GMKtec G3S Review: A Compact Mini PC with Dual SSD Slots
The GMKtec G3S is a compact desktop powered by an Intel N95 processor, designed for users who need a space-saving computer for everyday tasks, multimedia, and dual 4K displays, though it's not suited for demanding workloads.
By Elvis Dicki
Updated October 20, 2026
The GMKtec G3S is a mini desktop PC designed to replace a traditional tower with a much smaller footprint. It targets users who need a capable computer for everyday productivity, home entertainment, and business applications where space is at a premium, such as in home offices, classrooms, or as a Home Theater PC (HTPC). If you need a simple, affordable, and compact computer for general use, the GMKtec G3S offers a compelling package of performance and connectivity.
At its core is an Intel Alder Lake N95 processor paired with 8GB of RAM and a 256GB M.2 SSD, specifications aimed squarely at light to moderate computing tasks. Its design focuses on flexibility, supporting dual 4K displays and offering surprising storage expansion options for a device of its size. This review will break down the G3S’s design, performance features, and real-world suitability based on its specifications.
GMKtec G3S Mini PC Intel N95 8GB RAM 256GB SSD
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GMKtec G3S at a Glance
| Specification | Detail |
|---|---|
| Processor | Intel Alder Lake N95 (4 cores, 4 threads, up to 3.4GHz) |
| Memory | 8GB DDR4 (3200 MT/s) |
| Storage | 256GB M.2 2242 SSD (PCIe) |
| Graphics | Intel UHD Graphics |
| Video Output | Dual HDMI 2.0 (4K@60Hz) |
| Connectivity | WiFi 5, Bluetooth 5.0, Gigabit Ethernet |
| Ports | 3x USB 3.2, 1x USB 2.0, 3.5mm Audio, DC Power |
| Storage Expansion | Dual M.2 slots (2280 PCIe & 2242 SATA) |
| Operating System | Windows 11 Pro |
| Warranty | 1-year limited warranty |
Design and Build
The GMKtec G3S is built around a compact, black chassis typical of modern mini PCs, emphasizing its role as a space-saving solution. Its small form factor is a primary design advantage, allowing it to be placed discreetly on a desk, mounted behind a monitor using the included VESA mount, or tucked away in a media center. The package includes the necessary hardware for wall mounting, enhancing its flexibility for various setups from office workstations to living room entertainment centers. The manufacturer lists operating temperatures between -10°C and 45°C, indicating its design is suited for standard indoor environments. While specific materials are not detailed by the manufacturer, the overall build is focused on functionality and integration into a multi-device ecosystem.
Performance and Features
Processor and Memory
Driving the GMKtec G3S is the 12th Gen Intel Alder Lake N95 processor. This chip features 4 cores and 4 threads with a maximum turbo frequency of 3.4GHz and 6MB of cache. According to the manufacturer, this processor provides up to a 36% overall performance improvement compared to older Intel models like the N100, N5105, N5100, and N5095. This positions the G3S for routine computing tasks such as web browsing, office applications, and media streaming. The system comes with 8GB of DDR4 memory installed, which supports smooth multitasking for light to moderate workloads. However, the data indicates the RAM is not expandable beyond the pre-installed 8GB, which may limit performance for users running many applications simultaneously or more demanding software.
Storage and Expansion
One of the standout features of the G3S is its storage configuration and expansion potential. It comes with a 256GB M.2 2242 SSD, which provides fast boot times and quick file access. More importantly, the mini PC is equipped with two M.2 slots for storage expansion: one supports an M.2 2280 PCIe SSD, and the other supports an M.2 2242 SATA SSD. The manufacturer states a maximum total expansion potential of 9TB, combining a large PCIe drive and a smaller SATA drive. This makes the G3S exceptionally versatile for users who need ample local storage for media libraries, documents, or applications, far exceeding the capacity of many competitors in this form factor.
Connectivity and Ports
The G3S is well-equipped for connectivity, a crucial aspect for a compact desktop. It includes three USB 3.2 ports and one USB 2.0 port for connecting peripherals like keyboards, mice, printers, and external storage. For display, it offers two HDMI 2.0 ports, each capable of outputting 4K resolution at 60Hz. This dual 4K support enables efficient multi-monitor setups for office work or enhanced entertainment viewing. Network connectivity is covered by Gigabit Ethernet (RJ45), WiFi 5, and Bluetooth 5.0, providing flexible options for wired or wireless connections to the internet and other devices. A 3.5mm audio jack is included for headphones or speakers.
Graphics and Multimedia
The integrated Intel UHD Graphics handles the visual workload. The manufacturer highlights support for 4K video playback and AV1 decoding, which contributes to a smooth streaming experience for modern video codecs. This, combined with the dual HDMI outputs, makes the G3S suitable as a Home Theater PC (HTPC) for 4K content. However, the integrated graphics are not designed for gaming or GPU-intensive tasks like video editing or 3D rendering; they are intended for desktop composition, video playback, and basic graphical applications.
Setup, Support and Ownership
GMKtec includes a VESA mount and screws in the box, facilitating easy attachment to the back of a monitor or other suitable surface. The included HDMI cable and power adapter mean the user has the essentials to get started out of the box. The system comes with Windows 11 Pro pre-installed. For support, GMKtec provides a 1-year limited warranty covering defects in design and workmanship from the date of purchase. The manufacturer mentions a professional after-sales team, but specific details regarding software update policies or the availability of driver downloads are not provided in the available data. The power adapter is rated for 12V/3A input, with a listed power consumption of 6 watts, suggesting energy-efficient operation.
What Owners Say
The product has garnered positive feedback from owners, reflected in its high rating. Owners generally appreciate its compact size, quiet operation, and performance for everyday tasks like web browsing, office work, and media consumption. The dual 4K display support is frequently cited as a major benefit for productivity. Some users have successfully deployed it for specific uses like Proxmox virtualization, a home server, or an HTPC. Criticisms, while less common, sometimes relate to the limitations of the 8GB RAM for more intensive multitasking. Overall, the consensus is that it delivers strong value for its intended use cases.
Pros and Cons
Pros
- Extremely compact and VESA-mountable design saves desk space.
- Dual 4K HDMI outputs enable productive multi-monitor setups.
- Excellent storage expansion via dual M.2 slots.
- Good selection of ports including USB 3.2 and Gigabit Ethernet.
- Intel N95 processor offers improved performance over older N-series chips.
- Includes Windows 11 Pro and all necessary cables.
Cons
- 8GB of non-expandable RAM limits heavy multitasking and future-proofing.
- Integrated Intel UHD Graphics are unsuitable for gaming or creative work.
- Processor is best suited for light to moderate workloads only.
- Lacks the latest WiFi 6 connectivity.
- No optical audio output for high-end home theater setups.
- Cooling method is standard air cooling, not fanless.
Who Should Buy It (and Who Should Skip It)
The GMKtec G3S is an ideal choice for users seeking a minimalistic, affordable desktop for everyday computing. It’s perfect for office workers, students, or home users who need a reliable machine for web browsing, document editing, email, and streaming video. Its dual 4K output makes it great for productivity with multiple monitors. It also serves well as a dedicated HTPC for 4K media playback or a compact server for light-duty tasks. For those interested in similar compact solutions, our guides on Intel N100 mini PCs and fanless mini PCs offer comparisons.
Users should look elsewhere if their needs include gaming, video editing, 3D modeling, or other GPU-intensive tasks. The 8GB RAM ceiling also makes it a poor fit for professionals who routinely run virtual machines, complex development environments, or need to keep dozens of browser tabs and applications open simultaneously. Those requiring the absolute latest in wireless connectivity like WiFi 6 may also want to consider other options, such as those explored in our AI mini PC overview.
Final Verdict
The GMKtec G3S successfully delivers on the core promise of a mini PC: providing capable desktop computing in a dramatically smaller package. Its Intel N95 processor offers a meaningful performance bump for its target tasks, and the inclusion of dual M.2 slots for storage expansion is a significant advantage rarely found at this price point. The generous port selection and dual 4K display support further enhance its versatility for both work and entertainment setups.
Its limitations are clear and aligned with its market position: the 8GB RAM and integrated graphics define its ceiling. It is not a powerhouse for creatives or hardcore multitaskers. However, for its intended audience—users who prioritize space savings, value, and efficiency for everyday computing—the G3S represents a well-rounded and compelling choice. It stands as a strong option in the crowded mini PC field, particularly for those who value storage flexibility. For a broader look at this category, visit our Mini PCs hub.
FAQs
Can the GMKtec G3S handle gaming?
No, the GMKtec G3S is not suitable for gaming. It uses integrated Intel UHD Graphics, which are designed for basic desktop display, video playback, and casual web games. It lacks the dedicated graphics processing power required to run modern PC games at acceptable frame rates or graphical settings.
Can I upgrade the RAM on the G3S?
Based on the manufacturer’s specifications, the RAM is listed with a maximum size of 8GB and is pre-installed. The data does not indicate user-accessible or upgradeable RAM slots, suggesting the memory is soldered onto the board and not expandable beyond the included 8GB.
Is this mini PC good for a home media server?
Yes, the G3S can be a good fit for a light-duty home media server. Its low power consumption, compact size, and significant storage expansion potential (up to 9TB via dual M.2 slots) make it suitable for storing and serving media files over a home network. Its Gigabit Ethernet port ensures fast file transfers. However, its processing power is best for serving files rather than intensive real-time transcoding for multiple streams.
What operating system does it come with?
The GMKtec G3S comes with Windows 11 Pro pre-installed, as listed in the product specifications. This is a full version of the operating system, not a trial or stripped-down edition, providing immediate usability out of the box for most users.
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.