Intel N100 Mini PC Motherboard: Mini-ITX NAS Boards and Barebone Kits

That changes the shopping. You pick a board for its slots and ports, and the processor comes with it. The chip will never be swapped, so the board's layout is the whole upgrade path.

Three kinds of N100 platform exist.

• Mini-ITX NAS boards such as the HKUXZR, with many SATA ports and 2.5GbE for a home storage server.
• Industrial boards such as the ECS ADLN-I and the UDPTCP board, with serial, parallel, LVDS and GPIO for machines and kiosks.
• Barebone kits: finished mini PCs and firewall boxes sold without memory, storage or an operating system.

A board needs more parts than a kit. Budget for a Mini-ITX case, a power supply, one SO-DIMM of the right generation and your drives. The HKUXZR board wants a standard ATX 24-pin plus 4-pin connection, so an SFX or small ATX supply fits.

The rest follows Intel's spec: four cores up to 3.4GHz, a 6W base power rating, one memory channel and nine PCIe 3.0 lanes. The N100's full specification covers the chip itself.

Typical costs are easy to add up. An Intel i226-V 2.5GbE controller uses one lane. A JMB585 SATA controller, which adds five ports, uses two. An M.2 slot wired at x1 uses one, and at x4 uses four.

On the HKUXZR board that means two NICs, the JMB585, two x1 NVMe slots and a native SATA port before the PCIe slot gets anything. A full four-lane slot on top of that adds up to more than nine lanes, so the slot is very likely narrower electrically or shares lanes with something else.

• Fine at x1: a SATA SSD cache, a Coral accelerator, a second 2.5GbE card.
• Wants x2 or more: a 10GbE card, an HBA for many more drives, a fast NVMe adapter.
• Ask first: the lane map, before buying a card that needs full width.

SATA bandwidth is rarely the limit for spinning disks. Two lanes of PCIe 3.0 give the JMB585 roughly 2GB/s, more than five hard drives can stream together. A single 2.5GbE port tops out near 300MB/s, so the network, not the SATA controller, sets NAS transfer speed.

For boxes that spend their lanes on network ports instead, see the four- and six-port N100 firewalls.

A sensible build runs in this order.

1. Case: a Mini-ITX NAS case with four to six hot-swap or fixed 3.5-inch bays.
2. Power supply: an SFX or small ATX unit with a 24-pin and a 4-pin CPU connector; the board needs both to start.
3. Memory: one DDR5 SO-DIMM, 16GB for TrueNAS or Unraid, 32GB for ZFS with several VMs.
4. Boot drive: a small NVMe SSD in one M.2 slot; the second slot can hold a cache or app drive.
5. Data drives: up to six on SATA, with SATA1 on the chip's own controller.

First boot takes patience. The maker notes that memory training can take a few minutes on first power-on, with a blank screen, before the BIOS appears. Hold DEL to enter setup.

Memory is non-ECC and single-channel, which suits a home NAS but not a system that demands ECC. ZFS runs fine without it on a home server; weigh that choice before you trust irreplaceable data to it.

The same board sells in N100 and N150 versions. For a NAS the gap is small, since the drives and network set the pace. NAS, Plex and Proxmox on an N100 covers the software side.

The ZOTAC ZBOX CI337 Nano is the desktop example. It is fanless, with a 2.5-inch drive bay and an M.2 slot that takes NVMe at PCIe 3.0 x1 or SATA, dual gigabit LAN, Wi-Fi 6, two HDMI 2.0 ports, DisplayPort 1.4 and DP over USB-C. It suits a quiet office PC or a small file server where you want to pick the SSD yourself.

Most other N100 barebones are firewall appliances.

• CWWK: 4x Intel i226-V, a DDR5 SO-DIMM slot, and an M.2 NVMe x4 slot that splits into two x1 drives through an adapter.
• Dozlzyp: fanless, 4x i226-V, DDR5 up to 32GB and two NVMe slots.
• Montvfieto and oaknode: fanless four-port boxes with DDR5, a SATA port and support for one to four NVMe drives.
• UDPTCP industrial: 4x 2.5GbE, DDR4, two RS232 ports and 8 GPIO.

Check the memory generation before ordering RAM. The CWWK, Dozlzyp, Montvfieto and oaknode boxes take DDR5 SO-DIMMs; the UDPTCP industrial box takes DDR4. A laptop stick of the wrong generation will not fit the slot.

Barebones also dodge a common cost: a bundled Windows licence you may not need for OPNsense, Proxmox or Linux.

Count the parts. A board build adds a case, a power supply and cables, and the whole system draws more at idle than a mini PC with the same chip, because ATX supplies are inefficient at a few watts of load. A finished N100 box includes all of it, with one warranty.

• One or two drives: buy a mini PC. Many, like the OUMAX dual-LAN box, have two M.2 slots; others add a 2.5-inch bay.
• Three to six drives: the HKUXZR board in a NAS case.
• Serial devices, LVDS panels, a printer port: the ECS or UDPTCP industrial board.
• A router: a firewall barebone, not a motherboard.
• Your own RAM and SSD, no DIY: a barebone kit such as the ZOTAC CI337 Nano.

Idle power is the running cost to watch on a DIY NAS. Spinning disks draw several watts each, which dwarfs the N100's own share. Spin-down settings and an efficient power supply matter more than the board.

If you land on a finished box, the N100 mini PC price bands by memory and storage show what each configuration should cost.