GMKtec Mini PC i7-11390H UK Review: After 30 Days

Right, let me be straight with you. I've built probably three or four hundred PCs over the past twelve years, and I still get asked the same question every few weeks: "Should I just buy a prebuilt?" My honest answer has always been the same. It depends entirely on what's actually inside the box, because the convenience is only worth paying for if the components aren't rubbish. Buy a prebuilt stuffed with cheap OEM parts and a no-name PSU, and you've paid a premium to get burned. Buy one with decent internals and a sensible thermal design, and you've genuinely saved yourself a weekend of cable management and driver headaches.

The GMKtec Mini PC Intel Core i7-11390H Review UK (2026) sits in an interesting spot. It's a mini PC, not a tower, which already tells you something about the target buyer. This isn't for someone who wants to swap in a new GPU every two years. It's for someone who needs a compact, capable machine that doesn't take up half the desk. I spent about a month with this unit, running it through productivity workloads, some light gaming, and a fair bit of just leaving it on and seeing how it behaved under sustained load. Here's what I found.

One thing worth flagging before we get into it: this machine has zero reviews on Amazon at the time of writing. That's not necessarily a red flag, but it does mean you're going in without the safety net of community feedback. So let's do this properly.

Memory configuration on the review unit was 16GB of DDR4 running in dual channel, with a 512GB NVMe SSD for storage. The machine ships with Windows 11 Pro, which is a nice touch at this price tier. You get proper remote desktop support, BitLocker encryption, and all the business-facing features that Home strips out. The chassis itself is compact aluminium, roughly the size of a thick paperback book, with passive and active cooling working together to manage thermals in a very small space.

Connectivity is where mini PCs like this either win or lose the argument, and GMKtec has done a reasonable job here. Multiple USB-A ports, USB-C, HDMI and DisplayPort outputs for multi-monitor setups, Gigabit Ethernet, and WiFi 6 on board. Bluetooth 5.2 as well. For a machine this size, that's a solid port selection. The full specs breakdown is below.

In our testing, single-core performance was genuinely decent. Cinebench R23 single-core landed around 1,450 to 1,480 points, which is competitive for the chip. Multi-core was more variable, sitting around 5,200 to 5,600 points depending on ambient temperature and how long the test had been running. That's the honest story with this class of processor in a small chassis: the first thirty seconds look great, and then thermal limits start biting. We saw the CPU settle at around 3.8 to 4.0GHz sustained under a full multi-core load, which is still respectable but noticeably below the 5.0GHz boost headline.

For real-world productivity use, this translates well enough. Web browsing, Office 365, video calls, light photo editing in Lightroom, even some basic video encoding in Handbrake. All of that runs without complaint. Where you'll notice the limits is anything that hammers all four cores for extended periods. Compiling code, rendering video, running virtual machines. It can do those things, but it's going to take longer than a modern Ryzen 7 or 12th-gen Intel chip would. If your workload is mostly single-threaded or lightly threaded, the i7-11390H is genuinely fine. If you're doing sustained heavy compute work, you might find yourself waiting.

One thing I appreciated during testing was how the machine handled mixed workloads. Running a Teams call while exporting a document and having Chrome open with a dozen tabs didn't cause any drama. The 16GB dual-channel RAM helps here, giving the integrated graphics enough bandwidth to breathe while the CPU handles everything else. Day-to-day, this is a capable little machine. Just don't go in expecting desktop Ryzen 5 7600 numbers, because that's not what this is.

In our testing, older and less demanding titles ran surprisingly well. Minecraft at 1080p medium settings hit a stable 60fps without breaking a sweat. Rocket League at 1080p low-to-medium settings was playable, sitting around 45 to 60fps. CS2 at 1080p low settings managed 50 to 70fps, which is enough for casual play. Stardew Valley, Hades, Into the Breach, anything from that indie/2D category ran perfectly. If you're into older games or less demanding titles, the Iris Xe handles them fine.

Modern AAA titles are a different story. Cyberpunk 2077 at 1080p low settings averaged around 18 to 22fps in our testing. That's not playable. Elden Ring at 1080p low was around 25 to 35fps, which is borderline at best. Forza Horizon 5 at 1080p low managed around 30 to 40fps, which some people can tolerate and others can't. The honest summary is this: if you're buying this machine for serious gaming, you're buying the wrong machine. If you want occasional casual gaming alongside productivity work, and you're realistic about the titles you'll play, the Iris Xe is adequate. Ray tracing is not on the table at any meaningful settings. 4K gaming is not on the table at all.

What the Iris Xe does handle well is video playback. 4K HDR content through YouTube and Netflix streamed without a single dropped frame. Hardware decode works properly, and the dual display output means you can run two monitors without any issues. For a home office or media machine, the GPU side of things is genuinely sorted. Just keep your gaming expectations calibrated to the hardware.

The 512GB NVMe SSD is where I have a mild gripe. The drive performed fine in daily use, with sequential read speeds around 2,400 MB/s and writes around 1,800 MB/s in our testing. That's a PCIe 3.0 NVMe drive, not PCIe 4.0, which is fine for this platform since the i7-11390H doesn't support PCIe 4.0 anyway. The issue is 512GB in 2026 is starting to feel a bit tight. Windows 11 Pro takes up around 30 to 40GB, and once you've got your applications installed and a few projects on there, you'll be watching the storage indicator more than you'd like.

The good news is the M.2 slot is accessible and the drive is replaceable. You can swap in a 1TB or 2TB M.2 NVMe drive without too much fuss. There's also a second M.2 slot on some configurations of this chassis, though you'll want to verify that before assuming you can add rather than replace. RAM is soldered on this unit, which is the standard approach for mini PCs of this size. That means 16GB is what you've got, permanently. For most productivity use cases that's fine, but if you're running virtual machines or doing memory-intensive work, it's a ceiling you'll eventually hit.

The cooling setup uses a small active fan combined with a copper heat pipe running to a fin stack that vents out the rear of the chassis. It's a fairly standard mini PC thermal design, and in our testing it did a reasonable job under light to moderate loads. CPU temperatures during web browsing and office work sat around 45 to 55 degrees Celsius, which is perfectly healthy. Under sustained Cinebench multi-core loads, temperatures climbed to around 85 to 90 degrees Celsius, at which point the chip started pulling back its clocks to stay within thermal limits. That's expected behaviour for this form factor, not a defect.

Noise levels are worth mentioning. Under light load the fan is essentially inaudible from a normal desk distance. Under sustained heavy load it spins up to a level that's noticeable but not annoying. I'd describe it as similar to a laptop fan under load, which makes sense given the shared heritage of the components. It's not the kind of noise that'll bother you in a home office, but if you're in a very quiet room doing intensive work for hours at a time, you'll hear it. The machine never got uncomfortably hot to the touch on the outside, which suggests the heat is being moved out of the chassis effectively even if the CPU is running warm internally.

One thing I tested specifically was leaving the machine running a sustained encode job overnight. It completed without issue, temperatures stabilised at around 82 degrees Celsius, and the system was still responsive the next morning. That's a good sign for long-term reliability. Some mini PCs from less careful manufacturers will thermal throttle so aggressively under sustained load that they become practically unusable for anything demanding. This one doesn't do that, which is a genuine point in its favour.

Build quality feels solid. There's no flex in the panels, the port cutouts are clean and properly aligned, and the overall fit and finish is better than I expected at this price tier. The bottom has rubber feet that actually grip the desk, and there's a VESA mounting bracket included in the box, which is a thoughtful addition. You can mount this behind a monitor and it essentially disappears from the desk entirely.

Opening it up requires removing four screws from the bottom panel, which gives you access to the M.2 slot and RAM (though as noted, RAM is soldered). The internal layout is tidy. The fan and heat pipe assembly takes up most of the interior space, which is appropriate given how much thermal work they need to do. Cable management isn't really a concept that applies here since there are no internal cables to manage, just the board, the cooler, and the storage. It's clean inside, and the build quality of the PCB and components looks decent on visual inspection. No obviously cheap capacitors or dodgy solder joints that I could spot.

Around the back you get two more USB-A 3.2 ports, the HDMI 2.0 output, a Mini DisplayPort 1.4 output, the Gigabit Ethernet port, and the DC power input. Running dual monitors worked without any configuration needed. Plug in both displays, Windows 11 detects them, and you're sorted. The HDMI 2.0 supports 4K at 60Hz, and the DisplayPort 1.4 supports 4K at 120Hz, so if you're running a high refresh rate monitor you'll want to use the DisplayPort output.

WiFi 6 performance in our testing was solid. Connected to a WiFi 6 router about five metres away through one wall, we were seeing around 500 to 600 Mbps consistently, which is more than adequate for any home or office use. Bluetooth 5.2 paired with a wireless keyboard and mouse without any issues, and the connection stayed stable throughout the testing period. Gigabit Ethernet is there if you want a wired connection, and for anything latency-sensitive like video calls or remote desktop work, wired is always the better choice. The Ethernet implementation felt reliable in our testing, no dropped packets or connection instability.

The installation was clean in our testing. No obvious bloatware beyond what Microsoft includes by default in Windows 11. There was a GMKtec utility app pre-installed that handles fan speed profiles and some basic system monitoring. It's lightweight and actually useful, letting you switch between a quiet mode and a performance mode depending on what you're doing. I left it in performance mode for most of the testing period and switched to quiet mode when I was just doing light work and wanted the fan to calm down.

Windows 11 activation was genuine and tied to the hardware, which is what you want. Some grey-market mini PCs ship with volume licence keys or OEM keys that can cause activation issues down the line. This one activated cleanly and showed as properly licensed in the system settings. Driver support was complete out of the box, with all hardware recognised and functioning correctly from first boot. Updates installed without any drama. Honestly, the software side of this machine is one of its stronger points. It just works, which is exactly what you want from a prebuilt.

Storage is the main upgrade path. The primary M.2 2280 slot holds the included NVMe SSD, and swapping it for a larger drive is straightforward. A 2TB NVMe drive will cost you around forty to sixty pounds and takes about ten minutes to install. If the chassis has a second M.2 slot (worth checking on your specific unit), you can add storage rather than replace it. That's a meaningful upgrade path for anyone who finds 512GB too limiting.

There's no GPU upgrade path. The Iris Xe is integrated into the processor, and there's no PCIe slot for a discrete card. If you need more graphics performance, you'd need to look at an external GPU enclosure connected via Thunderbolt, but the i7-11390H's Thunderbolt 4 support on this specific implementation needs verification before you commit to that path. The power brick is a 65W external unit, which is not upgradeable or swappable for anything more powerful. The machine is what it is thermally and graphically. Buy it for what it does now, not for what you might want it to do later.

The Intel NUC 12 Pro uses a more recent Alder Lake chip with a proper efficiency core architecture, which gives it better sustained multi-core performance and improved power efficiency. It's also a more established brand with better long-term driver and firmware support. The Beelink SER6 Pro goes a different direction with AMD's Ryzen 7 6800H, which includes RDNA 2 integrated graphics that are significantly more capable for gaming than Intel Iris Xe. If light gaming matters to you, the Beelink is the stronger choice.

Where the GMKtec holds its own is the Windows 11 Pro inclusion and the overall build quality for the price. Some competitors at similar price points ship with Home, which is a meaningful difference for business users. The port selection is also competitive, and the dual display output works reliably. It's not the fastest mini PC in its price range, but it's not the worst either.

The honest limitations are these. The i7-11390H is a 2021 mobile chip, and in 2026 that's showing its age against more recent competition. The RAM is soldered at 16GB with no upgrade path. Gaming is limited to casual and older titles. And the price tier this sits in is competitive, meaning there are alternatives with newer silicon and better integrated graphics for similar money. The Beelink SER6 Pro's RDNA 2 graphics are genuinely better for gaming. The Intel NUC 12 Pro's upgradeable RAM is a meaningful advantage for power users.

But here's the thing. If you need a small, reliable, professional-looking machine for home office work, light productivity, and occasional casual gaming, and you want Windows 11 Pro out of the box without faffing about, this machine delivers that. It's not the best mini PC money can buy in 2026. It is, however, a solid choice for the right buyer. I'd give it a 6.5 out of 10. Good at what it does, honest about what it isn't, but slightly overpriced given the age of the platform and the soldered RAM limitation.