GMKtec K12 Mini PC User Manual

1. Introduction

The GMKtec K12 Mini PC is a high-performance desktop computer designed for various applications, from household use to demanding business and gaming environments. Featuring an AMD Ryzen™ 7 H 255 processor, DDR5 memory, PCIe4.0 SSD support, and advanced connectivity options like WiFi 6E and Dual 2.5G LAN, it offers a powerful and compact computing solution.

2. Package Contents

Before proceeding with the setup, please ensure all items listed below are present in your package:

• Nucbox K12 Mini PC
• Power Adapter
• VESA Mount with Screws
• User Manual (this document)
• HDMI Cable

3. Setup Guide

3.1 Initial Setup

1. Connect Power: Plug the power adapter into the DC IN port on the Mini PC and then into a power outlet.
2. Connect Display: Use the provided HDMI cable or a DisplayPort cable to connect your monitor to the HDMI 2.1 or DP 1.4 port on the Mini PC. The device supports up to 4 screens simultaneously with 8K resolution.
3. Connect Peripherals: Connect your keyboard, mouse, and other USB devices to the available USB ports (USB 3.2 Gen2, USB 2.0, USB 4.0).
4. Network Connection: For a wired connection, plug an Ethernet cable into one of the Dual 2.5G LAN ports. For wireless, ensure your WiFi 6E and Bluetooth 5.2 are enabled on the device and connect to your network/devices.
5. Power On: Press the power button located on the front of the Mini PC.

3.2 VESA Mount Installation

The GMKtec K12 Mini PC can be mounted to the back of a compatible monitor using the included VESA mount and screws. This saves desk space and provides a clean setup.

3.3 Storage and Memory Installation (for NO RAM NO SSD NO OS models)

If you purchased the "NO RAM NO SSD NO OS" option, you must install your own memory module and hard drive, and install/activate the operating system yourself. An activation code is not provided.

The Mini PC features a disassembled design for easy upgrades. It supports:

• SSD: Three M.2 2280 SSD slots (PCIe 4.0), with a maximum capacity of 8TB per slot (total max 24TB).
• RAM: Dual-channel SO-DIMM DDR5 5600MHz slots, with a maximum capacity of 64GB per slot (total max 128GB).

4. Operating Instructions

4.1 Power On/Off

• Power On: Press the power button on the front panel.
• Power Off: Use the operating system's shutdown function. Alternatively, press and hold the power button for 5 seconds to force a shutdown (not recommended for regular use).

4.2 Connectivity Ports

The GMKtec K12 offers a variety of ports for extensive connectivity:

• Front Ports:
  • 2 x USB 3.2 Gen2
  • 1 x USB 2.0
  • 1 x USB 4.0 (PD/DP/Data/charger compatible, Data only)
  • 1 x 3.5mm Audio Jack
  • Power Button
  • CMOS Reset Button
• Rear Ports:
  • 1 x DC IN
  • 1 x HDMI 2.1 (8K@120Hz)
  • 1 x DisplayPort 1.4 (8K@120Hz)
  • 2 x 2.5G LAN (Ethernet)
  • 1 x USB 2.0
  • 1 x OCuLink (PCIe Gen4x4)

Note on OCuLink Port: This interface does not support hot-plugging. Please ensure the computer is powered off before connecting or unplugging any device from the OCuLink port.

4.3 Wireless Connectivity

The Mini PC is equipped with advanced wireless capabilities:

• WiFi 6E: Provides faster and more reliable wireless internet connection.
• Bluetooth 5.2: For connecting wireless peripherals such as keyboards, mice, and headphones.

4.4 Performance Modes

The K12 Mini PC offers three performance modes to balance power consumption, noise, and performance:

• Quiet Mode (35W TDP): Optimized for low noise and power consumption, suitable for light tasks.
• Balanced Mode (54W TDP): A good balance between performance and noise, ideal for everyday use.
• Performance Mode (70W TDP): Maximizes CPU and GPU performance for demanding applications and gaming.

You can switch between these modes using the Fan Color Mode Toggle Button, typically located on the side or front panel (refer to Figure 4.1).

5. Maintenance

5.1 Cleaning

• Regularly clean the exterior of the Mini PC with a soft, dry cloth.
• Use compressed air to clear dust from ventilation openings to ensure optimal airflow and cooling.
• Ensure the device is powered off and unplugged before cleaning.

5.2 Software Updates

• Keep your operating system and drivers updated to ensure stability, security, and optimal performance.
• Check the GMKtec official website for the latest driver updates for your K12 Mini PC.

5.3 Hardware Upgrades

The K12 Mini PC is designed for easy hardware upgrades. Refer to Section 3.3 for detailed instructions on installing RAM and SSDs. Always power off and unplug the device before opening the chassis for any hardware modifications.

6. Troubleshooting

• No Power: Ensure the power adapter is securely connected to both the Mini PC and a working power outlet. Try a different outlet.
• No Display: Check that the HDMI/DisplayPort cable is firmly connected to both the Mini PC and the monitor. Ensure the monitor is powered on and set to the correct input source.
• Performance Issues: Verify that the Mini PC is set to the appropriate performance mode (see Section 4.4). Ensure adequate ventilation and clean any dust from the cooling vents. Close unnecessary background applications.
• Network Connectivity Problems: For wired connections, check the Ethernet cable and router. For wireless, ensure WiFi is enabled and you are connected to the correct network. Restart your router/modem.
• OCuLink Device Not Detected: Remember that the OCuLink port does not support hot-plugging. Ensure the Mini PC is powered off before connecting or disconnecting any OCuLink device.
• Peripheral Not Working: Try connecting the peripheral to a different USB port. Ensure drivers are installed if required by the peripheral.

7. Specifications

8. User Tips

• OS Installation: If you purchased a model without pre-installed RAM, SSD, or OS, remember to install your preferred operating system (e.g., Windows 11 Pro, Linux, Ubuntu) and necessary drivers after hardware installation.
• Performance Optimization: Utilize the three performance modes (Quiet, Balanced, Performance) to match your workload and environment, ensuring optimal balance between power, noise, and speed.
• External GPU: For enhanced graphics performance, consider connecting an external GPU via the OCuLink port, remembering to power off the Mini PC before connecting or disconnecting.
• Multi-Display Setup: Take advantage of the quad-screen support by connecting up to four monitors for increased productivity or immersive gaming.

9. Warranty and Support

GMKtec is committed to providing high-quality products. Your GMKtec K12 Mini PC is a certified original product. For any technical assistance, warranty claims, or support inquiries, please contact GMKtec customer service through their official channels. Keep your purchase receipt as proof of purchase for warranty purposes.

For information regarding product authenticity and security, please refer to the 'Certified Original' and 'Security & Privacy' policies provided by the seller or manufacturer.