GMKtec G3 PRO Mini PC Review: Worth Buying?

Not everyone wants to spend a weekend sourcing components, cross-referencing compatibility lists, and then troubleshooting why their new build won't POST at 11pm on a Sunday. That's a real cost, even if it doesn't show up on a receipt. Mini PCs like the GMKtec G3 PRO exist precisely for that gap in the market: people who need a capable desktop that takes up almost no space, arrives ready to go, and doesn't demand anything from them beyond plugging it in. The question is whether the GMKtec G3 PRO mini PC review UK 2026 holds up when you actually put it through its paces, or whether it's just a cheap box dressed up with a decent spec sheet.

I had this unit running on my desk for about a month. It handled daily driver duties, sat next to a monitor in a living room media setup for a week, and got pushed through some productivity workloads to see where it starts to crack. The i3-10110U is a 2019 chip, which immediately raises eyebrows, but the real story here is whether GMKtec has packaged it sensibly, priced it fairly, and built something that actually makes sense for its target audience. Spoiler: it's more nuanced than the Amazon listing suggests.

Current pricing sits at £249.95 with a ★★★★½ (4.5) rating from 264 reviews. That's a decent sample size for a mini PC in this category, and the rating is broadly in line with what I found. Let's get into it.

Connectivity is where this thing punches above its weight class. You get Wi-Fi 6 (802.11ax) via the Wi-Fi Alliance certified standard, Bluetooth 5.2, and a 2.5GbE ethernet port, which is genuinely unusual at this price point. Dual HDMI outputs support 4K, and there's USB 3.2 on the port selection. For a budget mini PC, that's a proper connectivity package. The unit runs Windows 11 Pro out of the box, which is worth noting because some competitors in this space ship with Home or, worse, no OS at all.

Here's the full spec breakdown:

In practice, for the workloads this machine is actually designed for, it performs fine. Web browsing with 15 to 20 Chrome tabs open was smooth. Microsoft Office, including Excel with moderately complex spreadsheets, ran without complaint. Video calls on Teams and Zoom worked well, and the dual-channel RAM configuration genuinely helps here because the integrated GPU can pull more bandwidth for video decode. I ran a sustained Cinebench R23 multi-core loop and it settled around 1,800 to 1,900 points after the first couple of runs, which is where you'd expect a thermally constrained 15W dual-core to land. Single-core scores were around 1,050, which is actually decent for the architecture.

Where it starts to feel its age is anything that benefits from more cores. Video editing in DaVinci Resolve is possible but slow. Compiling code, running virtual machines, or doing anything CPU-intensive for extended periods will expose the two-core limitation pretty quickly. This isn't a workstation. It's not trying to be. But if you're coming from an older Core i5 tower and expecting a step up, manage your expectations. For office work, light media consumption, and general productivity, the i3-10110U in this configuration is genuinely adequate, and the 4.1GHz boost clock means snappy single-threaded response that makes day-to-day use feel more responsive than the spec sheet might suggest.

At 1080p on low settings, older and less demanding titles are playable. Minecraft Java edition runs at 60fps with modest render distances. Older esports titles like CS:GO (now CS2, though the older engine was more forgiving) can hit 30 to 40fps on low at 720p. Stardew Valley, Terraria, and similar 2D indie games run without issue. Anything from the last three or four years that requires a discrete GPU is simply not going to work here. Don't expect to run Cyberpunk 2077, Elden Ring, or anything with modern rendering requirements. The UHD 620 doesn't have the execution units or the memory bandwidth for that.

The 4K dual HDMI output is more relevant for productivity and media than gaming. Driving a 4K display for desktop use, video playback, and document work is absolutely fine. The hardware video decode in the UHD 620 handles H.264 and H.265 content well, so 4K Netflix and YouTube stream smoothly. If you're using this as a media centre or a second display workstation, the 4K output is genuinely useful. Just don't confuse "supports 4K output" with "can game at 4K", because those are very different things, and the G3 PRO can only do one of them.

The 512GB PCIe M.2 SSD is adequate for most users, though GMKtec's spec sheet is vague about the exact drive. During testing, sequential read speeds came in around 1,800 to 2,200 MB/s, which suggests a PCIe 3.0 x4 NVMe drive rather than a Gen 4 part. That's fine for this use case. Boot times were around 12 to 15 seconds from cold, and application launch times felt snappy. The PCIe interface makes a real difference compared to the SATA SSDs you'd find in older budget machines, and day-to-day use benefits noticeably from it.

Upgrade options are limited but not zero. The unit has a single M.2 slot occupied by the included SSD, and there's typically a second M.2 slot available on the G3 PRO's board for storage expansion, though you'll want to verify this when you open the unit as configurations can vary. RAM is soldered on some mini PCs in this class, but the G3 PRO uses SO-DIMM slots, meaning you can upgrade to 32GB if you need it. That's a meaningful advantage over competitors that solder the memory. If 512GB starts feeling tight after a year of use, adding a second M.2 drive is a straightforward option.

Thermal throttling is the real concern with mini PCs, and I tested this properly. Running Cinebench R23 in a loop, the chip hit around 85 to 88 degrees Celsius on the package and maintained its performance through the first three or four runs before settling at a slightly lower clock speed. It didn't throttle catastrophically, but it did back off from peak boost clocks after sustained load. In real-world use, this matters less than benchmark loops suggest. Office work and web browsing don't sustain 100 percent CPU load for minutes at a time, so thermal throttling isn't something most users will ever encounter in practice.

The chassis design helps here. The G3 PRO's vented aluminium shell acts as a passive heatsink supplement, and the unit runs warm to the touch under load but not hot. I'd recommend not blocking the vents by placing it in an enclosed cabinet or stacking things on top of it, which sounds obvious but is worth saying because mini PCs often end up in exactly those situations. Give it a centimetre or two of clearance on all sides and it'll manage its thermals without complaint. One month of daily use and it hasn't given me any thermal shutdown events or unexpected shutdowns, which is the baseline you need to clear.

Opening it up is straightforward. Four screws on the bottom panel and the internals are accessible. The layout is tidy, with the M.2 SSD and SO-DIMM slots clearly accessible. There's no cable management to speak of because there aren't really cables inside a mini PC of this type, but the board layout is sensible and nothing looks like it was crammed in as an afterthought. The thermal paste application on the CPU die looked reasonable when I checked it, which isn't always the case with budget mini PCs from Chinese manufacturers.

There's no RGB, which I personally consider a feature rather than a limitation. The unit is designed to sit on a desk or mount behind a monitor via VESA, and it does both jobs without drawing attention to itself. The VESA mount bracket is included in the box, which is a nice touch. For office deployments or living room setups where you want the computer to be invisible, the understated design is exactly right. The power brick is external, which keeps heat out of the chassis but does mean you've got another block to manage on your desk or behind your monitor.

Wi-Fi 6 support is similarly above average for the price. The 802.11ax standard brings better performance in congested wireless environments and improved efficiency compared to Wi-Fi 5. In a busy office with lots of wireless devices, or a home with multiple people streaming and working simultaneously, Wi-Fi 6 makes a practical difference. Bluetooth 5.2 handles peripherals without issue. I paired a Bluetooth keyboard and mouse and had no connection problems over the testing period.

The USB situation is adequate but not generous. You get two USB 3.2 Gen 1 ports (5Gbps), two USB 2.0 ports, and a USB-C port. For most users that's enough, but if you're running a lot of peripherals you'll want a hub. The dual HDMI outputs are both full-size, which is more convenient than the mini-HDMI or DisplayPort combinations you sometimes see on mini PCs. Both outputs support 4K at 60Hz, so running a dual-monitor 4K setup is genuinely possible. There's no audio jack visible on the spec sheet, so check the product listing carefully if that matters for your setup.

Bloatware is minimal. GMKtec includes a few of their own utilities, but nothing aggressive. There's no trial antivirus software demanding you subscribe, no browser toolbars, and no manufacturer-branded software suite that runs at startup and slows everything down. The out-of-box experience is cleaner than a lot of prebuilt desktops from larger manufacturers. First boot took me through the standard Windows 11 setup process, and within about 20 minutes of unboxing I had a usable desktop with Windows Update running in the background.

Driver support is where I'd urge a bit of caution. The i3-10110U is an older chip, and Intel's driver support for 10th-gen integrated graphics is mature but no longer receiving feature updates. Everything worked correctly out of the box during my testing, including the Wi-Fi 6 adapter and the 2.5GbE NIC. But if you run into driver issues down the line, or encounter issues like Windows Update errors during setup, or problems such as DirectX errors preventing games from launching on Windows 11, GMKtec's support documentation is less comprehensive than you'd get from a major OEM. Their website has driver downloads for their products, but the support experience for a small Chinese manufacturer is going to be different from what you'd get from Dell or HP. That's a trade-off you accept at this price point.

The SO-DIMM slots support up to 32GB of DDR4, so if you buy this with 16GB and find yourself needing more headroom for virtual machines or heavy multitasking, you can upgrade. DDR4 SO-DIMMs are reasonably priced and widely available. Storage expansion via the second M.2 slot (if present on your specific unit) is straightforward. You can add a larger or faster NVMe drive without replacing the existing one, which is useful if you want to keep the system drive and add a bulk storage drive.

The external power brick is a 65W DC adapter with a barrel connector. It's not a standard ATX PSU, so there's no GPU upgrade path even if you wanted one. This is a sealed ecosystem in terms of core performance. What you're buying is the i3-10110U and UHD 620 for the life of the machine. If your needs grow beyond what that can offer, you'll be replacing the unit rather than upgrading it. For the target use case, that's fine. Office machines don't need to be upgraded every year. But go in with clear eyes about the ceiling.

The Beelink EQ12 with an N100 or N150 is a more modern chip on a newer manufacturing process, which means better power efficiency and lower heat output. It's quieter and runs cooler. But the N-series chips are efficiency cores only, with lower single-threaded performance than the i3-10110U's higher boost clock. For tasks that care about single-threaded speed, the G3 PRO has an edge. For sustained multi-threaded workloads, the newer N-series chips can actually keep up better because they don't throttle as aggressively. The Minisforum UM350 with a Ryzen 5 3550H is a more capable machine overall, with four real cores and Vega 8 graphics that meaningfully outperform the UHD 620, but it typically costs more and runs hotter.

The 2.5GbE ethernet and Wi-Fi 6 combination on the G3 PRO is a genuine differentiator. Most competitors at this price point ship with gigabit ethernet and Wi-Fi 5. If networking matters to you, that's a real advantage. The Windows 11 Pro inclusion also adds value that doesn't always show up in direct price comparisons. Factor in the cost of a Pro licence and the G3 PRO's value proposition improves noticeably.

For the target audience, which is home office workers, small business deployments, students, and anyone who needs a capable secondary desktop without spending a lot of money or taking up much space, it delivers. The i3-10110U handles everyday productivity tasks without complaint, the connectivity package is genuinely above average for the price tier, and the compact form factor means it fits anywhere. I've used it for a month and it hasn't given me any problems. That matters.

Where it falls short is if you're expecting it to do more than its spec sheet allows. Two cores in 2026 is a limitation. No discrete GPU means no gaming beyond very light titles. And the older architecture means you're not getting the efficiency improvements of newer chips, so it runs warmer and louder than an N-series equivalent under load. If those trade-offs work for your use case, the G3 PRO is fair value. If you need more cores or better graphics, look at the Minisforum UM350 or save up for something with a more modern processor.

My editorial score for the GMKtec G3 PRO is 7 out of 10. It does what it says, it's priced fairly for what you get, and the connectivity package is a genuine differentiator. But the aging CPU and integrated-only graphics mean it's a tool with a specific job, not a flexible platform. Buy it knowing exactly what it is and you won't be disappointed.