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GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC — main product image
GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC
GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC
GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC
GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC
GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC
GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC
GMKtec

GMKtec M5S AMD Ryzen 5400U Compact Mini Desktop PC

A pocket-sized Ryzen 5400U desktop with dual 2.5G LAN and 8K triple-display output that punches above its 10W power draw

$359.99*$529.99Save 32%
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*Price sourced from Amazon.com. Last updated:Aug 18, 2026.Price and availability are subject to change — details.

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Overview

The GMKtec M5S is a mini desktop that leans on efficiency rather than brute force. At its core sits the AMD Ryzen 5400U, a 10W chip with four cores, eight threads, and a 4.0GHz boost. GMKtec compares its multi-core output to the Ryzen 7330U and claims a lead over the Intel N150 and older AMD parts. That framing tells you who it's for: people who want a quiet, low-draw machine for office productivity, home entertainment, media servers, and general multitasking. It is not pitched as a gaming rig, and the modest core count sets realistic expectations.

Where the M5S gets interesting is its networking and display flexibility. Two 2.5G RJ45 ports and WiFi 6E with triple-band 2.5/5/6GHz make it a candidate for firewall or router builds on pfSense or Untangle, and Bluetooth 5.2 handles peripherals. Six-core Radeon graphics at 1600MHz can feed three screens and push 8K at 60Hz. On the ownership side, the 16GB DDR4 and 256GB PCIe 3.0 SSD are both expandable, with memory reaching 64GB across two slots and storage scaling to 16TB via dual slots, though those upgrades cost extra. A 1-year limited warranty rounds out the package.

Key Features

Powered by AMD Ryzen 5400U, this ultra-efficient 10W processor delivers performance comparable to Ryzen 7330U while consuming less power. With 4 cores, 8 threads, and up to 4.0GHz, it delivers up to 50% higher multi-core performance than Intel N150 and significantly outperforms AMD R2544 and 3200U. Perfect for office productivity, home entertainment, media servers, streaming, and multitasking.

16GB DDR4 RAM & 256GB PCIe SSD - Installed with DDR4 16GB RAM, the Nucbox M5S mini pc support expansion to 64GB RAM(32*2). Featured with 256GB M.2 2280 PCIe 3.0 SSD, support dual slot expansion to 16TB 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.

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.)

Mini Desktop Computers with 8K Triple Screen Display - Nucbox M5S Ultra integrates AMD Radeon Graphics 6 Cores 1600 MHz GPU to deliver powerful graphics processing power to easily handle the demands of complex design software, 8K@60Hz UHD video editing, and playback. It can connect to 3 display screens simultaneously.

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 M5S
Processor
AMD Ryzen 5400U
Cores / Threads
4 cores, 8 threads
Max Clock Speed
4.0GHz
TDP
10W
Graphics
AMD Radeon Graphics, 6 cores, 1600MHz
Memory
16GB DDR4, expandable to 64GB (32GB x2)
Storage
256GB M.2 2280 PCIe 3.0 SSD, dual slot up to 16TB
Wired Networking
Dual 2.5G RJ45 LAN
Wireless
WiFi 6E (2.5/5/6GHz), Bluetooth 5.2
Display Output
8K 60Hz, triple screen support
Warranty
1-year limited

Frequently Asked Questions

Yes. Its dual 2.5G RJ45 ports are explicitly suited to pfSense, Untangle, or use as a server office PC, giving you two fast wired network interfaces to work with.
The 16GB DDR4 memory expands to 64GB across two 32GB slots, and the 256GB PCIe 3.0 SSD sits in a dual-slot layout that scales to 16TB. Both upgrades are sold separately.
Up to three simultaneously. Its integrated AMD Radeon graphics support a triple-screen setup and can output 8K resolution at 60Hz for video playback and editing.
It targets productivity, not gaming. With four cores and eight threads in a 10W envelope, it suits office work, streaming, and media serving, but it lacks headroom for demanding titles.
It features WiFi 6E with triple-band 2.5/5/6GHz for lower latency, plus Bluetooth 5.2 for quickly pairing headsets, mice, keyboards, and other wireless peripherals.
GMKtec offers a 1-year limited warranty from the purchase date, covering defects in design and workmanship, backed by an after-sales support team.

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