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GMKtec

GMKtec Nucbox M5 S Ryzen 5300U Compact Gaming Mini PC

A palm-sized Ryzen desktop with dual 2.5GbE ports, making it equally credible as an office PC or a Pfsense firewall box

$599.99*
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*Price sourced from Amazon.com. Last updated:Jul 23, 2026.Price and availability are subject to change.

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Overview

The Nucbox M5 S is aimed squarely at buyers who want a single small box to cover office work, light gaming, and home networking duties. The AMD Ryzen 5300U inside is a ZEN 3+ part with 4 cores and 8 threads, and GMKtec exposes its behavior directly in the BIOS: a 2.00GHz base clock in power-saving quiet mode, or Turbo Boost up to 4.50GHz in performance mode. Graphics come from an 8-core AMD Radeon GPU clocked at 2000MHz, rated by GMKtec for design software, 4K@60Hz video editing, and playback across up to three simultaneous displays. The dual 2.5GbE NIC configuration is the standout, and GMKtec calls it out specifically for Untangle, Pfsense, or small office server roles.

Ownership details are straightforward. The machine ships with 16GB of DDR4 installed as a dual-channel 2x8GB pair, expandable to 64GB, and its M.2 2280 PCIe 3.0 storage supports dual-slot expansion to 8TB, though GMKtec notes upgrades are not included. The port cluster covers two USB 3.2, two USB 2.0, HDMI 2.0, DisplayPort, a USB-C port handling PD, DP and data, a 3.5mm combo audio jack, and a DC power input. Wireless is WiFi 6E with tri-band support plus Bluetooth 5.2. Buyers should note the listing's internal contradictions around processor model and SSD capacity, and confirm the exact configuration with the seller before ordering.

Key Features

Office Gaming Mini PC - UPGRADED GMKtec Nucbox M5 Ultra Series is equipped with the powerful AMD Ryzen 5300U processor, 4 Cores/8 Threads, Base 2.00GHz (Power Saving Quiet Mode) with Turbo Boost up to 4.50GHz (Performance Mode) in BIOS settings, Based on the ZEN 3+ architecture, this small but powerful mini pc delivers satisfying results in productivity, office work, and gaming.

16GB DDR4 RAM & 512GB PCIe SSD - Installed with DDR4 16GB RAM Dual Channel (2x8GB), the Nucbox M5 S mini pc support expansion to 64GB RAM. Featured with 1TB M.2 2280 PCIe 3.0 SSD, support dual slot expansion to 8TB SSD. (Upgrades not included)

DUAL NIC LAN 2.5G RJ45 - Fast Network Speeds: Enjoy up to 2500Mbps data transmission speed without worrying about lagging. Ideal for working, gaming, and surfing the internet. Great for Untangle, Pfsense or as a server office PC.

Mini Desktop Computer with 4K Triple Screen Display - Nucbox M5 S integrates AMD Radeon Graphics 8 Cores 2000 MHz GPU to deliver powerful graphics processing power to easily handle the demands of complex design software, 4K@60Hz UHD video editing, and playback. It can connect to 3 display screens simultaneously.

Fast Internet WiFi 6E + BT5.2 Connection - GMKtec Mini PC with WiFi-6E Wireless, have 2.5G/5G/6G triple band, more faster and lower latency. Bluetooth 5.2 allowing you more quickly to connect other wireless devices (headset, mouse, keyboard, etc.) Interface features 2*USB3.2 ports, 2*USB2.0 ports, 1*HDMI 2.0 port(4K@60Hz), 1*USB-C port(PD/DP/DATA), 1*DP Port, 1*Audio 3.5mm (HP&MIC), 1*DC Power Port.

GMKtec Warranty - GMKtec offers a 1-year limited warranty for each mini PC, starting from the date of the purchase. All defects due to design and workmanship are covered. With a professional after sales team always ready to attend to your needs, you can simply relax and enjoy your mini PC.

Specifications

Brand
GMKtec
Model
Nucbox M5 S
Processor
AMD Ryzen 5300U, ZEN 3+, 4 cores / 8 threads
Clock Speed
2.00GHz base (quiet mode), up to 4.50GHz Turbo Boost (performance mode)
Graphics
AMD Radeon, 8 cores, 2000MHz
Memory
16GB DDR4 dual channel (2x8GB), expandable to 64GB
Storage
M.2 2280 PCIe 3.0 SSD, dual slot, expandable to 8TB
Networking
Dual 2.5GbE RJ45 (up to 2500Mbps)
Wireless
WiFi 6E tri-band (2.4G/5G/6G), Bluetooth 5.2
Video Outputs
HDMI 2.0 (4K@60Hz), DisplayPort, USB-C (DP), triple display support
USB Ports
2x USB 3.2, 2x USB 2.0, 1x USB-C (PD/DP/Data)
Other Ports
3.5mm audio (headphone and mic), DC power input
Warranty
1-year limited warranty

Frequently Asked Questions

The feature text specifies the AMD Ryzen 5300U with 4 cores and 8 threads, while the product title references a 5400U. Confirm the exact chip with the seller before ordering.
It ships with 16GB of DDR4 installed as a dual-channel 2x8GB kit. Storage is listed inconsistently at 512GB in the title and 1TB in the feature description, so verify before purchase.
Yes. GMKtec specifically positions the dual 2.5GbE RJ45 NIC configuration for Untangle, Pfsense, or small office server use, with up to 2500Mbps of transmission speed.
Three. The 8-core Radeon GPU supports simultaneous connection to three displays via the HDMI 2.0 port, the DisplayPort output, and the USB-C port's DP capability.
Memory expands to 64GB and storage to 8TB across two M.2 2280 PCIe 3.0 slots. GMKtec notes these upgrade components are not included with the machine.
The BIOS includes a power-saving quiet mode that holds the processor at its 2.00GHz base clock, with a separate performance mode that unlocks the 4.50GHz Turbo Boost ceiling.
A one-year limited warranty starting from the purchase date, covering defects in design and workmanship, backed by GMKtec's after-sales support team.

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