What It Is
A compact gaming-class mini PC powered by the AMD Ryzen 7 H 255 (8745HS-class) processor with Radeon 780M integrated graphics.
Key Features
- AMD Ryzen 7 H 255 (upgraded 8745HS) processor
- Radeon 780M integrated graphics
- WiFi 6E and Bluetooth 5.2
- USB-C connectivity
Specifications
- Brand: GMKtec
- Model: K12
- Processor: AMD Ryzen 7 H 255
- Graphics: Radeon 780M
| Weight | 2.142 lbs |
|---|---|
| Dimensions | 35 × 20 × 9 in |
| Brand Name | GMKtec |
| Memory Capacity | ≤ 128MB |
| Hard Drive Capacity | ≤ 40 GB |
| Model Number | GMKtec K12 |
| Processor Model | AMD Ryzen 7 H 255 |
| Use | Multimedia |
| Type | Mini Desktop, Mini PC |
| Processor Main Frequency | 4.9GHz |
| Graphics Card Type | Integrated Card |
| Processor Brand | AMD |
| Color | Amd ryzen 7 h 255 |
| Plugs type | Eu |
| Bundle | No ram no storage |
5.0
100% Recommended (55 of 55)
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s***r
I’m really using it well right now.
It’s good for the price.
I should have bought one more, but while I was hesitating about the SSD, it sold out.
I will have to purchase again during the next discount period.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
u***A
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Great product and fast shipping.
I only worked ptm7959 thermal pad replacing
It shows great cooling, very lower temperature of cpu during cine r23 multicore bench testing.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It’s a model without RAM and storage, but I bought it because of its expandability, build quality, cooling performance, port configuration, and other factors. I haven’t been able to use it yet because I haven’t found any RAM, but I think it will be good.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
연***r
I have received the correct product.
It works well.
With a DDR5 4800 16×2 configuration, the Cinebench Multi score is 16,000 points and the Task score is 2,734 points.
It definitely controls heat better than the old can-shaped mini PCs, probably because it has dual cooling.
I’ll have to try it out and then think about whether to work with the PTM 7950.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I really like it. Delivery arrived in 5 days.
It was easy to disassemble and even the booting process worked perfectly.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
S***o
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
The delivery arrived faster than expected and the packaging was neat. When I actually received it, it wasn’t much different from the description and overall I’m quite satisfied. It’s good for the price, so I think I’ll repurchase if needed.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Okay, I’m using the M6 and I’m going to buy another one.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
The RAM and NVMe were expensive, so I only bought the main unit. Fortunately, it’s compatible with the RAM and NVMe I already had. You can download it from the manufacturer’s website by searching the product name, which is nice. I installed it with Windows 11 22H2 that I had before, and it automatically upgraded to 25H2 smoothly. The only downside is that I think I need to use more than 32GB of RAM. I plan to use it for simple tasks like document writing, so it’s good in terms of cost-performance. Please note that it doesn’t support YouTube 8K or higher. I think I need to look into this.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It works well fast shipment and good quality
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
H***K
Received well.
First of all, I received it well and confirmed that it boots properly.
Thank you.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I bought it to use as a sub, but the performance is much better than I expected.
Casual games run smoothly, and even Diablo 4 runs well enough to be enjoyable without any interruptions.
The noise is really quiet when surfing the internet.
When the game or loading screen freezes and the music doesn’t play, it’s quite annoying.
It generates quite a bit of heat, so I think using it separately might allow for longer use.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
一応動作確認も済み、現状異常無しとなりました。 説明通りのとてもコスパのいいベアボーンモデルです。 ただ、同じ仕様の物を日本の人が購入する場合、コンセントプラグはアダプタを買うより少し奮発して、画像なようなeu式の電源タップを一つ購入しておく方が良いと思います。 アダプタはやはり抜けやすいけど、電源タップだとガッチリしてますからね。 付属のacアダプタは100～240vの物なのでコンセントプラグだけきちんとしたら普通に使えます。
(*´︶`*) ♡ Thanks!
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I bought this to get rid of my desktop and I am extremely satisfied. Sell a lot!
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Delivery was very fast. The computer was packed excellent .
I didn’t test it (still waiting for memory and disks) but no see any problem.
The seller is very recommended!
Have a good business!
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I liked it so much that I bought it again. It’s very cost-effective.
It’s just that the prices of DDR5 and NVMe are so high that it’s more expensive than a ship. Haha.
But the mini PC is really great! !! !
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
h***r
Since it’s a barebone model, I prepared the SSD and RAM in advance, and it was installed well and worked well. The built-in graphics are also excellent, but when I connected the 4070 Ti SU via an OC link, the performance was similar to or even better than a 5700x DDR4 desktop. I made a good choice.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
k***k
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Best value for money, also suitable for eGPU setup via OcuLink
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Very good. The quality is impressive for this price.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I upgraded from the 6600h and am very satisfied.
However, it’s a bit disappointing that it’s bigger than the 6600h.
I don’t know if it’s useful to have three SSD slots, but having an external graphics port is nice.
What I mainly do is open the stock window and play the Diablo series in windowed mode, and if I lower the options in Diablo 4, it runs comfortably at close to 60 frames per second.
For reference, the 6600h had 40 frames per second and the Dia3 was comfortable.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I bought it at a low price during this Ali sale, it works well and is great.
I bought it at a low price during this Ali sale, it works well and is great.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It arrived quickly. Fast speed, 2x16GB DDR5 from Sinbenchi
I got a multi-score of about 15,700 using a 1TB NVMe drive.
It’s refreshing.
Luckily, I had purchased the RAM before the price went up, so I got a good deal.
The downside is that if the adapter breaks, they don’t just replace the adapter but ask you to send back the entire product, so I had to buy the adapter separately from the market.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It was delivered 5 days after purchase.
I bought it during the Singles’ Day event and liked it so much that I ordered another one.
Fortunately, I had an extra SSD and memory, so I installed them right away and am using them.
It operates quietly and performs well, so I’m very satisfied.
For the time being, I think I’ll only use a mini PC because the PC isn’t cost-effective enough.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
The design is also clean and nice.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Good.
Very good.
Okay
Good.
Very good.
Okay
Good.
Very good.
Okay
Good.
Very good, I like it.
Good.
Very good.
Okay
Good.
Very good.
Okay
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I ordered on Sunday and received it on Saturday~
The delivery was quite fast and arrived safely.
I am very satisfied with the performance.
I connected the saved RAM and SSD, and it works well.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I have both Makoto and Lulu.
The performance difference is minimal, K12 wins.
However, K12 is a very well-made product.
Perfect from cooling to BIOS
Easy to manage and good for thermal grease replacement work.
I am very satisfied.
If it’s GMK, I can trust and buy it.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It’s cheap and the delivery is fast. As for performance, I’m familiar with both the 8845 and 8755 because I’ve used them before.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
S***o
Very happy with the mini pc so far. One important note for other buyers: my unit was unstable with a corsair vengeance ddr5 kit, even though the ram passed multiple memtest runs. After switching to jedec-standard ram, the crashes stopped. The gmktec k12 bios does not expose any xmp or ram tuning options, so i’d recommend using plain jedec ddr5 rather than high-speed xmp kits.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
M***s
Fast postage, barebone so still waiting for components, will update in next couple of days but on specs, and price… very hard to beat. Not stressed, gmktek are reputable.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It’s quite fast for international shipping.
I’m very satisfied with the performance. Since it’s a barebone model, I used the existing SSD and RAM, but the CPU and built-in GPU seem to be quite good.
Above all, I was surprised that the EU plug fit perfectly when I received it. Thank you.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It works well and definitely has good cooling performance, and the CPU temperature is…
Maintains well at around 50 degrees.
The finish is also good, so I recommend it.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
c***g
It’s okay… I re-applied thermal paste with MX-4. The fan noise is a bit louder than other mini PCs, but it’s slightly sharp… If I apply thermal paste and adjust the fan to 40%, it’s okay… If I place it under the desk, I can’t hear the noise well.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
R***z
Excellent equipment, I have also had the K8 and this one is much better.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
A***a
Added 16gb and 512 m2, so far no issues, no freezing or loud fan noise, i love it and i hope it lasts long, definitely buying another one when rams become available
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It arrived quickly after ordering. The product has a neat finish and a simple design, making it pretty.
After installing the parts and Windows, the speed is extremely fast. I bought it for office use and light gaming, but its performance is outstanding. It is the best cost-effective mini pc. Those who are considering won’t regret choosing it. I will use it well!
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
j***r
It’s a great, blue chip company that has been for a long time. The pc looks great. However, i haven’t gotten my hands on it yet. Specs wise, it’s undoubtedly one of the best pc.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
T***g
It’s much quieter than the existing M6 and the performance is good haha. The RAM cost is expensive so it’s a bit slow but it’s fast. It’s much quieter than the existing M6 and the performance is good haha. The RAM cost is expensive so it’s a bit slow but it’s fast. It’s much quieter than the existing M6 and the performance is good haha. The RAM cost is expensive so it’s a bit slow but it’s fast.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It is a cost-effective mini PC. Recommended.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I became interested in mini PCs and bought one for the first time.
The performance is better than the notebook and desktop at home.
After replacing the thermal, it dropped by 10 degrees.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
H***u
I quickly received the product, assembled the SSD and DIMM, and confirmed that it operates normally. I will use it well.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Y***G
very good
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I also purchased the K8P during this Singles’ Day sale, and it has better heat dissipation capability than the K8P. However, it would have been better if the top suction port had become wider as the size increased… If you use it with the fan speed fixed at 40%, the noise is definitely less. The downside is that it cannot be applied with PWM and can only set fan speed at fixed ratios of 0 20 40 60 80 100. It would be nice if there was a BIOS patch.
The RAM setting can go up to 16GB, making it quite versatile among MIPs.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
There is no fan noise that I was worried about, and the performance is very good. I am satisfied.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
a***r
The downside is that the fan noise is loud. I’m not sensitive to noise, so I’m satisfied. The build quality is excellent. Especially, the fast delivery was great.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Y***N
The quality and performance are excellent for the price. It’s larger than expected and has a good cooling system. It’s quiet.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
D***e
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
a***r
I received it quickly and am currently installing Windows after assembling the laptop and SSD.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
It’s mini, but it’s not as small as it seems.
Ample space with slots for additional upgrades
Assemble the parts by putting them together.
Will the game performance really be good…
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
K***r
It’s really an excellent computer.
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU
Anonymous
I bought it as a barebones and assembled it with some difficulty, but it works well. Unlike the N100, there are no issues with 4K video 🙂
Color: AMD Ryzen 7 H 255 Bundle: No Ram No Storage Plugs Type: EU