBA at idle and around 40 dBA under load.
Why it earns a slot. Four internal NVMe drives, dual 2.5GbE and Quick Sync in one small box is the least expensive way into an all-flash NAS with no USB bridge in the path. The value proposition is density and price, not bandwidth: the storage slots do not all expose desktop-class x4 links, so adding flagship PCIe 4.0 drives will not turn this into a four-drive workstation array. Framed correctly — a compact ZFS or Btrfs all-flash NAS for backups, apps, media and containers — it does exactly what it promises.
Where it asks for patience. Soldered memory is the long-term limitation. TrueNAS plus a handful of containers and a VM can outgrow 12 GB, and there is no upgrade path; a WTR Pro, N5 Air or MS-01 lets you add memory later. SSD airflow is weaker than on some competing all-flash boxes, so multiple NVMe drives running sustained scrubs or transfers need thermal attention. The Intel I226 controller has broad Linux support, but recent reports across I226-equipped N-series systems still include intermittent link and freezing behaviour — a platform-level caution rather than a confirmed defect in this model.
Pros
- Four internal NVMe positions with no external enclosure
- Dual Intel 2.5GbE
- Quick Sync for Plex and Jellyfin
- Compact footprint
Cons
- 12 GB soldered memory with no upgrade path
- M.2 lanes are not all full width
- No SATA bays, PCIe slot or OCuLink
- SSD thermals need monitoring under sustained load
Verdict. Buy it for all-flash density at the lowest cost in this guide, and accept that memory and lane width are fixed at purchase.
Perfect for: the reader building a quiet, compact all-flash box for backups, containers and media.
#6 Beelink ME mini N150 — Smallest Six-Drive All-Flash NAS
Key specs
- Intel N150, 4 cores / 4 threads, up to 3.6 GHz, Intel graphics with Quick Sync
- 6× M.2 2280 positions, up to 24 TB total; review-level inspection identifies one Gen3 x2 system slot and five Gen3 x1-class storage slots, with the system slot also accepting SATA M.2 media
- Dual Intel I226-V 2.5GbE
- 12 GB or 16 GB LPDDR5-4800 soldered; no SO-DIMM, no ECC
- No 3.5-inch bays, no full PCIe slot, no OCuLink
- Integrated power supply rather than an external brick
- Approximately 99 × 99 × 99 mm
Measured power and noise. Roughly 6.0–6.9 W bare and with no storage installed, about 16.9 W with six SSDs fitted, and approximately 28–31 W at peak in review testing. Noise measured roughly 31–34 dBA at idle and 37–40 dBA under full load. Sustained loading left the underside in the high-50s °C, so drive choice and airflow matter once all six slots are populated.
Why it earns a slot. Six internal drive positions in a 99 mm cube, with dual 2.5GbE and an integrated power supply, is the tidiest all-flash appliance in the roundup. Lower bare-system idle than the G9 in reviewed configurations and no external brick to hide makes it easy to place. The M.2-to-multi-SATA expansion route should not be assumed to work reliably here — power availability inside the chassis is the constraint, and the host, adapter firmware, ASPM behaviour and controller thermals all vary.
Where it asks for patience. Memory is permanently fixed at 12 GB or 16 GB, which caps how much the box can run alongside storage. The M.2 lanes are deliberately modest, so external 2.5GbE rather than drive speed is normally the bottleneck for large sequential copies — which is an argument for capacity-oriented, cool-running TLC or QLC drives rather than expensive flagship PCIe 5.0 parts the platform cannot expose.
Pros
- Six internal NVMe positions in a 99 mm chassis
- Integrated power supply, no external brick
- Low bare-system idle draw
- Dual Intel 2.5GbE
Cons
- Soldered memory, no upgrade path
- Narrow M.2 lane allocation
- Chassis underside runs warm under sustained load
- No HDD bays or PCIe expansion
Verdict. The all-flash appliance to buy when silence and physical density outrank capacity per drive and future upgradeability.
Perfect for: the reader who wants six SSDs and nothing spinning, in the smallest possible enclosure.
#7 Minisforum MS-01 Core i5-12600H — Best Proxmox Host for an External HBA
Key specs
- Intel Core i5-12600H, 12 cores / 16 threads, up to 4.5 GHz; Iris Xe-class integrated graphics with modern Quick Sync
- 3× M.2/U.2-capable storage positions, documented as PCIe 4.0 x4, PCIe 3.0 x4 and PCIe 3.0 x2 paths, with a U.2 conversion option
- No native SATA bays
- Physical PCIe 4.0 x16 slot wired up to x8 for a low-profile add-in card
- Dual 10GbE SFP+ plus dual 2.5GbE RJ45
- 2× USB4 ports
- 2× DDR5 SO-DIMM slots, 96 GB maximum per current specification; ECC not advertised
- External 180 W supply; approximately 196 × 189 × 48 mm
Measured power and noise. Roughly 25–29 W at idle, with short load peaks above 100 W and about 90–95 W sustained in independent review testing. Configuration and the choice of 10GbE optics or DACs affect idle consumption. Noise sat near 37–38 dBA at low load; this is not a fanless box and it becomes more audible under sustained workstation loads.
Why it earns a slot. The MS-01 qualifies as a NAS pick for one reason: the PCIe slot. A genuine IT-mode external SAS HBA attached there gives TrueNAS or Unraid direct disk visibility across a multi-bay JBOD chassis, which is architecturally different from hanging a five-bay USB enclosure off a faster desktop mini. Add three fast internal storage positions, dual 10GbE SFP+ and dual 2.5GbE, and you have a compact virtualization host that happens to be an excellent storage head.
Where it asks for patience. Idle draw is several times that of an N150 NAS, so the extra CPU, 10GbE and PCIe capability has to be used to justify it. For a two-user Plex server and a file share, it is wasteful. It is also a 48 mm-tall chassis: too tall for a nominal 1U rack slot, so plan on a 2U tray or a shelf.
Pros
- PCIe 4.0 x16 physical slot wired to x8 for an HBA or NIC
- Dual 10GbE SFP+ plus dual 2.5GbE
- Three internal storage positions with U.2 support
- Proven Proxmox plus virtualized TrueNAS deployment pattern
Cons
- No native HDD bays
- 25–29 W idle is heavy for a storage box
- Audible under sustained workstation load
- Premium positioning
Verdict. The right answer when the NAS is one workload among several on a Proxmox host that needs real PCIe expansion. The wrong answer if the only job is serving files.
Perfect for: the homelab builder running Proxmox with an external HBA, VMs, containers and CI on the same machine.
#8 IceWhale ZimaBoard 2 1664 — Best DIY Platform with Real PCIe
Key specs
- Intel N150, 4 cores / 4 threads, up to 3.6 GHz with Quick Sync
- Fixed 16 GB LPDDR5-4800 and 64 GB eMMC onboard
- 2× native SATA connectors for 2.5-inch or 3.5-inch drives using the supplied cable and rack arrangement
- PCIe 3.0 x4 expansion slot — the differentiator, allowing a genuine HBA, additional NVMe storage or a faster NIC
- Dual 2.5GbE
- External 12V/5A 60 W supply
- Exposed board design; drives and cooling typically need a rack or enclosure
Measured power and cooling. Roughly 7 W bare-board idle and about 16 W at full CPU load in one test; another configuration with two SATA drives measured around 6.8–6.9 W at low activity and 20–25 W during 4K playback, with populated HDD configurations observed around 11–13 W idle. Passive operation can be silent, but sustained stress pushed the SoC toward 90 °C in testing — active cooling is the sensible choice for a permanently loaded server.
Why it earns a slot. The PCIe 3.0 x4 slot solves the problem generic mini PCs cannot solve cleanly. Instead of putting the primary pool behind a USB bridge, you install a real SATA or SAS HBA. That makes the ZimaBoard 2 flexible well beyond NAS duty: it can be a storage head, a firewall with a proper multi-port NIC, or a build with faster networking than 2.5GbE. It ships with ZimaOS Plus, and IceWhale explicitly lists CasaOS, Linux, OpenMangeVault, Unraid, Home Assistant OS, TrueNAS, OpenWrt, pfSense and Windows among supported possibilities.
Where it asks for patience. It is not an appliance. Drives are exposed unless you buy the rack arrangement or supply your own enclosure, the memory is fixed at 16 GB, and a TrueNAS install must account for the entire boot device being dedicated to the operating system — spare capacity on the boot disk cannot join the pool. Price it against the WTR Pro deliberately: the WTR Pro is cleaner for four HDDs out of the box; the ZimaBoard 2 is more flexible when PCIe expansion, firewall duties or unusual NICs are part of the plan.
Pros
- PCIe 3.0 x4 expansion for a genuine HBA or NIC
- Two native SATA connectors
- Very low bare-board idle draw
- Broad documented OS support
Cons
- Exposed board requires a rack or enclosure
- 16 GB soldered memory, no upgrade
- Passive cooling needs help under sustained load
- Assembly and configuration burden falls on the buyer
Verdict. The pick for readers who would rather build than buy. The PCIe slot is worth more than the CPU here.
Perfect for: the DIY builder who wants an HBA-backed pool, a custom enclosure and an open operating-system choice.
Comparison Table
| Product | Architecture | CPU | Drive positions | Networking | Memory | Tier |
|---|---|---|---|---|---|---|
| AOOSTAR WTR Pro N150 | Native HDD NAS | Intel N150 (4C/4T) | 4× 2.5/3.5" SATA, 1× M.2 | Dual 2.5GbE | 1× DDR4-3200 SO-DIMM, 32 GB | Budget |
| Beelink ME Pro N150 | Hybrid 2-bay + SSD | Intel N150 (4C/4T) | 2× 2.5/3.5" SATA, 3× M.2 | 5GbE + 2.5GbE | 16 GB LPDDR5 soldered | Mid |
| Minisforum N5 Air | Native NAS + expansion | Ryzen 7 255 (8C/16T) | 5× 2.5/3.5" SATA, 3× M.2 | 10GbE + 5GbE | 2× DDR5-5600, 96 GB | Mid-premium |
| AOOSTAR WTR MAX | Maximum capacity | Ryzen 7 PRO 8845HS (8C/16T) | 6× 3.5" SATA, 5× M.2 | Dual 10GbE SFP+ + dual 2.5GbE | 2× DDR5-5600, 128 GB, ECC | Premium |
| GMKtec NucBox G9 N150 | All-flash NVMe | Intel N150 (4C/4T) | 4× M.2 | Dual 2.5GbE | 12 GB LPDDR5 soldered | Budget |
| Beelink ME mini N150 | Compact all-flash | Intel N150 (4C/4T) | 6× M.2 | Dual 2.5GbE | 12–16 GB LPDDR5 soldered | Budget-mid |
| Minisforum MS-01 i5 | Compute host + HBA | Core i5-12600H (12C/16T) | 3× M.2/U.2, PCIe 4.0 x8 slot | Dual 10GbE SFP+ + dual 2.5GbE | 2× DDR5, 96 GB | Premium |
| ZimaBoard 2 1664 | DIY PCIe platform | Intel N150 (4C/4T) | 2× SATA, PCIe 3.0 x4 | Dual 2.5GbE | 16 GB LPDDR5 soldered | Mid |
Recommended Upgrades and Accessories
Memory for the DDR5 systems. A 2×32 GB DDR5-5600 SO-DIMM kit is the right capacity match for the Minisforum N5 Air and the MS-01, both of which expose two SO-DIMM slots and support 96 GB. Note that this kit is non-ECC, so it is the wrong choice for a WTR MAX build that is deliberately using the AMD model's documented ECC support — pick ECC modules for that machine instead.
SSDs for the all-flash boxes. A 4 TB M.2 2280 NVMe drive is a sensible capacity-per-slot choice for the ME mini and the G9, and the P3 Plus family appears on Beelink's known-compatible list for the ME mini. The reason to pair it with these platforms is capacity, availability and cool running rather than benchmark speed — individual slots in these chassis are narrower than the drive's PCIe 4.0 x4 interface, and external 2.5GbE caps bulk transfers long before the SSD does.
External HBA for the MS-01. An IT-mode external SAS HBA in the 9300-8e or 9305-8e class is the component that turns the MS-01's PCIe slot into a real multi-bay storage head, giving TrueNAS or Unraid direct disk visibility instead of a USB bridge in the path. This market contains a large volume of used and reflashed cards, so verify the controller, the firmware mode and the cable type rather than buying whichever listing appears first.
Which Mini PC for NAS Should You Buy?
Four or more bulk HDDs on a budget: the AOOSTAR WTR Pro N150. Native bays, dual 2.5GbE and Quick Sync, with no adapter chain in the storage path.
A two-drive mirror with a fast SSD tier: the Beelink ME Pro N150. Two 3.5-inch bays up to 30 TB each, three M.2 slots and 5GbE networking.
One box doing storage, VMs, containers and media: the Minisforum N5 Air. Five SATA bays, three M.2 slots, 10GbE and 96 GB of memory headroom — provided the Realtek 10GbE driver is matched to the kernel.
Maximum local capacity with ECC: the AOOSTAR WTR MAX. Eleven internal drive positions and documented ECC support, at the cost of an idle draw above 50 W when fully populated.
All-flash on the smallest budget: the GMKtec NucBox G9 N150. Four NVMe positions and dual 2.5GbE, with soldered memory fixed at purchase.
All-flash in the smallest space: the Beelink ME mini N150. Six NVMe positions in a 99 mm cube with an integrated power supply.
Proxmox first, storage second: the Minisforum MS-01. A PCIe 4.0 x16 slot wired to x8 for an external HBA, plus dual 10GbE SFP+.
Building it yourself: the IceWhale ZimaBoard 2 1664. A PCIe 3.0 x4 slot, two SATA connectors and a wide documented OS list.
Plex-first buyers should note one thing. If the primary workload is transcoding media for a couple of clients, an N150 Quick Sync system is the safer appliance than a more powerful Ryzen box, even though its CPU benchmark is a fraction of the size. AMD's Radeon 780M is a stronger compute engine and works well with Jellyfin, but Plex's Linux path on AMD hardware is the one that still produces client- and container-specific fallbacks to CPU. Pick Intel for Plex, and pick AMD when virtualization, compilation, game servers or Docker density justify the extra cores.
Frequently Asked Questions
Q: Do I need ECC memory for a NAS running ZFS?
No. ZFS does not require ECC and runs correctly without it. ECC reduces one additional source of silent memory corruption, which is why data-integrity-focused builds prefer it, but the checksums, snapshots and redundancy that make ZFS valuable work regardless. Among the systems in this guide, only the AOOSTAR WTR MAX Ryzen model documents ECC support — the N-Series and MS-01 platforms do not advertise it.
Q: How many simultaneous 4K Plex transcodes can an N100 or N150 NAS handle?
A conservative working range for a properly configured Quick Sync system is roughly two to four concurrent 4K-to-1080p hardware transcodes, with more possible under favourable codec and subtitle conditions. The number collapses quickly if the workload bypasses the media engine: subtitle burn-in of image-based formats, unsupported audio or video codecs, HDR tone mapping and software fallback all push work back onto the CPU. Treat any fixed stream count as workload-dependent rather than a specification.
Q: Can a mini PC with one M.2 slot and a USB drive enclosure work as a NAS?
Yes, and plenty of Unraid and media-server builds run exactly that way. The compromise is that the storage stack then depends on the USB-to-SATA bridge for drive serial numbers, SMART passthrough, UASP behaviour and reconnection handling. For a media share that is tolerable; for a primary ZFS or TrueNAS pool it is a weaker foundation than native SATA bays or a genuine PCIe HBA, which is why the MS-01 and ZimaBoard 2 qualify as NAS picks despite having no drive trays at all.
Q: Is 10GbE worth paying for on a mini NAS?
It depends on the pool behind it. 2.5GbE already exceeds what a single hard drive can typically serve sequentially, which is why it is the sensible baseline for four-bay boxes. 10GbE starts earning its cost with multi-drive striped or parity arrays, all-flash storage, several simultaneous clients, workstation backups or VM datastores. On a five- or six-drive machine with SSDs involved, the network becomes the bottleneck without it.
Q: How much power does a mini NAS actually draw?
It depends almost entirely on drive state, which is why bare-system figures mislead. As reference points: the Beelink ME mini measured roughly 6–7 W bare and about 17 W with six SSDs; the ME Pro around 15–16 W bare and 22–23 W with two HDDs plus three NVMe drives; the WTR Pro about 21 W in one tuned multi-drive configuration; and the WTR MAX around 18 W empty against 52–53 W with six HDDs and five SSDs installed. A constant 10 W difference equals roughly 87.6 kWh a year.
Q: Does TrueNAS need a dedicated boot device?
Yes — TrueNAS dedicates the entire boot device to the operating system, and spare capacity on that disk cannot be added to the storage pool. Plan boot storage accordingly, and check compatibility against the exact TrueNAS SCALE release before assuming an onboard eMMC device is the preferred boot medium. This catches out ZimaBoard 2 builders in particular, where the 64 GB of onboard eMMC is an obvious boot candidate.
Q: Which is better for Plex, Intel Quick Sync or AMD Radeon 780M?
Quick Sync is the more mature and more predictable path. Intel's hardware transcoding is well established from the N150 upwards, which is why low-power N-series NAS boxes are credible Plex appliances. Radeon 780M has more graphics capability and a fully capable hardware codec block, and it works very well with Jellyfin, but reports on Radeon 780M-class systems show Plex hardware acceleration falling back to CPU for particular native clients and container paths. If Plex is the primary job, choose Intel; if the machine also does virtualization and general compute, the AMD systems justify themselves elsewhere.
Q: Can one mini PC be both a router and a NAS?
It can, but network port count decides how cleanly. A single-Ethernet box requires VLAN trunking through a managed switch to separate WAN and LAN, which adds a dependency and complicates recovery. Dual-NIC systems — the WTR Pro, ME Pro, G9, ME mini, N5 Air and ZimaBoard 2 all qualify — allow straightforward physical separation, and the ZimaBoard 2's PCIe slot additionally allows a multi-port network card instead of relying on onboard ports.
Conclusion
The mini PC NAS category has matured to the point where storage topology, not CPU tier, should drive the purchase. Four native 3.5-inch trays and dual 2.5GbE on a low-power Intel platform will serve a home media library better than a faster desktop mini tethered to a USB enclosure, and the all-flash side of the market now offers four to six internal NVMe positions in enclosures the size of a coffee cup. The one constant is that the media engine, not the benchmark score, decides which box makes a good Plex or Jellyfin appliance.
The buying decision reduces to a short set of questions. How many drives, and spinning or solid state? Which operating system, and does its kernel support the network controller on the revision being shipped? How much idle power is acceptable at 24/7? And does the machine need to grow into virtualization, or is it a file server for the next five years? Answer those, and the ranking above resolves itself fairly cleanly.
For most first-time builders, the AOOSTAR WTR Pro N150 is the sensible starting point: native bays, no bridge in the storage path, and enough Quick Sync to run media alongside the pool. For everything beyond that — more bays, ECC, 10GbE, PCIe expansion — the higher tiers are there and the extra money buys real capability rather than a faster processor in a smaller box.
→ Check the current price of the AOOSTAR WTR Pro N150 on Amazon



