GMKtecMini PC reference
GMKtec NucBox M3
GMKtec NucBox M3 combines Intel Core i5-12450H with integrated Intel UHD Graphics for office multitasking, development and media work. Gaming and GPU-accelerated applications depend on their settings and driver support; the graphics specification alone is not a measured performance result. Replaceable SO-DIMM memory gives it a path for later RAM upgrades.
- Processor
- Intel Core i5-12450H
- Graphics
- Intel UHD Graphics
- Memory
- Not included
- Storage
- Not included
Prices across stores
MiniPC.guru compares retailer listings. Purchases are completed on the retailer’s website.
| Retailer | Availability | Listed price | Last checked | Retailer website |
|---|---|---|---|---|
 | Not confirmed | See at storeCheck expired | View at GMKtec |
Availability reflects the latest store check. Shipping, tax, coupons and checkout totals are not included; confirm them at the store.
Specifications
Processor, graphics and installed memory/storage describe the selected configuration. Expansion limits and connectivity describe the model; optional hardware is identified separately. References are collected in About this data below.
- Processor
- Intel Core i5-12450H
- Graphics
- Intel UHD Graphics
- Memory
- Not included
- Storage
- Not included
- Ports & displays
- USB-A: 3 × USB 3.2 Gen2 + 1 × USB 2.0; HDMI: 2 × HDMI (up to 4096 × 2160 @ 60Hz); USB-C: 1 × Type-C (DisplayPort / Data only, 5Gbps); Audio: 1 × 3.5mm CTIA Audio Jack; LAN: 1 × RJ45 2.5G Ethernet; Power: 1 × DC IN (5.5 / 2.5mm) USB-C does not support PD charging or an external GPU.
- Ethernet, Wi-Fi & Bluetooth
- Wi-Fi 6 (Realtek 8852BE, up to 1201Mbps); Bluetooth 5.2; 2.5G Ethernet LAN (Intel i225) Link rates are theoretical, not measured throughput.
- RAM & storage upgrades
- 2 × SO-DIMM Slots; Dual-Channel DDR4-3200 Memory; 16GB / 32GB configurations; Supports up to 64GB. 1 × M.2 2280 PCIe SSD slot, supports up to 2TB; 1 × M.2 2242 SATA SSD slot, supports up to 2TB
- Power supply & power limits
- Power supply / DC input rating: DC Power Adapter 20V / 5A, 100W. This is a supply rating, not measured wall-power consumption.
- Dimensions & weight
- 114 × 106 × 42.5 mm; 361 g. Dimensions follow the manufacturer order; axes are not labeled.
What owners say
Four reviewers had this Core i5-12450H box, including one who bought his own, and they split on whether it is worth its power draw. Notebookcheck calls the fan its worst trait: it pulses far more than most, spiking to 39 dB(A) as apps launch and reaching 37 to 43.5 under load; a Japanese owner-reviewer says his fan normally stays off, and the home-lab reviewer calls it extremely quiet by server standards. Under Prime95 the chip holds 45 W for about ten seconds, then settles at 35 W and 1.8 GHz to stay near 75 °C, and idle draw is 10.6 to 12.5 W, which led Notebookcheck to conclude it is not fast enough over cheaper U-series machines to justify the power and noise; TechRadar called it one of the best mini PCs it had tested. The USB-C port is sold with DisplayPort, but none of the lab's monitors got a picture. For home labs the news is mixed: Proxmox 8 powered the machine off mid-install, ESXi needs a boot option to avoid a purple-screen crash, and the Intel 2.5GbE port works in ESXi 8. A second SSD must be 42 mm or shorter, and there is no 2.5-inch bay. The plastic shell feels cheap next to a NUC.
- For whom
- An office desktop with Intel 2.5GbE and a heatsinked SSD, for someone who does not mind a busy fan.
- Not for
- Proxmox home servers — the reviewer who bought one does not recommend it for that — quiet rooms and modern games.
Our own summary of 4 published sources, reviewed Sep 23, 2026. We have not tested this Mini PC ourselves; the sources are listed under About this data.
Performance
Same Procyon Office Productivity version, application versions and power profile.
Price history
GMKtec NucBox M3 · Barebone · RAM & SSD not included
Loading checks…
New condition · US stores · USD · Selected configuration only. Prices exclude shipping and tax. Each price stays on the chart until that listing's next check, for at most 36 hours, the same window the store prices use. Out-of-stock, failed and missing checks leave gaps.
About this data6 references
Specs and any benchmark results come from the sources below. We haven't tested this Mini PC ourselves.
Sources
- GMKtec NucBox M3 — manufacturer specifications ↗
- Manufacturer / specification source
- Ports & displays · Reviewed Sep 15, 2026
- Ethernet, Wi-Fi & Bluetooth · Reviewed Sep 15, 2026
- RAM & storage upgrades · Reviewed Sep 15, 2026
- Power supply & power limits · Reviewed Sep 15, 2026
- Dimensions & weight · Reviewed Sep 15, 2026
- Selected configuration ↗
- Selected configuration
- GMKtec NucBox M3 mini PC review: Core i5-12450H is just too power-hungry ↗
- Owner review source · Reviewed Sep 23, 2026
- GMKtec M3 review ↗
- Owner review source · Reviewed Sep 23, 2026
- GMKtec M3 Mini PC Review: Good Home Server for VMware or Proxmox? ↗
- Owner review source · Reviewed Sep 23, 2026
- GMKtec NucBox M3 (Core i5-12450H) review / Mini PC for office work ↗
- Owner review source · Reviewed Sep 23, 2026
Related models
Models with related processors, graphics or use cases. Check each model’s specifications and configurations before comparing.
