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GMKtec

GMKtec K12 Gaming Mini PC Oculink AMD Ryzen 7 H 255 (Upgraded 8745HS) 32GB DDR5 RAM 512GB SSD, Desktop Computer Radeon 780M Graphics, 3X M.2 2280 Storage Expansion, Dual NIC 2.5G, HDMI 2.1, USB4

Based on 306 reviews
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$749.99
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Arrives Saturday, Oct 31
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At a glance

Condition
New
Size
R7 H255 32GB DDR5 + 512GB
Model
K12
Storage
32 GB
Dimensions
7 x 7 x 5 in
Color
Gunmetal(K12)
Operating System
Windows 11 Pro
Warranty
1 year warranty
Works with
Headphone, Keyboard, Monitor, Mouse, Television

Features 8

  • RYZEN 7 H 255 CPU - The Ryzen 7 H 255 is a chip from the Hawk Point family and is an upgraded version of the older Ryzen 7 8745H and has 8 cores (16 threads thanks to SMT support) that run at up to 4.9 GHz, together with the powerful Radeon 780M iGPU. Unlike Zen 3, Zen 4 offers AVX512 support along with other improvements such as larger caches/registers/buffers across the board.
  • GAMING PC - The Radeon 780M (12 CUs / 768 shaders, up to 2,600 MHz) can drive multiple displays simultaneously with a resolution of up to 8K. Hardware encoding and hardware decoding of the most common video codecs (AV1, AVC, HEVC) is also no problem; playing the latest games on FSR settings without issues.
  • 32GB DDR5 RAM + 512GB SSD - The K12 mini computer is equipped with Dual 16GB (Total 32GB) SO-DIMM DDR5 5600MHz memory sticks. 512GB PCIE 4.0 SSD Drive with 3x M.2 2280 Expansion slots. Each slot capable of reading up to 8TB. (24TB MAX)
  • QUAD SCREEN 4K DISPLAY SUPPORT - K12 Mini PC support 4-screen 4K/8K output via HDMI 2.1 (8K@60Hz), DisplayPort 1.4 (4K@60Hz), and USB Type-C Transfer speed (supporting PD3.0/DP1.4/DATA). Ideal for gaming, video editing, and multitasking, it provides expansive and crisp multi-display support.

Description

1 Year War~ranty, 24Hr Support. Amazing discounts for Business Buyers. Follow our brand for deals and updates. Shenzhen GMK Technology Co., Ltd is a high-tech enterprise integrating scientific research, development, production and sales of Mini PC and Computer Accessories. Our company was established on June 6, 2019 and our core team is composed of engineers with 20 years of experience in consumer electronics. It was our shared dream that brought us together as GMKtec. GMKtec manufactures professional Mini PC computers. GEEK | We aim to provide the ultimate product experience for users around the world. MODERN | We aim to provide users with cutting-edge technology products. (K) Creative | We always adhere to the innovative spirit of keeping pace with the times. The GMKtec mini PCs are widely used at office, home theater and bussiness. All computers support customer customization. Due to global market constraints, DDR4/DDR5 RAM and SSD storage prices are on the rise. If you have been planning a PC build or storage expansion, now is the time to buy. Current inventory is still available at existing rates, but forecasts indicate costs will continue climbing. Don't wait until it costs more—lock in your savings today and upgrade with confidence. Equipped with the latest AMD Ryzen & Intel Processories. Built-in GPU for smooth framerate and gameplay. Witness the raw power of the GMKtec K12 mini PC! This video tests its AMD Ryzen 7 H 255 processor in Baldur’s Gate 3 and Borderlands 3. See how its integrated 780M iGPU performs as a standalone system, and then watch the massive performance leap when its OCuLink port connects to a Radeon RX 7600 XT eGPU (Not included). We compare results against similar mini PCs, showcasing how the K12’s superior 65W sustained TDP and robust cooling deliver unbeatable performance.

Specs 62

Brand GMKtec
Operating System Windows 11 Pro
CPU Model AMD Ryzen 7
CPU Speed 4.9 GHz
Cache Size 32 GB
Graphics Card Description Integrated
Graphics Coprocessor AMD Radeon 780M 2600 MHz
Memory Storage Capacity 32 GB

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If you place your order now, the estimated arrival date for this product is: Saturday, Oct 31

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Top Amazon Reviews

GMKtec K12 Gaming Mini PC: A C&C Generals Fan's Compact Powerhouse
Size: R7 H255 32GB DDR5 + 512GB
As a PC enthusiast since the dial-up era, I’ve built my share of rigs to fuel epic Command & Conquer: Generals and Zero Hour sessions. I’m not chasing high-end FPS titles—give me base-building and Shockwave tank rushes at 60fps any day. The GMKtec K12 Gaming Mini PC, with its AMD Ryzen 7 8745HS, 32GB DDR5, 512GB SSD, and Radeon 780M graphics, has become my go-to for strategy gaming and everyday tasks. Here’s why this tiny titan earns my nod. This thing is small—think hardcover book size—yet it’s a beast. Setup was a breeze; Windows 11 installed without a hitch, dodging Microsoft’s TPM 2.0 roadblocks. I went local user mode for privacy, and it just worked—no workarounds needed. The K12’s quiet operation is a standout; even during intense Zero Hour GLA campaigns, the fans barely hum. It’s a far cry from the roaring towers of my past, perfect for late-night gaming without disturbing the house. Performance? Stellar. The Ryzen 7 and 32GB DDR5 chew through Generals and Zero Hour at 1080p, delivering silky-smooth battles and fast load times thanks to the NVMe SSD. The Radeon 780M handles particle-heavy Scud Storm effects flawlessly. I’ve also dabbled in Age of Empires II Definitive Edition—high settings, no lag. Multitasking is effortless, with browser tabs and Discord running alongside game sessions. Three M.2 slots and dual 2.5G NICs scream future-proofing, though I’d grab a USB hub for extra peripherals. Downsides? The port selection (HDMI 2.1, USB4, etc.) is solid, but heavy peripheral users might need a dock. Thermals are great, but place it in a well-ventilated spot for marathon sessions. At roughly $500, it’s a steal for the power. For C&C fans like me who want a compact, quiet rig that crushes strategy games without the hassle, the K12 is a winner. Five Stars—ready to command and conquer. ... show more
Reviewed in the United States on September 27, 2025 by W4d3101
Good mini pc for the money.
Review Image by Bill
Review Image by Bill
Review Image by Bill
Review Image by Bill
Review Image by Bill
Review Image by Bill
I've had a Intel NUC with a Core i5 for a little over 6 years but it was starting to show it's age a bit. One of the ram slots died, it would not boot if I had any ram installed in the second slot. The CPU fan was also wearing out; 3rd party options that I tried were less than stellar. So after dealing with those issues for a little over a year, I decided it was time for a replacement. It was a good pc but it's time had come. Wanted to stay with a small form-factor pc for various reasons. After checking out other options that are available, I settled on this NucBox K6 from GMKtec. It has a Ryzen 7 7840HS cpu, 32 GB of DDR5 ram and 1 TB NVME drive. I added a spare 1TB NVME drive I had to double my storage as well. Small footprint, supports 3 monitors, option to upgrade/replace components as needed with 2 user-serviceable slots for both m.2 drives ram. It's also fairly easy to take it completely apart for cleaning the CPU fan. The auxiliary case fan is a standard 40mm x 10mm pc fan; that will be simple to replace when/if the fan dies. Ticks all the boxes for me. After working with this for over a month, I've had no issues. There was no extra bloatware installed out of the box that I could find. Windows 11 has been running just fine with updates on. I do a little bit of everything with this computer: I've ripped several hundred DVDs and Blurays (with an external Bluray drive and MakeMKV) re-coding said rips with Handbrake for our media server. Some video editing with CapCut. Some light gaming. FreeCAD for designs for my 3d printer. Photoshop. Inkscape. This computer runs circles around my old IntelNUC. All that said, one thing I don't like about this computer is that there is only one USB C port on the front. The USB C port is what is used for the 3rd monitor hookup. I did not want a cable sticking out of the front for this, so I took it upon myself to address this issue. I designed a new top to replace the top from the factory. It houses a short USB C extension cable with a panel mount jack for ease of installation in the new upper housing. Works great. I can have everything plugged in to the back with minimal excess on the front. The extension plug is also loose enough in the new extended lid to unplug and move aside if I need to plug something in to the USB C port without having to take the new housing apart. I didn't print it with the best settings and it wound up being a little bit taller than I'd like but works for my needs now. I saw another review complaining that the AMD Ryzen 7 PRO 6850H is not running at the speed listed. The listing on Amazon states 4.7ghz, and his is showing it running at 3.2ghz. The speed listed on the Amazon listing is the turbo speed. If you check AMDs website on the CPU you'll see it's normal speed listed at 3.2ghz and it turbos up to 4.2ghz. This CPU is running at spec per AMDs webpage. That is not the CPU that came with mine but I wanted to share that info to avoid confusion. The CPU in mine runs to AMDs specs with no issue. Very happy with my purchase, I hope to get many years of use out of this. ... show more
Reviewed in the United States on September 4, 2025 by Bill
Blue screens for different issues, many event log errors, many outdated drivers
Snappy, but already 4 blue screens in 1 day, consistent audio jack noise (audio ok via display port and monitor). Why did they turn off driver updates? This unit may be going back as i've already spent many hours setting up and especially looking for potential causes of the issues. Promised to be a nice unit if it didn't have all these issues.... Update1 Several days and attempts to see where the culprit lied causing unexpected reboots, event log littered with errors, initiating a return. To clean up the PC I ran a reset which required a download of Windows 11 from Microsoft. That installation appeared to run much smoother, and the PC seemed ok... for a while... and then the reboots and errors came up again (after installing the audio driver & codec from GMKTec).... (btw... Aux out audio still sucks). I found that the realtek ethernet controlled had a very old driver, hence updated that. Keeping my fingers crossed that this was the main culprit hoping not all was lost so I can cancel the return.... Either case... it seems the issues all stem from a real old image and lack of updated drivers (With exception of the AMD processor noises on the external audio out - not sure that can be fixed with a driver update...). Update2 GMKTec reached out a couple times with several options - The first being a return for refund. Because of my time invested already, I opted to dig a little deeper and work with GMKtec on resolutions. After implementing a few fixes for the most critical items that seemed to have caused the blue screens and at least one of the eventlog errors. it has been more stable for the past 1+day. Keeping my fingers crossed that this will be resolved as the specs on the unit is what I am looking for. The audio noise issue appears to be an incompatibility issue with the kvm switch. Separating audio / re-cabling some of my setup may resolve the processor audio noise issue. Working now to resolve some ongoing errors and warnings as well in the event logs. If we can resolve this to be a stable unit for at least a week, I will go ahead and increase the review ratings. Sidenote: I purchased another unit from them (N150) for a Plex server about 6 months ago and that one has been running great to date. This is why I opted to get this more powerful unit from them this time. Update3: After spending some more time updating drivers, settings, etc... it seems to be running more reliable now. This included complaining to microsoft about windows11 lack of self healing technology. The unit still has many warnings in the event log, mostly dcom. A day later i received (what appeared to be) a targeted update to the system that sounded like it would provide enhancements in that area. Bottom line... Its been more stable for 3 days now so I updated the rating as the performance of this computer is awesome for my use. I didn't give it 5 stars yet because i'm still strying to figure out why it is more sensitive (than my other computers) to processor noise on audio with my multi system setup and i need to see more stable performance over time for me to feel comfortable that there aren't any other underlying issues. GMKtec agreed to extend my warranty and I appreciate them working with me on the issues. ... show more
Reviewed in the United States on July 15, 2025 by Techie
(K12 - Ryzen 7 H 255) Great value, exceptional hardware and connectivity
Size: R7 H255 32GB DDR5 + 512GB
This is specifically for the K12 with the Ryzen 7 H 255. Honestly, not a bad deal. The CPU is pretty good for its class, and has very acceptable integrated graphics. The H 255 is seemingly only sold to the chinese market, has no real documentation officially (as of the time of writing), and is essentially a recycled die from better chips that didn't meet the cut so to speak (at least as far as I can find), but I don't see any of those as a real problem; die recycling is perfectly fine if it actually works and is stable, and AMD is usually pretty good at the latter... and it makes me feel a little better that AMD can save something that would otherwise end up being e-waste. Despite the borderline unofficial nature of the CPU, I have not experienced any performance issues, instability, or crashes of any kind after a few weeks. Note that I updated the BIOS and microcode immediately after receiving the unit, and I suggest everyone do the same. The unit itself is from GMKtec, which is a chinese company. However, there were some (good) surprises in the box that tells me they actually cared about the end user experience, though possibly only just enough to make sure that the average joe blow didn't immediately return it because they got pissed off at something that would honestly be Microsoft's fault (eg. the horrendous OOBE for Windows). I choose to believe they actually care though, and somewhat reinforcing that, my email to them was answered the next day (I'll get to what the contents of that was later). The specs of the unit, aside from the CPU which is pretty good itself, are actually darn incredible. OCuLink is a quasi-rare connector, but an *extremely* welcome one! That significantly improves the unit's lifespan and enables mostly modern gaming, provided you genuinely do the research into how to use it (remember, don't plug or unplug it when the PC is on!), though it can already handle light-medium gaming with just the integrated graphics. Though I have not tried the OCuLink port yet, I have no reason to believe it doesn't work or anything like that. USB4 is also extremely welcome, and I can confirm that it not only works, but it follows best practices of how to implement the protocol. Since the port does do PCIe tunneling, it should work with all Thunderbolt 4 appliances out of the box. GMKtec could have taken the cheap way out and omitted this detail, but they did not. Absolutely incredible to have both of these available. There are also, seemingly (I have not opened the unit up yet, no reason to), three M.2 slots, one at Gen4x4 and two at Gen4x2, which is perfectly fine in terms of speed and great in terms of how many slots they offer. I cannot think of any other mini PC with this level of overall connectivity. You lose out on some external USB connectors that would otherwise be present, but USB4 seriously more than makes up for it. The dual 2.5G LAN ports are just the whipped cream on top of all this. Though, not all can be as good. There is no S3 power state support in the firmware, so you're stuck with shutting down the computer, hibernating it, or relying on Microsoft's absolutely abysmal "implementation" of sleep in the form of modern standby (S0). This was confirmed in my aforementioned email to GMKtec's support. Oh well, I have the whipped cream but miss out on the cherry. This may be an oversight on GMKtec's part, but it may also be difficulty getting S3 implemented with OCuLink. Don't know exactly how that works. I'm tempted to knock a star off for this, since S3 is a very, very nice power state to have available, but it's something I'm personally not terribly concerned about, especially with everything else so good. Please, if you're reading this GMKtec, add it in a BIOS update! Would love to see it! There may also be an issue with the TPM, specifically in regards to when the firmware tells the OS to initiate S0 sleep (eg. from the power button short pressed). In such an event, when the computer resumes from S0 the TPM will either fail or lock up. This may be an issue with Windows, or with the TPM, or with just my unit, and it requires a reboot to clear it up. Either way, my way around it is to leave the unit turned on or to just shut it down, but again it's not a concern for me personally, and YMMV. Overall, I would recommend this unit. Though I have not opened it to inspect the internals, nor tested the OCuLink connector yet, I see great value in this unit, and I imagine I will keep it around for a very long time, getting significant usage out of it. I would give it 4.5 stars if that were possible, but for Amazon I will leave it at 5. ... show more
Reviewed in the United States on November 1, 2025 by Kaine
A great mini pc
Size: R7 H255 32GB DDR5 + 512GB
Absolutely love it,its powerful enough to play games a lot of games, i had emulators from PS3 to Switch working on it along with a some high end gaming at lower setting, but paired with an AMD 7600M XT egpu, it can handle most games at 1080p 60fps. It's compact and quiet with 2 big fans to keep it cool. Highly recommend if you want something cheaper and smaller that a desktop ... show more
Reviewed in the United States on July 8, 2026 by Noct'Til
Powerful little machine, but finicky with egpu. Great support.
This is a great mini PC for the price. By itself it can be used as a small but powerful office or development machine, or even for light gaming. However, when you throw in an eGPU it readily opens up alerting you to do much heavier lifts, like video editing or regular gaming. The only I don't give it 5 stars is that despite it having a USB 4 port, I was unable to use my Razer Core X with the device. Nothing I could do wroth get it detected. I reached out to support abs they were very helpful. I exchanged emails with Julian, who was very knowledgeable and walked me through several rounds of trouble shooting. In the end we determined something about the Razer Core X and the USB4 implementation on this device is incompatible. I was able to get my hands on a different eGPU - and AD-GP1. This eGPU worked perfectly. It was simply plug and play since the AMD drivers were already installed. ... show more
Reviewed in the United States on June 27, 2025 by Matt
A rough start
I’ve never owned a mini pc. This was recommended by a YouTube channel I watch so I gave it a shot. Right out of the box, I had quite a few issues. Kept shutting down and giving me a blue screen that flashed so quick I couldn’t read the errors. I was close to sending it back tbh. After a little research.. I went ahead and updated windows, which was quite a big file, didnt really want to do all that, but you must. I also had to download a new version of bios. It’s a bit tricky getting all of this accomplished for anyone who isn’t familiar. I could see someone that doesn’t have a ton of experience having issues with this. Now after all that, it’s been running and has actually been pretty good so far. It’s a pretty powerful machine once it’s up and running. It’s built well, I’ve taken it apart to add hardware to it. It’s very capable. There are some settings you can tweak to get it running extremely quiet. Changing the processor from aggressive to normal is the key, with essentially no loss of performance. It runs but doesn’t get hot which is nice. It runs quite a few games pretty well. It’s not a 4090, but it works. It’s excels at emulation, it pairs well with Emudeck, runs it flawlessly. Does simple tasks relatively quick. I’ve since added an eGPU and since then it’s been great. It’s super small and can be placed almost anywhere or even taken with you on the go. It’s sleek and honestly I’m very happy with it now. If you utilize what it has to offer, you’ll be happy with it. ... show more
Reviewed in the United States on November 15, 2024 by EDWARD J. GASPER
Perfectly capable little computer, great form factor
Review Image by natalie paris
Review Image by natalie paris
Review Image by natalie paris
Review Image by natalie paris
Review Image by natalie paris
This is a very neat little box of a computer, and if you know what you plan to do with it, I think it's a pretty good value. Basic setup is extremely simple, literally just plug in your mouse/monitor/keyboard and the power supply and turn it on. It booted with zero issues into the normal Windows 11 setup. For some reason the manufacturer recommends that you do not use a LAN cable when you first start the computer, but I was never planning on using it on anything but wifi, and it worked fine over wifi, so that is not a problem for me. Although I am planning in the future to install Linux on this machine, I was grateful that it came with minimal Windows 11 bloatware (just the windows standard stuff). Although initial setup was very fast, as soon as it connected to the internet it discovered that it had a year's worth of Windows updates to install, which takes a while, so the second time you restart the computer, expect it to go through a long update process (10-15 mins). I had no trouble hooking up Bluetooth peripherals (in my case a controller). If you are planning to use this computer for general purpose web browsing/word processing/light home server use/etc, you will have zero problems. For general purpose tasks, this computer is great. It's extremely snappy when browsing the web, downloading files, and running programs like Steam or Discord. I think advertising this as a gaming PC is a bit of a stretch-- there's only so far integrated graphics will get you, and I suspect this computer will suffer if you try to run any truly top of the line games on it. It is great for older games, or lighter indie games. I tested it on Fallout New Vegas and Celeste and it had zero issues whatsoever. I ran a benchmark test and it performed predictably poorly compared to computers with dedicated graphics cards. You can get a little more juice out of this machine by changing the allocation of VRAM in the BIOS. It's by default set at 3GB, but I went in and bumped it up to 8 (see the options in the pictures). After doing that, I didn't notice any performance dips from reallocating away the regular RAM. The 32GB this machine comes with is very generous. Even when I was trying to stress-test this machine, it was very quiet, and putting my hand on the top of the case, it never produced a ton of heat. The best way I could describe this machine is unobtrusive-- it's really small and could easily be mounted beneath a desk to completely hide it away. The power supply it comes with is almost the same size as the computer itself. The computer comes with a mounting bracket that I think is intended to be used to mount it to the wall. My one grumble is that the 1TB of onboard storage will run out pretty quickly if you're a person with a large media library like I am. I am not sure how upgradable the storage is, but I guess I can always just attach an external hard drive if I need more storage. The display options are HDMI and DisplayPort, which is fine. I wish the audio jack were on the back of the box rather than the front, but it is what it is. It comes very well packaged, works right out of the box, and performs exactly as expected. If you have a need for general purpose computing in a small form factor, this will serve that need. ... show more
Reviewed in the United States on July 10, 2025 by natalie paris
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