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
$359.98*$529.99Save 32%
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Overview
Key Features
AMD RYZEN 5400U MINI PC – BALANCED PERFORMANCE FOR DAILY WORK & ENTERTAINMENT --- GMKtec NucBox M5S mini PC is powered by AMD Ryzen 5400U processor with 4 cores and 8 threads, built on advanced 7nm FinFET technology. With a 2.6GHz base clock and up to 4.0GHz boost frequency, M5S delivers reliable performance for office work, web browsing, home entertainment, online learning, and light creative tasks while maintaining excellent energy efficiency.
16GB DDR4 RAM + 256GB PCIe SSD – EASY UPGRADES WITH FLEXIBLE EXPANSION --- M5S comes with 16GB DDR4 3200MT/s memory and 256GB M.2 PCIe 3.0 SSD for fast startup and responsive daily performance. Featuring dual SO-DIMM memory slots supporting up to 64GB RAM and dual M.2 2280 SSD slots supporting up to 16TB total storage, users can easily upgrade memory and storage for future needs.
AMD RADEON GRAPHICS – LIGHT GAMING & MULTIMEDIA PERFORMANCE --- Integrated with AMD Radeon Graphics featuring 6 graphics cores and up to 1600MHz frequency, M5S delivers smooth visuals for everyday entertainment, HD video playback, and lightweight gaming. Whether watching movies, handling office graphics, or running popular casual games, this compact mini PC provides dependable graphics performance without the size of a traditional desktop.
DUAL 2.5G LAN + WIFI 6E – HIGH-SPEED NETWORKING FOR HOME AND BUSINESS --- Equipped with dual 2.5Gbps Ethernet ports powered by Realtek RTL8125, M5S provides faster and more stable wired connections for NAS, soft routing, home servers, and multi-device networking. Combined with WiFi 6E and Bluetooth 5.2, it delivers reliable wireless connectivity for streaming, video meetings, smart devices, and everyday computing.
TRIPLE DISPLAY OUTPUT – EXPAND YOUR WORKSPACE WITH MULTI-SCREEN SUPPORT --- M5S supports three independent displays through HDMI 2.0, DisplayPort 1.4, and full-function USB-C. The DP interface supports up to 8K@60Hz output, while USB-C supports 4K@60Hz display output, making it ideal for multitasking, office productivity, monitoring systems, and efficient workspace setups.
DUAL-FAN COPPER COOLING SYSTEM – QUIET AND STABLE PERFORMANCE --- M5S adopts a copper cooling system with dual fans and surrounding airflow design to maintain stable performance during daily workloads. With three performance modes including Silent 10W, Balanced 15W, and Performance 25W (peak 35W), users can easily balance noise, power consumption, and performance for different scenarios.
GMKTEC 3-YEAR WARRANTY - Starting from October 2026, GMKtec provides a 3-year warranty service for each mini PC, beginning from the date of purchase. The first year includes free returns and replacements for the complete unit, while the following two years include free replacement of major components. With our professional after-sales support team ready to assist you, you can purchase and use your GMKtec mini PC with confidence.
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
Can the GMKtec M5S handle firewall or router software like pfSense?
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.
How much memory and storage can the M5S be upgraded to?
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.
How many monitors can the GMKtec M5S drive at once?
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.
Is the Ryzen 5400U in the M5S powerful enough for gaming?
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.
What wireless connectivity does the M5S include?
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.
What warranty does GMKtec provide with the M5S?
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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