FANPEEC Fanless N100 Mini PC (FAH3)

The 128GB mSATA drive is the weak spot, not the platform. Windows 11 Pro and its update cache take a large share of it, so the sensible plan is to treat it as a starter drive:

1. Add an NVMe SSD in the M.2 slot and clone or reinstall Windows onto it. NVMe is the fastest interface in the box; mSATA tops out at SATA's roughly 550MB/s.
2. Keep the mSATA as a scratch or backup volume, or pull it for a larger mSATA module.
3. Fit a 2.5-inch drive for bulk storage: a 2TB laptop HDD for media, or a SATA SSD for fast shared files. Check the thickness first; 9.5mm drives will not fit.

Memory follows the same pattern. The 8GB stick sits in a standard 260-pin DDR4 SO-DIMM slot rated for 3200MHz and up to 32GB. The N100 has a single memory channel, so one module is the full configuration, not a half-populated one.

Adding a 16GB or 32GB module is a five-minute job with a screwdriver, and the DDR4 SO-DIMM format is the cheapest and most common laptop memory around. A spare 8GB stick from an old laptop works too, as long as it is DDR4.

The rest of the management feature set supports unattended duty:

• Watchdog timer: reboots the system if the OS hangs, which matters on a kiosk nobody watches.
• Wake-on-LAN and PXE boot: remote power-on and network installs across a fleet.
• TPM 2.0: meets the Windows 11 requirement and enables BitLocker drive encryption.
• Wi-Fi 6 and Bluetooth 5.2: for sites with no cable run, plus wireless scanners and keyboards.

Dual Gigabit Ethernet makes it a capable small firewall for connections up to 1Gbps. One port faces the modem, the other the LAN switch, and pfSense, OPNsense or OpenWrt run comfortably on four Gracemont cores with AES-NI for VPN work. Above a gigabit plan, a box with Intel i226 2.5GbE ports is the better tool; those line up in the N100 firewall mini PC guide.

Two ports also help a plain desktop. One can sit on the office network while the second connects a machine, camera or instrument on an isolated segment, a common pattern on factory floors.

Serial setup is old-school but simple. Windows lists the ports as COM1 and COM2 in Device Manager; Linux exposes them as /dev/ttyS0 and /dev/ttyS1. Match the baud rate, data bits and parity to the device, and remember that RS232 runs at higher voltages than the 3.3V TTL serial on hobby boards. A microcontroller needs a level shifter, not a direct wire.

Passive cooling has rules. The case gets warm to the touch under sustained load, which is normal for a fanless design. Under long all-core loads the chip can hold lower clocks than a fan-cooled twin, depending on room temperature and airflow around the case. Give it space:

• Mount it on the included VESA plate with air on all sides, not jammed against a hot TV panel.
• Keep it out of closed drawers and sealed cabinets without ventilation.
• Stand it so the fins run vertically if the case allows, which helps convection.

Video is generous for an industrial box. Two HDMI 2.0 ports and a DisplayPort 1.2 output drive three 4K@60Hz displays at once, useful for multi-screen signage, a control room wall or an office desk. The UHD Graphics decodes H.264, HEVC, VP9 and AV1 in hardware, so looping 4K signage video costs little CPU time.

Running costs stay small for an always-on machine. At an average draw of 10W, a box uses about 88kWh a year; the real figure moves with the drives fitted, screen activity and how long the CPU spends in turbo. A 3.5-inch-drive NAS or an old tower draws several times that.

Fanless N100 choices from other makers, including smaller consumer designs, are compared on the fanless N100 mini PC page.

The FAH3 is the better choice for triple-screen use and modern wireless out of the box. The HISTTON makes sense where a VGA monitor or a 4G modem is part of the job. The VENOEN matches the FAH3's outputs closely, so the memory and drive fitted at purchase decide between those two.

For a quiet desk rather than a factory, the MeLE Quieter 4C is the consumer alternative: smaller, 16GB fitted, but with soldered memory and no RS232. MeLE's full lineup is on the MeLE N100 mini PC page.

• Count displays: three 4K screens need the FAH3 or VENOEN; one VGA panel points to the HISTTON.
• Plan the system drive: budget an NVMe SSD if Windows is the main job.
• List serial devices: two COM ports cover most tills and machine controllers; more need a USB adapter.