---
product_id: 573492069
title: "GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4"
brand: "gmktec"
price: "$2418.90"
currency: USD
in_stock: true
reviews_count: 9
category: "Gm Ktec"
url: https://www.desertcart.us/products/573492069-gmktec-gaming-mini-pc-amd-ryzen-7-h-255-upgraded
store_origin: US
region: United States of America
---

# Ryzen 7 H 255 CPU, 8 cores @ 4.9GHz 64GB DDR5 5600MHz RAM + 1TB PCIe 4.0 SSD Quad 4K/8K display support via HDMI 2.1 & DP1.4 GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4

**Brand:** gmktec
**Price:** $2418.90
**Availability:** ✅ In Stock

## Summary

> 🚀 Compact Powerhouse: Desktop Performance Without the Bulk

## Quick Answers

- **What is this?** GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 by gmktec
- **How much does it cost?** $2418.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/573492069-gmktec-gaming-mini-pc-amd-ryzen-7-h-255-upgraded)

## Best For

- gmktec enthusiasts

## Why This Product

- Trusted gmktec brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Next-Level Graphics:** Radeon 780M iGPU drives up to 8K resolution with smooth hardware encoding and decoding.
- • **Powerhouse Ryzen 7 H 255:** 8 cores, 16 threads, up to 4.9GHz for seamless multitasking and gaming dominance.
- • **Future-Proof Connectivity:** Dual 2.5GbE LAN, WiFi 6E, Bluetooth 5.2, and Oculink port for ultra-low latency and expandability.
- • **Ultimate Multi-Display Setup:** Supports 4 simultaneous 4K/8K screens via HDMI 2.1, DisplayPort 1.4, and USB-C for immersive multitasking.
- • **Massive 64GB DDR5 RAM & 1TB SSD:** Blazing-fast memory and storage to crush productivity, gaming, and creative workflows.

## Overview

The GMKtec Gaming Mini PC NUCBOX K12 packs a serious punch with an upgraded AMD Ryzen 7 H 255 CPU, 64GB DDR5 RAM, and a 1TB PCIe 4.0 SSD. Designed for professionals and gamers alike, it supports quad 4K/8K displays, boasts advanced Radeon 780M graphics, and offers future-ready connectivity including dual 2.5GbE LAN, WiFi 6E, Bluetooth 5.2, and an Oculink port for eGPU expansion. Its triple cooling fans with customizable RGB lighting keep performance cool and quiet, making it the ultimate compact desktop replacement for multitasking, gaming, and creative work.

## Description

Buy

Review: Fantastic mini pc proper desktop replacement performance - The short version: If you need a compact, capable PC for productivity, media and even gaming the M8 delivers. I've been using this for about a week across everything from my regular BAU office work, to Genshin Impact and it's really handled everything i've thrown at it. Unboxing & Whats included: GMKTec's packaging is clean, well organised and presented quite well. Inside you get the M8 unit itself, a power brick with UK cable, HDMI cable, warranty information. Everything is sealed and in perfect condition, and the colour scheme of the PC itself looks smart on a desk. First boot & Setup: Windows 11 Pro came as completely clean install, no bloatware, no unneeded software pre-loaded. Just a fresh windows setup wizard. Took me about ten minutes to get through initial configuration and I was ready to go. Really appreciated not having to spend an hour uninstalling useless software. Or fresh flashing windows. Connectivity: Serious it's well eqipped You can read the product description and get the idea of the port situation, but it's been covering everything for me. I've had it hooked up too a 4k monitor + 240hz 1080p monitor and not a lick of delay. Performance Testing: I did Geekbench 6 testing and CrystalDiskMark CPU: Single Core - 1976, Multicore - 7,877 GPU: 14,415 Storage: Sequential Read - 3564MB/s Write - 2677 Mbs These are really solid numbers, the Ryzen chip inside really trading blow with some desktop chips here which is impressive for something of this size. Real World Use: Office/Productivity: I spent the week using this for actual work, documents, spreadsheets, jira multiple tabs, video calls. Never felt sluggish, never had to wait for anything. Coding: VS code, running local dev enviroments, docker containers, all handled without complaint. Compilation times are respectable for the form factor. Media: 4K Youtube and local video playback, is entirely smooth no dropped frames, no stuttering Gaming: Heres where I was geniunely shocked, fired up genshin impact set up everything to high, and maintained a solid 60fps throughout. The 680m punches well above its weight. If you needed some triple A backup power, there is also the OCUlink option, being able to connect an external GPU is a huge dub for an already winning machine. Thermals & Noise: Under normal use its near silent, pushing it with benchmarks and gaming and the fan spins up but its not obnoxious just a gentle whoosh noise and the thermals stayed well controlled in my testing/use. Whos this for? Anyone wanting a proper desktop experience without the bulk. Home Office users, media centre builds, light gaming setups or if oyu just want to reclaim desk space tbh. Verdict: This is my second GMKTec device and they've nailed it again (I have the GMKPlus n150 which you'll see in my rack) excellent build quality, clean software, performance that surprises for its size, dual 2.5gbe ports make it interesting for network/homelab as well as the expandability via OCUlink. Highly recommended. Threw in some genshin footage on high, so you can see how it looks, and a quick mouse spin to show the lack of frame drop
Review: Great second mini PC from GMKTec - Great mini PC. Bought this to replace general home working PC after purchasing the K11 for my son (which is fantastic). No issues so far. Easy setup.

## Features

- 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.
- 64GB DDR5 RAM + 1TB SSD - The K12 mini computer is equipped with Dual 32GB (Total 64GB) SO-DIMM DDR5 5600MHz memory sticks. 1TB PCIe 4.0 SSD and 3x M.2 2280 expansion slots, each supporting up to 8TB (24TB max).
- QUAD SCREEN 4K DISPLAY SUPPORT - EVO-T1 AI 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.
- OCULINK PORT - The Oculink port on the rear interface enables higher bandwidth capabilities, better frame rates and lower lag. The standard also operates at PCIe x4 speeds, compared to Thunderbolt's x3. Gamers and content creators can benefit from Oculink's higher bandwidth, resulting in better performance and lower lag for eGPU setups
- FAST 2.5GBE + WIFI 6E + BT 5.2 - Ethernet 2.5GbE LAN port design provides more applications, such as firewall, multichannel aggregation, soft routing, file storage server. Built-in WIFI 6E / Bluetooth 5.2 is more stable and efficient to connect multiple wireless devices such as projector, printer, monitor, speakers and etc.
- TRIPLE COOLING FANS WITH LIGHTING - Dual turbo CPU fans + a massive DDR5/SSD cooling fan deliver silent, ultra-efficient cooling (just 35dB in Quiet Mode!), while the 3 advanced heatpipes and 360° airflow keep your Ultra 9 285H Mini PC frosty under heavy loads. Plus, 13 dazzling RGB lighting modes let you personalize your rig’s vibe.
- GMKtec Warranty- GMKtec offers a 1-year limited warranty for each mini PC, starting from the date of the purchase. All defects due to design and workmanship are covered. With a professional after sales team always ready to attend to your needs, you can simply relax and enjoy your mini PC

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0FK1THVX2 |
| Best Sellers Rank | 5,580 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 18 in Desktop PCs |
| Brand | GMKtec |
| Computer Memory Type | DDR5 SDRAM |
| Customer Reviews | 4.4 4.4 out of 5 stars (370) |
| Date First Available | 26 July 2025 |
| Graphics Card Description | Integrated |
| Graphics Card Interface | Integrated |
| Graphics Card Ram Size | 63.98 GB |
| Graphics Coprocessor | Radeon 780M |
| Graphics RAM Type | DDR5 SDRAM |
| Guaranteed software updates until | unknown |
| Hard Disk Description | SSD |
| Hard Drive Interface | PCIE x 8 |
| Hard Drive Size | 1 TB |
| Item Weight | 2.19 kg |
| Item model number | GMKtec NUCBOX K12 |
| Manufacturer | GMKtec |
| Maximum Memory Supported | 64 GB |
| Memory Clock Speed | 5600 MHz |
| Memory Technology | DDR5 |
| Number of HDMI Ports | 1 |
| Number of USB 2.0 Ports | 1 |
| Number of USB 3.0 Ports | 3 |
| Operating System | Windows 11 Pro |
| Package Dimensions | 35.6 x 20.7 x 9.2 cm; 2.19 kg |
| Processor Brand | AMD |
| Processor Count | 8 |
| Processor Socket | TSMC 4nm FinFET |
| Processor Speed | 4.9 |
| Processor Type | Ryzen 7 |
| Resolution | 7680x4320 |
| Screen Resolution | 7680 x 4320 |
| Series | GMKtec NUCBOX |

## Product Details

- **Brand:** GMKtec
- **CPU model:** Ryzen 7
- **CPU speed:** 4.9
- **Graphics card description:** Integrated
- **Graphics co-processor:** Radeon 780M
- **Memory storage capacity:** 1 TB
- **Operating system:** Windows 11 Pro
- **Personal computer design type:** Mini PC
- **RAM memory installed size:** 64 GB
- **Specific uses for product:** Everyday Use

## Images

![GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 - Image 1](https://m.media-amazon.com/images/I/61Dwn3KnogL.jpg)
![GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 - Image 2](https://m.media-amazon.com/images/I/71VTOOfHeZL.jpg)
![GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 - Image 3](https://m.media-amazon.com/images/I/71peC7eaopL.jpg)
![GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 - Image 4](https://m.media-amazon.com/images/I/71WIdwBHM0L.jpg)
![GMKtec Gaming Mini PC, AMD Ryzen 7 H 255 (Upgraded 8745HS) 64GB DDR5 RAM 1TB SSD, NUCBOX K12 Desktop Computer with 3X M.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 - Image 5](https://m.media-amazon.com/images/I/71UNnf6KlpL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does this support pd charger?**
A: Yes, the nucbox5 pro supports the PD charger. Also, the type C port(12V/3A)  is dc in only.

**Q: Can i formate it to run win 7?**
A: The best solution would be to buy a separate SSD drive, replace the original one and try to install Windows 7 on it, although I think there will be problems with the drivers. 
But this will allow you to keep the original Windows 11.
I bought a SABRENT 512GB Rocket NVMe PCIe M.2 2242 DRAM-Less Low Power Internal High Performance SSD (SB-1342-512) from Amazon https://www.amazon.com/gp/product/B07XVR1KKR/ref=ppx_yo_dt_b_asin_title_o06_s00?ie =UTF8&th=1 and installed Windows 10 Pro on it.
You can also first clone the original disk using for example Acronis to any one you have and then format and have fun with Win7 or 10.
But it requires minimal computer skills.
Good luck.

**Q: Can this be mounted on the back of a monitor?**
A: It doesn't come with a VESA mount but you could order the optional mounting tape.

**Q: Can a 2.5 inch 2TB SSD drive be added?**
A: There is no space on the inside of the PC for an 2.5 inch SSD. The only possible modification inside is to change the NMVE SSD.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic mini pc proper desktop replacement performance
*by R***E on 11 January 2026*

The short version: If you need a compact, capable PC for productivity, media and even gaming the M8 delivers. I've been using this for about a week across everything from my regular BAU office work, to Genshin Impact and it's really handled everything i've thrown at it. Unboxing & Whats included: GMKTec's packaging is clean, well organised and presented quite well. Inside you get the M8 unit itself, a power brick with UK cable, HDMI cable, warranty information. Everything is sealed and in perfect condition, and the colour scheme of the PC itself looks smart on a desk. First boot & Setup: Windows 11 Pro came as completely clean install, no bloatware, no unneeded software pre-loaded. Just a fresh windows setup wizard. Took me about ten minutes to get through initial configuration and I was ready to go. Really appreciated not having to spend an hour uninstalling useless software. Or fresh flashing windows. Connectivity: Serious it's well eqipped You can read the product description and get the idea of the port situation, but it's been covering everything for me. I've had it hooked up too a 4k monitor + 240hz 1080p monitor and not a lick of delay. Performance Testing: I did Geekbench 6 testing and CrystalDiskMark CPU: Single Core - 1976, Multicore - 7,877 GPU: 14,415 Storage: Sequential Read - 3564MB/s Write - 2677 Mbs These are really solid numbers, the Ryzen chip inside really trading blow with some desktop chips here which is impressive for something of this size. Real World Use: Office/Productivity: I spent the week using this for actual work, documents, spreadsheets, jira multiple tabs, video calls. Never felt sluggish, never had to wait for anything. Coding: VS code, running local dev enviroments, docker containers, all handled without complaint. Compilation times are respectable for the form factor. Media: 4K Youtube and local video playback, is entirely smooth no dropped frames, no stuttering Gaming: Heres where I was geniunely shocked, fired up genshin impact set up everything to high, and maintained a solid 60fps throughout. The 680m punches well above its weight. If you needed some triple A backup power, there is also the OCUlink option, being able to connect an external GPU is a huge dub for an already winning machine. Thermals & Noise: Under normal use its near silent, pushing it with benchmarks and gaming and the fan spins up but its not obnoxious just a gentle whoosh noise and the thermals stayed well controlled in my testing/use. Whos this for? Anyone wanting a proper desktop experience without the bulk. Home Office users, media centre builds, light gaming setups or if oyu just want to reclaim desk space tbh. Verdict: This is my second GMKTec device and they've nailed it again (I have the GMKPlus n150 which you'll see in my rack) excellent build quality, clean software, performance that surprises for its size, dual 2.5gbe ports make it interesting for network/homelab as well as the expandability via OCUlink. Highly recommended. Threw in some genshin footage on high, so you can see how it looks, and a quick mouse spin to show the lack of frame drop

### ⭐⭐⭐⭐⭐ Great second mini PC from GMKTec
*by S***E on 19 February 2026*

Great mini PC. Bought this to replace general home working PC after purchasing the K11 for my son (which is fantastic). No issues so far. Easy setup.

### ⭐⭐⭐⭐⭐ Even in death I Serve The Omnissiah
*by E***L on 30 January 2026*

In the times of our word falling apart, the computer components apocalypse, the shortages and the extortionate prices whatever is left in the shelf, I have seen this PC witch is half size of xbox 360 but oh... this boi, the force is stong with one... Best intuitive decision in the moment of critical decision making time I have ever made. For the tech savvy I dont have to explain you the performance, but I can tell you you get every penny worth if it comes to good old formula (performance per price) If there is anything left good from AAA gaming yeah just throw at it it will fly through it. If you want locally running LLMs well just throw at it, it is surprisingly good! It is just overall great design and performance machine with surprisingly good quality, this is pure example that the old theory of cheap Chinese goods is dead. This is premium device but dont be fooled itvis fragile and you need to give some love if you want it last it long. My suggestion if you already spend so mutch dont be stingy buy highest grade thermal putty and phsechange thermal pad. Apply it it will work cool and quiet during heavy loads 75c max. Another advice throw out this mediatek horrible wifi module and get yourself good old intel wifi6 for £20 install it belive me it is an upgrade. Now one warning be careful with the board it is fragile. The pc have only one board and this is all thats your 2k there. when I was disassembing this PC my hands was shaking like a "B" disposer be really careful what you doing do bot rush, Australian painter did rush and did not work out for him to good. Right I see you on the battlefield brothers :D

## Frequently Bought Together

- GMKtec Mini PC Intel N150(Turbo 3.6GHz) 12GB DDR5 256GB SSD Dual LAN, Desktop Mini Computer 4K Triple Display, WiFi6, BT5.2, Energy Efficient
- Logitech MK270 Wireless Keyboard and Mouse Combo for Windows, 2.4 GHz, 8 Multimedia Keys, PC, Laptop, Wireless Keyboard Compact Mouse Combo - Black
- Logitech K400 Plus Wireless Touch TV Keyboard With Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-connected TV, Windows, Android, ChromeOS, Laptop, Tablet - Black

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-11*