GMKtec G3S Review: A Compact Dual 4K Display Desktop Replacement
The GMKtec G3S mini PC offers a solid, space-efficient computing solution for everyday office tasks and home media, backed by versatile connectivity and a one-year warranty.
By Elvis Dicki
Updated October 21, 2026
In the ever-shrinking world of desktop computing, the mini PC has carved out a significant niche, promising full functionality without the bulk. The GMKtec G3S enters this competitive space as a compact desktop computer designed to handle routine digital tasks. Built around Intel’s 12th-generation Alder Lake N95 processor and equipped with 8GB of RAM and a 256GB SSD, this unit aims to be a reliable, space-saving replacement for a traditional tower.
This review analyzes the GMKtec G3S from a specification and design perspective to determine its ideal user. It is positioned for those seeking a basic, efficient computer for office work, web browsing, and media consumption, with the added benefit of supporting dual high-resolution displays. For users needing a simple, unobtrusive machine for daily productivity and entertainment, the G3S presents a compelling option.
GMKtec Nucbox G3S Mini PC Intel N95 8GB RAM 256GB
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GMKtec G3S at a Glance
| Processor | Intel Alder Lake N95 (4 cores, 4 threads), up to 3.4GHz |
|---|---|
| Memory | 8GB DDR4 RAM |
| Storage | 256GB M.2 2242 SSD (expandable via additional slots) |
| Graphics | Integrated Intel UHD Graphics (up to 1200MHz) |
| Video Output | Dual HDMI 2.0 ports (4K @ 60Hz) |
| Connectivity | WiFi 5, Bluetooth 5.0, Gigabit Ethernet (RJ45) |
| USB Ports | 3 x USB 3.2, 1 x USB 2.0 |
| Power | 12V/3A adapter, ~15W typical consumption |
| Operating Environment | -10°C to 45°C |
| Warranty | 1-year limited warranty from GMKtec |
Design and Build
The defining characteristic of the GMKtec G3S is its compact form factor. As a mini PC, it is designed to occupy minimal desk space, making it suitable for cluttered workstations, media centers tucked behind monitors, or even mounted out of sight using the included VESA mount. The unit’s small footprint is a primary advantage over traditional desktops, offering the core computing experience without the associated bulk.
The build appears focused on functionality. Cooling is handled by an internal fan, a common solution in mini PCs of this class to manage thermals within the confined space. While effective, this method can sometimes lead to audible fan noise under sustained processing loads, a trade-off for the compact size. The chassis houses a practical array of ports on its sides, providing easy access for all necessary connections.
Performance and Features
Processing Power and Memory
At the heart of the G3S is the Intel Alder Lake N95 processor. This 12th-gen chip features four cores and four threads with a maximum turbo frequency of 3.4GHz. According to the manufacturer, it offers a performance improvement over previous generations like the N100 or N5105. This level of processing is tailored for everyday computing: smoothly running office suites, handling multiple browser tabs, managing email, and streaming media. The pre-installed 8GB of DDR4 RAM supports this multitasking, while the 256GB M.2 SSD ensures quick boot times and responsive file access. It’s important to note that the RAM is fixed at 8GB, which may be a limiting factor for users who run many applications simultaneously or plan to keep the system for several years.
Graphics and Display Support
The integrated Intel UHD Graphics, with a frequency up to 1200MHz, handles the visual workload. A standout feature is the dual HDMI 2.0 outputs, each capable of driving a 4K display at 60Hz. This makes the G3S an excellent choice for productivity setups, allowing users to extend their workspace across two high-resolution monitors. The graphics support 4K video playback and AV1 decoding, making it competent for home theater use when connected to a TV or projector. However, the lack of a dedicated graphics card means it is not suited for gaming beyond very basic titles or for demanding video editing tasks.
Connectivity and Expansion
Connectivity is a strong point for the G3S. The port selection is versatile for a device of its size: three high-speed USB 3.2 ports and one USB 2.0 port accommodate peripherals like keyboards, mice, and external storage. The dual HDMI ports have been mentioned as a key asset. For networking, users can choose between wired Gigabit Ethernet via the RJ45 port or wireless connectivity through the built-in WiFi 5 and Bluetooth 5.0 modules. Bluetooth is convenient for connecting wireless accessories like headphones, keyboards, or speakers without dongles.
Storage expansion is possible beyond the included 256GB SSD. The system has dual SSD slots: one supports an M.2 2280 PCIe drive (up to 8TB), and the other supports an M.2 2242 SATA drive (up to 2TB). This provides significant flexibility for adding more storage in the future, which is a valuable feature for media libraries or file archives.
Additional Features
The G3S includes several features useful for specific deployment scenarios. It supports Wake on LAN (WoL), PXE Boot, RTC Wake, and Auto Power On. These features make the mini PC suitable for light server duties, digital signage, or remote management in a small office or home lab environment where it may need to start up or be accessed without physical interaction.
Setup, Support and Ownership
Setup should be straightforward for most users. The package includes the mini PC, a power adapter, an HDMI cable, a VESA mount with screws, and a user manual. The process involves connecting the power, monitor(s), and peripherals. The device does not come with a pre-installed operating system, so users will need to install their preferred OS, such as Windows or a Linux distribution.
GMKtec backs the GMKtec G3S with a one-year limited warranty that covers defects in design and workmanship from the date of purchase. The manufacturer mentions a professional after-sales team for support. For users interested in similar compact computing solutions, exploring other options like those discussed in our guide to Intel N100-based mini PCs can provide useful context.
What Owners Say
Overall owner feedback for the GMKtec G3S is positive. The aggregate rating reflects general satisfaction with the product’s performance for its intended use. The majority of reviews are favorable, with a significant portion of users awarding the highest rating. Positive comments often highlight the device’s compact size, quiet operation during light tasks, and its capability as a basic desktop or media center. Critical feedback from a smaller segment of users sometimes points to limitations under heavier loads or preferences for different connectivity options. The rating distribution indicates it reliably meets expectations for routine computing needs.
Pros and Cons
Pros
- Extremely compact design saves considerable desk space.
- Dual HDMI 2.0 ports enable productive dual 4K monitor setups.
- Adequate connectivity with multiple USB 3.2 ports and Gigabit Ethernet.
- Includes flexible storage expansion options for future upgrades.
- Useful features like Wake on LAN for server-like applications.
- Backed by a one-year manufacturer warranty.
Cons
- Fixed 8GB RAM may limit heavy multitasking or future-proofing.
- No dedicated graphics card restricts gaming and professional video work.
- Cooling fan can become noticeable under sustained processor load.
- Wireless connectivity is WiFi 5, not the newer WiFi 6 standard.
- Requires user to install an operating system.
- Integrated graphics share system memory, reducing available RAM.
Who Should Buy It (and Who Should Skip It)
The GMKtec G3S is an excellent fit for users who prioritize space efficiency and need a computer for standard daily tasks. It’s ideal for home office workers, students, or general home users who primarily browse the web, use office applications, stream video, and would benefit from a dual-monitor setup. It’s also a good candidate for light-duty server roles in a home lab, digital signage, or as a dedicated media player connected to a TV. For more specialized media center builds, our review of fanless mini PCs explores alternatives focused on silent operation.
This mini PC should be skipped by power users, gamers, and creative professionals. Its processor and integrated graphics are not designed for demanding workloads like video editing, 3D rendering, or modern gaming. Users who require extensive multitasking with many memory-hungry applications or who want the latest wireless standard (WiFi 6) should look at more powerful or modern alternatives. Those seeking a mini PC for gaming should consider dedicated models, as discussed in our overview of the best mini PCs for gaming.
Final Verdict
The GMKtec G3S succeeds as a focused, compact desktop replacement. It delivers reliable performance for its target audience, excelling in areas that matter for everyday use: efficient multitasking, fast storage, and versatile display connectivity. The ability to drive two 4K monitors is a particularly compelling feature for productivity, and the option for storage expansion adds longevity. While it makes understandable compromises in areas like maximum RAM and graphics power to hit its form factor and positioning, these are acceptable for its core use cases.
For anyone seeking to declutter their workspace with a capable, no-fuss computer for office work, web browsing, and media, the G3S is a strong contender. It offers a balanced specification sheet in a tiny package, supported by a warranty. It represents a sensible choice in the crowded mini PC market for users whose needs align with its capabilities. As the mini PC segment evolves with new processors and features, staying informed through resources like our Mini PCs category page can help with future purchasing decisions.
FAQs
Does the GMKtec G3S come with Windows installed?
No, the GMKtec G3S does not come with a pre-installed operating system. The product data lists the operating system simply as “OS,” indicating it is left for the user to install. You will need to install your preferred operating system, such as Windows 10/11 or a Linux distribution, using a USB drive after purchase.
Can the RAM be upgraded from 8GB?
Based on the provided specifications, the 8GB of DDR4 RAM appears to be fixed and not user-upgradeable. The manufacturer’s description and specs list it as “prebuilt” memory, and no information is given about accessible RAM slots. If future-proofing or more memory is a critical need, this limitation should be considered before purchase.
Is this mini PC suitable for light gaming?
The GMKtec G3S is not designed for gaming. It uses integrated Intel UHD Graphics without dedicated video memory. While it can handle 4K video playback and basic graphical tasks, it lacks the power for modern 3D games. It might run very old or extremely lightweight indie titles, but for any meaningful gaming, a system with a dedicated GPU is required.
What is included in the box with the G3S?
The package includes the GMKtec Nucbox G3S mini PC unit itself, a power adapter (12V/3A), a VESA mount with the necessary screws for attaching the PC to the back of a monitor or stand, one HDMI cable for display connection, and a user manual. You will need to provide your own keyboard, mouse, and monitor(s).
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.