GMKtec M8 Mini PC Review: Ryzen 5 PRO 6650H with Dual 2.5G and OCuLink
The GMKtec M8 mini PC is not your typical compact desktop. On paper, it looks like another small Ryzen-powered box, but once you look at the ports and internal expansion, it becomes clear this system is aimed at power users, homelab builders, and anyone who needs serious connectivity in a tiny footprint.
Ryzen 5 PRO 6650H Performance
At the heart of the GMKtec M8 is the AMD Ryzen 5 PRO 6650H. This is a 6-core, 12-thread Zen 3+ processor built on a 6nm process. It boosts up to 4.5 GHz and can run up to 40 watts in performance mode.
In real-world use, that means:
Smooth multitasking
Strong performance for virtualization and containers
Plenty of power for Proxmox, Docker, and home server workloads
Comfortable 4K media playback
Light content creation and casual gaming with the Radeon 660M iGPU
This is laptop-class silicon, but configured in a way that makes it feel closer to a low-power desktop experience.
Serious Networking: Dual 2.5G LAN
One of the standout features of the GMKtec M8 is dual 2.5 gig Ethernet. That immediately puts it in homelab territory.
You can use it for:
Router or firewall builds
Network segmentation
High-speed NAS connections
Virtualized network labs
Redundant or bonded connections
With WiFi 6E and Bluetooth 5.2, this system's connectivity is far beyond what most mini PCs offer.
USB4 and OCuLink Expansion
This is where the M8 really separates itself.
You get:
USB4 with up to 40Gbps bandwidth
DisplayPort output through USB4
Power delivery support
OCuLink for direct PCIe Gen4 x4 expansion
OCuLink is rare in this price class. It opens the door to external GPUs or high-speed PCIe storage solutions without the overhead of traditional USB enclosures. Just remember that OCuLink is not hot-plug safe. Always power down before connecting or disconnecting.
For anyone building a compact but expandable system, this is a big deal.
Storage and Memory
The GMKtec M8 ships with:
16GB LPDDR5 6400MT per second memory
512GB or 1TB PCIe NVMe SSD
The RAM is onboard and not upgradeable, so plan accordingly. However, you do get two M.2 2280 PCIe 4.0 slots internally, supporting large NVMe drives. That means you can scale storage significantly for media servers, backups, or VM labs.
This is NVMe only. SATA drives are not supported.
Triple Display and 8K Support
The M8 supports HDMI, DisplayPort, and USB4 video output for triple monitor setups. It even supports up to 8K output.
For most users that translates to:
Clean multi monitor workstations
Digital signage
High resolution media setups
Compact editing or streaming rigs
Who Should Buy the GMKtec M8?
This is not a bargain office mini PC. It is for people who care about I O, networking, and expansion.
It makes the most sense if you:
Run a homelab
Want dual 2.5G networking
Need USB4 for fast external storage
Plan to experiment with OCuLink
Want a compact but capable virtualization host
If you need upgradeable RAM or a rock bottom budget system, this may not be the right fit. But if connectivity and flexibility matter, the GMKtec M8 is a very compelling option.
Final Thoughts
The GMKtec M8 punches above its size. With Ryzen 5 PRO performance, dual 2.5G LAN, USB4, and OCuLink, it offers features that are still rare in the mini PC market.
For homelab enthusiasts and power users, this is one of the more interesting compact systems currently available.
Check current pricing here:
👉 https://amzn.to/4snuw8l