GMKtec Gaming Mini PC AMD Ryzen 7 H 255 (Upgraded 8745HS) 32GB DDR5 1TB SSD, Desktop Computer 3XM.2 2280 Expansion, Oculink, Dual NIC 2.5G, HDMI 2.1, USB4 K12
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AI Verdict
This GMKtec mini PC packs an 8-core Ryzen 7 8745HS, 32GB DDR5 5600MHz RAM, and 1TB PCIe 4.0 SSD, making it a compact powerhouse for gaming and demanding tasks.
This mini PC offers a powerful Ryzen 7 8745HS CPU, 32GB DDR5 RAM, and extensive storage expansion, making it a strong contender for users needing a compact workstation or a gaming machine with an eGPU. Its robust connectivity and multi-display support further enhance its utility for demanding tasks.
If you need guaranteed high-end gaming performance, consider a mini PC with a dedicated, discrete GPU or plan to utilize the Oculink port with an external graphics card.
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Pros
- 8-core Ryzen 7 8745HS CPU with Radeon 780M iGPU handles 8K resolution and AV1 decoding.
- 32GB DDR5 5600MHz RAM and 1TB PCIe 4.0 SSD provide fast memory and storage.
- Three M.2 2280 expansion slots allow up to 24TB total storage.
- Oculink port offers PCIe x4 speeds for eGPU setups, outperforming Thunderbolt.
- Dual 2.5GbE NICs, Wi-Fi 6E, and Bluetooth 5.2 ensure robust network connectivity.
- Supports quad-screen 4K/8K output via HDMI 2.1, DisplayPort 1.4, and USB-C.
Cons
- Integrated GPU limits high-end gaming performance compared to dedicated graphics cards.
- The Ryzen 7 H 255 processor is essentially a rebadged Ryzen 7 7840HS, offering minimal performance gains over its predecessor.
- The NucBox K12 is larger and heavier than its predecessor, the K11, and other mini PCs.
- Serviceability is difficult, making upgrades or repairs challenging.
- No integrated speakers.
Dimension Scores
The Ryzen 7 8745HS at 4.9 GHz with Zen 4 and AVX512 is a strong CPU for a mini PC, though it's a rebadged 7840HS.
With 3x M.2 2280 slots for 24TB, Oculink, dual 2.5GbE, USB4, HDMI 2.1, and DP 1.4, it offers exceptional expansion for a mini PC.
Dual cooling fans and 35dB in Quiet Mode are mentioned, but reviews indicate it 'could be quieter' and sustained load performance is key.
Notebookcheck mentions 'good build quality' and a refreshed chassis design, but also notes it's larger and heavier.
Best For
- Running demanding applications like video editing or CAD.
- Multi-display setups with up to four 4K/8K monitors.
- Compact gaming with FSR settings on less demanding titles.
- Home server applications requiring dual 2.5GbE and large storage expansion.
- Users who want to connect an external GPU via Oculink for higher performance.
Not Recommended For
- High-refresh rate 4K gaming on AAA titles without an eGPU.
- Users prioritizing a very small or lightweight mini PC.
- Users who need a completely silent PC for audio work.
Watch Out For
- The Ryzen 7 H 255 CPU is a rebadged Ryzen 7 7840HS, meaning performance is similar to a two-year-old chip and 20-25% slower than Zen 5 Ryzen AI 9 HX 370.
- The NucBox K12 is larger and heavier than its predecessor, which might be a concern for those seeking the smallest form factor.
- Servicing the device is difficult, which could complicate future upgrades or maintenance.
- Despite dual cooling fans, the unit 'could be quieter' according to reviews, even at 35dB in Quiet Mode.
- No integrated speakers, requiring external audio solutions.
Full Specifications
| RAM | DDR5 5600MT/S |
| ASIN | B0FK2GCG3Z |
| Brand | GMKtec |
| Series | K12 |
| CPU Model | AMD Ryzen 7 |
| CPU Speed | 4.9 GHz |
| Processor | 4.9 GHz amd_ryzen_7 |
| Cache Size | 32 GB |
| Hard Drive | 1 TB PCIe 4.0 M.2 2280 SSD Triple Slots Max.24TB |
| Item Weight | 4.71 pounds |
| Memory Speed | 5600 MHz |
| Chipset Brand | AMD |
| Wireless Type | 2.4 GHz Radio Frequency, 5 GHz Radio Frequency, 5.8 GHz Radio Frequency, 802.11ax, Bluetooth |
| Processor Brand | AMD |
| Card Description | Integrated |
| Operating System | 11 PRO |
| Flash Memory Size | 32 GB |
| Item model number | K12 |
| Screen Resolution | 7680×4320 |
| Package Dimensions | 14.02 x 8.74 x 3.7 inches |
| Computer Memory Type | DDR5 RAM |
| Graphics Coprocessor | AMD Radeon 780M 2600 MHz |
| Hard Drive Interface | PCIE x 16 |
| Number of Processors | 8 |
| Max Screen Resolution | 7680×4320 Pixels |
| Graphics Card Ram Size | 32 GB |
| Memory Storage Capacity | 1 TB |
| Number of USB 2.0 Ports | 2 |
| Number of USB 3.0 Ports | 2 |
| Graphics Card Description | Integrated |
| Specific Uses For Product | Everyday Use, Gaming, Video Editing |
| Hard Drive Rotational Speed | 7200 RPM |
| Standing screen display size | 75 Inches |
| Personal computer design type | Mini PC |
What Buyers Say
Professional reviews indicate the GMKtec K12, despite its 'Upgraded 8745HS' processor, performs similarly to the older Ryzen 7 7840HS, making it 20-25% slower than newer Zen 5 chips. While it boasts strong expandability with three M.2 slots and an Oculink port, its larger size and difficult serviceability are noted drawbacks. The dual cooling fans keep temperatures in check, but the unit could be quieter.
“This thing is fast for its size, but don't expect miracles from the 'new' CPU, it's basically last year's model. And yeah, it's bigger than I thought, but at least it has tons of ports and that Oculink is cool for an eGPU.”
Common Praise
- Supports up to three PCIe4 NVMe SSDs.
- Features 2x RJ-45 and 2x 3.5 mm audio jacks.
- RGB LED can be easily turned off.
- Good build quality.
- Potential for external GPU via Oculink.
- High performance for its size.
Common Complaints
- Zen 4 CPU with no integrated NPU.
- No integrated speakers.
- Difficult to service.
- Could be quieter.
- Relatively large compared to other mini PCs.
- Processor is essentially a rebadged older chip.
Ownership Tips
- The 'Fan Mode' button on top cycles through RGB effects and can turn off the RGB lights.
- A Clear CMOS button is included for resetting the BIOS without opening the case.
- The 120W AC adapter is relatively small.
- The processor is effectively a rebadged Ryzen 7 7840HS.
- Performance is reasonable for the price.
Frequently Asked Questions
Can this mini PC handle 4K gaming?
The integrated Radeon 780M can drive 8K displays and play games with FSR settings, but high-refresh rate 4K gaming on demanding AAA titles will likely require an external GPU via the Oculink port.
What operating system does it come with?
It comes pre-installed with Windows 11 Pro.
How much storage can I add?
It has three M.2 2280 expansion slots, each supporting up to 8TB, for a maximum total of 24TB of additional storage.
Does it support multiple monitors?
Yes, it supports up to four displays simultaneously with 4K/8K output via HDMI 2.1, DisplayPort 1.4, and USB Type-C.
What is the Oculink port for?
The Oculink port provides a high-bandwidth PCIe x4 connection for external GPUs (eGPUs), offering better performance and lower lag than Thunderbolt for gaming and content creation.
Is Wi-Fi 6E included?
Yes, it features built-in Wi-Fi 6E and Bluetooth 5.2 for wireless connectivity.
Does it have integrated speakers?
No, the GMKtec K12 does not include integrated speakers.
How quiet is it?
It features dual cooling fans and operates at 35dB in Quiet Mode, though some reviews suggest it could be quieter.
Buying Guide
When considering a mini PC like this, you need to think about what you'll actually use it for. Don't just look at the CPU speed; integrated graphics have limits, and a small form factor means cooling can be a challenge under heavy, sustained loads. Also, check the port selection carefully – do you need specific video outputs or high-speed external storage connections?
Ryzen 7 H 255 (Upgraded 8745HS) Processor
This is the brain of the computer. A higher number and 'H' series usually means more power for demanding tasks like video editing or running multiple programs at once, but be aware that this specific chip is a rebadged older generation, so manage performance expectations.
DDR5 5600MHz RAM
RAM is like your computer's short-term memory. More RAM (32GB here) means you can have lots of browser tabs open, edit large files, or run complex software without slowdowns. DDR5 at 5600MHz is currently a fast standard, helping the CPU and integrated GPU perform better.
Oculink Port
This is a special, high-speed connection, much faster than typical USB ports, specifically designed for connecting external graphics cards (eGPUs). If you want to play demanding games or do heavy graphics work, this port lets you add a powerful desktop GPU to this tiny PC.
Dual NIC 2.5G Ethernet
NIC stands for Network Interface Card. Having two 2.5 Gigabit Ethernet ports means you can connect to your network at speeds 2.5 times faster than standard Gigabit Ethernet. This is useful for home servers, network-attached storage (NAS), or if you have a very fast internet connection and want to dedicate one port to specific traffic.
Alternatives
If you need a mini PC for serious gaming, look for models with a dedicated, discrete graphics card. For basic office tasks and web browsing, a mini PC with a less powerful processor and less RAM will save you money.
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