1. Product Overview
The GMKtec M6 Ultra is a high-performance mini PC designed for gaming, office, and home use. It features an AMD Ryzen 5 7640HS processor, integrated AMD Radeon 760M graphics, and supports triple 4K displays. Its compact design and robust connectivity options make it suitable for various computing needs.

Image 1.1: Front and rear view of the GMKtec M6 Ultra Mini PC, highlighting its compact form factor and available ports.

Image 1.2: Key features of the GMKtec M6 Ultra Mini PC, detailing its internal components and connectivity.
2. Package Contents
Verify that all items are present in the package:
- GMKtec Nucbox M6 Ultra AMD Ryzen 5 7640HS Mini PC Computer
- Power Supply & Cable
- HDMI Cable
- VESA Mount and Screws
- User Manual

Image 2.1: Contents of the GMKtec M6 Ultra Mini PC package.
3. Setup Guide
3.1 Initial Connection
- Connect your monitor(s) to the Mini PC using the HDMI, DisplayPort, or USB4 ports.
- Connect your keyboard and mouse to the available USB ports.
- Plug the power adapter into the DC IN port on the Mini PC, then connect it to a power outlet.
- Press the power button located on the front of the Mini PC to turn it on.

Image 3.1: Overview of the Mini PC's ports and interfaces.
3.2 Operating System Setup
Upon first boot, the system will guide you through the Windows 11 Pro setup process. Follow the on-screen instructions to configure your language, region, network, and user account. It is recommended to complete the initial setup without immediate Windows updates to ensure a smoother process.
3.3 Storage and Memory Expansion
The GMKtec M6 Ultra supports easy installation and disassembly for upgrading RAM and SSDs. It features dual M.2 2280 PCIe 3.0 SSD slots (with PCIe 4.0 support for expansion up to 8TB) and dual-channel DDR5 SO-DIMM slots (expandable up to 128GB, max 64GB per slot).
- Ensure the Mini PC is powered off and disconnected from the power supply.
- Carefully open the chassis according to the user manual's specific instructions for your model.
- Locate the available M.2 SSD slot or DDR5 SO-DIMM slot.
- Insert the new SSD or RAM module, ensuring it is seated correctly.
- Secure the component if necessary and reassemble the chassis.

Image 3.2: Internal layout showing SSD and RAM upgrade slots.
4. Operating Instructions
4.1 Power Management
- Power On: Press the power button on the front panel.
- Power Off: Use the Windows shutdown option. For a forced shutdown, press and hold the power button for several seconds.
- Sleep Mode: The system can enter sleep mode via Windows settings or by a short press of the power button (if configured).
4.2 Display Configuration
The Mini PC supports up to three simultaneous displays. Connect monitors to the HDMI 2.0, DisplayPort, and USB4 ports. You can configure display settings (resolution, orientation, extended/duplicate desktop) within Windows Display Settings.

Image 4.1: Triple display setup with the Mini PC.
4.3 Network Connectivity
- Wired LAN: Connect an Ethernet cable to one of the two 2.5G RJ45 LAN ports for high-speed wired network access.
- Wi-Fi: The Mini PC is equipped with Wi-Fi 6 for fast, low-latency wireless internet on 2.4G/5G bands. Configure Wi-Fi settings through Windows Network & Internet settings.
- Bluetooth: Bluetooth 5.2 allows for quick connection to wireless peripherals such as headsets, mice, and keyboards. Manage Bluetooth devices in Windows Settings.

Image 4.2: Wi-Fi 6E capabilities for enhanced wireless performance.
4.4 BIOS Access and Performance Modes
To access the BIOS settings, press the designated key (usually DEL or F2) repeatedly during startup. The Mini PC offers three performance modes:
- Silent Mode (35W TDP): Optimized for quiet operation and reduced power consumption.
- Balanced Mode (45W TDP): Provides a balance between performance and noise levels for everyday tasks.
- Performance Mode (50W TDP): Maximizes processing power for demanding applications and gaming.
These modes can typically be adjusted within the BIOS or through system software, if provided.

Image 4.3: Three performance modes for varied usage.
5. Maintenance
5.1 Cleaning
Regularly clean the exterior of the Mini PC with a soft, dry cloth. Ensure ventilation openings are free from dust accumulation to maintain optimal airflow and cooling performance. Avoid using liquid cleaners directly on the device.

Image 5.1: Advanced dual-fan cooling system for optimal performance.
5.2 Component Upgrades
As mentioned in Section 3.3, the Mini PC is designed for easy upgrades of RAM and SSDs. Refer to the detailed instructions in your physical user manual or manufacturer's support resources for specific steps on accessing internal components.
6. Troubleshooting
This section addresses common issues you might encounter with your GMKtec M6 Ultra Mini PC.
- No Power: Ensure the power adapter is securely connected to both the Mini PC and a working power outlet. Test the outlet with another device.
- No Display: Verify that the monitor is powered on and correctly connected to the Mini PC. Try different display cables or ports. Ensure the correct input source is selected on your monitor.
- System Unresponsive: If the system freezes, press and hold the power button for 5-10 seconds to force a shutdown. Wait a few moments, then power it back on.
- Wi-Fi Disconnection After Sleep: If Wi-Fi disconnects or becomes unresponsive after the PC wakes from sleep, try restarting the system. Ensure your Wi-Fi drivers are up to date. You may also check power management settings for the Wi-Fi adapter in Device Manager to prevent it from being turned off to save power.
- Slow Performance: Check for background applications consuming resources. Ensure sufficient free storage space. Consider updating drivers or adjusting performance modes (see Section 4.4).
For persistent issues, consult the official GMKtec support channels.
7. Technical Specifications
| Feature | Specification |
|---|---|
| Processor | AMD Ryzen 5 7640HS (6 Cores, 12 Threads, 4.3 GHz base, up to 5.0 GHz turbo) |
| Graphics Coprocessor | AMD Radeon 760M (2600MHz) |
| RAM | 32GB DDR5 (4800 MHz, SO-DIMM, expandable to 128GB) |
| Hard Drive | 512GB PCIe 3.0 M.2 2280 SSD (Dual Slot, PCIe 4.0 support, Max. 8TB) |
| Operating System | Windows 11 Pro |
| Wireless Connectivity | Wi-Fi 6 (802.11ax), Bluetooth 5.2 |
| LAN | Dual 2.5G RJ45 Ethernet |
| USB Ports | 3x USB 3.2 (Gen2), 1x USB 2.0, 1x USB 4.0 (PD/DP/DATA) |
| Video Output | 1x HDMI 2.0 (4K@60Hz), 1x DisplayPort, 1x USB 4.0 (8K@60Hz) |
| Audio | 1x 3.5mm Audio Jack (HP&MIC) |
| Dimensions | 7.32 x 7.28 x 4.21 inches (Package) |
| Weight | 3.19 pounds (Item) |
8. Warranty and Support
GMKtec offers a 1-year limited warranty for each Mini PC, effective from the date of purchase. This warranty covers defects due to design and workmanship.
For customer support, you can contact GMKtec through the following channels:
- Amazon Support: Log in to your Amazon account, navigate to 'Your Orders', and select 'Ask Product Question' for assistance.
- After-Sales Support: Send an email to the After-Sales Team at support@gmktec.com. 24/7 customer support is available.
GMKtec is committed to providing professional technical support and satisfying service.
9. Video Resources
No official product videos with specified creator type or preview status were provided in the product data. Therefore, no videos could be embedded in this manual.





