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OUMAX Dual-LAN N100 Mini PC
N100 mini PC · 2× gigabit LAN · internal PSU

OUMAX Dual-LAN N100 Mini PC

An N100 box that does two things most rivals skip: it puts the 45W power supply inside the case, and it gives you two Ethernet ports and two M.2 slots. The radios are a generation behind; the plumbing is ahead.

  • ProcessorIntel N100, 4C/4T, up to 3.4GHz
  • Memory16GB DDR4
  • Storage512GB PCIe SSD + free M.2 slot
  • Network2× gigabit LAN, Wi-Fi 5, BT 5.0
  • PowerBuilt-in 45W supply
  • Size4.72 × 4.72 × 1.4 in
Buy it for
  • A two-port router, bridge or firewall on a gigabit connection
  • A small home server that needs a second SSD inside the case
  • Tidy desks where an external power brick is unwelcome
Skip it for
  • 2.5G networks: both ports are 1000Mbps
  • Wi-Fi 6 households that want the fastest wireless link
See today’s price

A built-in 45W supply leaves no power brick behind the desk

Almost every N100 mini PC runs from an external adapter, a plastic brick on the floor with a thin DC lead to the box. The OUMAX puts a 45W power supply inside its 4.72 × 4.72 × 1.4-inch case instead. A mains cable goes straight into the back, and that is the whole power setup.

45W is ample headroom for an N100. Intel rates the chip at 6W base power, and even with the turbo engaged, two SSDs and USB devices attached, a box like this draws well under that ceiling. The margin keeps the supply cool and quiet.

  • Tidier install: no brick to hide, hang or trip over, which matters behind a TV or in a network cabinet.
  • Nothing to lose: a proprietary DC adapter is the part that goes missing when a box moves between rooms.
  • One trade-off: if the internal supply fails, the box goes in for repair, whereas a failed external brick is swapped in a minute.
  • Heat inside: the supply adds a little warmth to the case, which the cooling system has to carry.

OUMAX handles that heat with a heat pipe, a large heatsink and a low-noise fan. The fan is the price of fitting a PSU and a second SSD into a 120 mm square; this is not a silent box, but OUMAX tuned it for quiet running rather than raw airflow.

Under the heatsink is the familiar N100: four cores, four threads, a 3.4GHz turbo, 6MB of cache and Intel UHD graphics driving two HDMI outputs at 4K and 60Hz. The N100's media engine handles H.264, HEVC, VP9 and AV1 decoding in hardware, so a 4K stream plays without loading the CPU.

Hardware

What’s inside

SpecValue
ProcessorIntel N100 (12th Gen Alder Lake-N), 4 cores / 4 threads, up to 3.4GHz
Cache6MB
GraphicsIntel UHD Graphics
Memory16GB DDR4
Storage512GB M.2 2280 PCIe SSD (PCIe x4 slot)
Second storage slotM.2 2280 PCIe x1, empty
Maximum storageUp to 4TB across both slots
Video out2× HDMI, 4K@60Hz each
USBUSB 3.2
Ethernet2× 1000Mbps RJ45
Wi-FiWi-Fi 5
Bluetooth5.0
CoolingHeat pipe, large heatsink, low-noise fan
Power supplyBuilt-in 45W, no external adapter
Size4.72 × 4.72 × 1.4 in (about 120 × 120 × 36 mm)

Two M.2 2280 slots: PCIe x4 for the system, PCIe x1 for data

Storage is the OUMAX's quiet advantage. The shipped 512GB SSD sits in an M.2 2280 slot wired for PCIe x4, and a second M.2 2280 slot on PCIe x1 is left empty for a drive of your own. Across both, OUMAX rates the box for up to 4TB.

The lane split follows from the chip. The N100 has nine PCIe 3.0 lanes to share between storage, network controllers and Wi-Fi. Four go to the system drive, one to the second slot, and the rest serve the two Ethernet controllers and the wireless card.

  1. PCIe 3.0 x4 slot: up to roughly 3.9GB/s, the right place for the operating system and apps.
  2. PCIe 3.0 x1 slot: up to roughly 1GB/s, still faster than a SATA SSD's 600MB/s ceiling, and well matched to a gigabit network.
  3. Total: up to 4TB between the two, for example the stock 512GB plus a larger data drive.

That second slot is what makes the OUMAX a better home server than most single-slot boxes. The OS stays on the fast drive, while media, backups or a Nextcloud data folder live on the second. A gigabit link moves about 118MB/s at best, so the x1 slot never becomes the bottleneck for network file sharing.

Mirroring: two drives also allow a software mirror (a ZFS or Btrfs mirror, or RAID 1 in TrueNAS or Proxmox) so one SSD can fail without losing data. The mirror runs at the speed of the slower x1 slot, which is fine for a file server.

Memory is 16GB of DDR4. In a box this size DDR4 is normally a SO-DIMM stick rather than soldered chips; check the internal photos if a later upgrade matters.

Market position

How it fits the lineup

N100 mini PC models by type, September 2026. Highlighted: OUMAX Dual-LAN N100 Mini PC.

Dual gigabit LAN for a router, a bridge or a split network

Two RJ45 ports turn a mini PC into a network appliance. The OUMAX's pair runs at 1000Mbps each, which is enough to route a gigabit internet connection at full speed and to keep two networks apart on one machine.

Common two-port builds:

  • Router or firewall: WAN on one port, LAN on the other, running OPNsense, pfSense or OpenWrt. The N100 has AES-NI for fast VPN encryption.
  • Home server with a split network: one port on the main LAN, one on a separate network for cameras or IoT devices.
  • Proxmox host: one port for management, one bridged to virtual machines.
  • Transparent bridge: an inline filter such as a Pi-hole or traffic monitor sitting between the modem and the router.

The limit is speed. Both ports are gigabit, not 2.5G, so a multi-gigabit fibre plan or a 2.5G switch will not see its full rate. For those, a four-port 2.5GbE box from the N100 firewall range is the right hardware.

Wireless is a generation old. Wi-Fi 5 and Bluetooth 5.0 work well for a desk PC and for keyboards and mice, but a router build will not use the Wi-Fi card for access-point duty anyway; the wired ports carry the load. For server use, the N100 home server setups map out service mixes that fit 16GB comfortably.

Power at the wall stays low for an always-on router. N100 boxes typically idle in single-digit watts, varying with BIOS settings and attached drives, and the N100 power consumption figures give the ranges.

Other options

Three other routes

The OUMAX next to ZOTAC's CI337, HEIGAOLAPC and the S12 Pro

Three alternatives cover what the OUMAX does not. ZOTAC's CI337 nano keeps two gigabit ports and drops the fan. HEIGAOLAPC's firewall box goes to four 2.5G ports. Beelink's Mini S12 Pro trades the second port for 2.5G speed and Wi-Fi 6.

OUMAXZOTAC CI337HEIGAOLAPCBeelink S12 Pro
Ethernet2× gigabit2× gigabit4× 2.5G1× 2.5G
CoolingFanFanlessFanlessFan
Memory16GB DDR4None, add your own8GB16GB DDR4
Storage512GB + free M.2M.2 + 2.5-inch bay128GB + M.2500GB M.2
PowerInternal 45WExternalExternalExternal

The ZOTAC ZBOX CI337 nano is the silent dual-LAN option, sold without memory or storage. The HEIGAOLAPC four-port firewall suits a real multi-port router. The Beelink Mini S12 Pro is the better desk PC with its faster radio and four 10Gbps USB ports.

The OUMAX sits between them. It is the only one of the four that ships ready to run with 16GB, an SSD and two Ethernet ports, and the only one with its power supply inside the case. The ZOTAC needs parts, the HEIGAOLAPC ships with half the memory, and the Beelink has one port. For a first router-plus-server box on a gigabit connection, that combination is hard to match.

Pick the OUMAX when:

  • You want two Ethernet ports and a ready-to-run box with 16GB and an SSD.
  • A second internal SSD matters for a server or backup role.
  • The desk or cabinet has no room for a power brick.
FAQ

Owner questions

Are the OUMAX's Ethernet ports 2.5G?

No. Both are 1000Mbps gigabit ports. They route a gigabit internet connection at full speed but will not reach 2.5G.

Does the OUMAX need an external power adapter?

No. It has a built-in 45W power supply, so a mains cable plugs straight into the case.

Can I add a second SSD to the OUMAX N100?

Yes. There is an empty M.2 2280 slot on PCIe x1 next to the PCIe x4 system slot, with up to 4TB supported across both.

Can it run OPNsense or pfSense?

Yes. Two gigabit ports cover a WAN and a LAN, and the N100 supports AES-NI for VPN encryption.