GMKtec K12 Mini PC User Manual

1. Introduction

Friendly Reminder

Thank you for choosing GMKtec. Please read this user manual carefully and save it for future reference. The information contained in this document is subject to change without further notice. Nothing in this document should be construed as creating any additional warranty. GMKtec shall not be liable for technical or editorial errors or omissions that may appear in this document.

About the Device

Before use, please familiarize yourself with the interface and buttons of the device.

Figure 1: Front and Rear Ports Overview

Front Ports: Power button, Reset button, 2x USB 3.2 (Gen2), 1x USB 2.0, 1x Type-C (PD/DP/Data), 1x 3.5mm Combo Audio Jack.

Rear Ports: 1x DC IN (19V-6.32A), 1x HDMI 2.1 (8K@120HZ), 1x DP1.4 (8K@120HZ), 1x USB 4.0, 1x OCulink (PCIe Gen4x4), 2x USB 3.2 (Gen2), 2x 2.5G LAN (RJ45), 1x Computer Lock slot, 1x 3.5mm Combo Audio Jack.

FAN-MODE: Adjustable system fan color light effect. Short press this key to switch between 13 modes. Long press to turn off the light, short press again to turn on the light.

Note: If you are using a wireless mouse or keyboard, a wireless dongle (typically included with your mouse and keyboard set) is required for the initial Microsoft account setup. Once the setup is complete, you can enable Bluetooth and Wi-Fi to connect additional wireless devices.

If there are any problems during the use, please contact us via the email address in the user manual, we are always here to support you.

2. Package Contents

Please check the box for the following items:

Figure 2: Package Contents

• 1x Nucbox K12 Mini PC
• 1x Power Adapter (DC IN: 19V-6.32A 120W)
• 1x AC Power Cord
• 1x VESA Mount with Screws
• 1x HDMI Cable
• 1x User Manual / Warranty Card

3. Setup Instructions

Connection Steps

1. Please use the power adapter that comes with this product.
2. Connect the monitor with the HDMI cable, please make sure that the HDMI cable is qualified.
3. Connect the keyboard and mouse.
4. During the first system startup, please follow the Windows startup guide. During this process, remember not to disconnect the power supply. It will take about ten minutes for the first startup to enter the user desktop, please wait patiently.
5. Before the system startup process, please turn off WiFi and LAN and select the "skip option" to prevent being unable to skip registration and log in to your personal account after connecting to the internet.

Important Notice for Buyers (RAM/SSD/OS Options)

Figure 3: RAM, SSD, and OS Configuration Options

• Option: NO RAM NO SSD NO OS
  • This version does not include memory modules or a hard drive.
  • You will need to purchase and install your own RAM and SSD.
  • You must install and activate the operating system by yourself. (Activation code is not provided).
• Options with RAM & SSD
  • These versions come with pre-installed Windows 11 Pro.
  • The system is already activated and ready to use out of the box.

4. Operating Modes and Basic Settings

How to Enter the BIOS Settings Page

1. In the shutdown state, press the power button. The button light will turn on.
2. Continuously click the ESC key on the keyboard until the system BIOS interface (Aptio Setup AMI interface) appears on the screen.

How to Modify Boot Options

1. Insert the storage device that needs to be started (e.g., a USB flash drive or solid-state drive) into the host.
2. Temporary modification: In the shutdown state, press the power button. The button light will turn on. Then, continuously click the F7 key on the keyboard until the device startup option selection interface appears on the screen. Select the desired storage device to start, and then press the Enter key on the keyboard to confirm.
3. Permanent modification: Enter the BIOS settings page. Use the keyboard arrow keys (left/right) to switch to the BOOT interface. Then, use the keyboard arrow keys (up/down) to select the first boot option (Boot Option #1). Press Enter to enter the device selection interface. Select the desired storage device to start, press F10 to save the modifications, and then press Enter on the keyboard to confirm.

How to Modify the CPU Power Consumption Mode

1. Enter the BIOS settings page. Select the Main page on the main interface. Use the keyboard arrow keys (up/down) to select "PowerLimit Setting", and press Enter to enter the desired power consumption mode.
2. There are three modes to choose from:
• Silent mode: The computer achieves optimal system performance at normal acoustic levels.
• Balance mode (default setting): The computer operates at its best with balanced noise and better performance.
• Performance mode: All fans in the computer will run at full speed, with a certain amount of fan noise, providing a better and higher performance work and entertainment experience.

Figure 4: Performance Modes and Specifications

How to Modify the Power On Mode

1. Enter the BIOS settings page. Select the Advanced page on the main interface. Use the keyboard arrow keys (up/down) to select "Auto Power On". Press Enter to enter the option to turn on or off. Press F10 to save the changes, and then press Enter to confirm.

5. Technical Specifications

6. Installation and Upgrades

Easy Installation (RAM and SSD)

The GMKtec K12 Mini PC features a disassembled design, making RAM and SSD upgrades easy and convenient.

Figure 5: Internal Layout for RAM and SSD Installation

• SSD M.2 2280: Triple Storage Slots. Max capacity: 8TB per slot, 24TB total. Supports 1*M.2 2280 PCIe Gen4.0x4 and 2*M.2 2280 PCIe Gen4.0x2.
• DDR5 5600MHz: Dual-channel SO-DIMM x2. Max capacity: 64GB per slot, 128GB total.

7. Connectivity and Interfaces

Rich Interfaces and Excellent Connectivity

The GMKtec K12 is suitable for business, office, gaming, and home use, offering a wide array of ports for versatile connectivity.

Figure 6: Detailed Port Layout

Wireless Connectivity

Equipped with next-generation wireless technology for high speed and stability.

Figure 7: Wi-Fi 6E and Bluetooth 5.2 Performance

• Wi-Fi 6E: Offers significantly faster wireless speeds compared to previous generations.
• Bluetooth 5.2: Provides enhanced connectivity for peripherals and accessories.

Dual 2.5G Ethernet

For ultra-fast, reliable wired network connections.

Figure 8: Dual 2.5G Ethernet Ports

OCulink Port

The OCulink port realizes the innovation of graphics card connection. Note: This interface does not support hot plugging. Please make sure to connect or unplug when the computer is powered off.

Figure 9: OCulink Port for External Graphics Card

8. Cooling System and Performance

Dual Upgraded Cooling Fans

The cooling system's volume is only 1/50 of that of Tower PCs, and the cooling performance is improved by 200%. Equipped with upper and lower dual cooling fans with a copper base, it ensures continuous and stable operation for 72 hours under a 70W TDP environment.

Figure 10: Advanced Cooling System

• Smart system fans
• Surround convection airflow design
• Colorful RGB lighting
• SSD/DDR runs more efficiently

AMD Ryzen™ 7 H 255 Processor

Equipped with the AMD Ryzen™ 7 H 255 processor featuring 8 cores and 16 threads based on the Zen 4 architecture. Base clock: 3.8GHz, Boost up to 4.9GHz, with a peak TDP of 70W.

Figure 11: AMD Ryzen 7 H 255 Processor Details

AMD Radeon™ 780M Graphics Card

AMD Radeon 780M is a powerful integrated graphics card with performance comparable to that of an independent GPU.

Figure 12: AMD Radeon 780M Performance

9. Multi-Display Output

The GMKtec K12 supports up to 4 screens simultaneously with 8K resolution, achieving a stunning visual experience.

Figure 13: Quad Display Setup

Available ports for multi-display:

• 1x USB4.0
• 1x TYPE-C (with DP Alt Mode)
• 1x DP1.4
• 1x HDMI2.1

10. User Tips

• RAM Configuration: When purchasing a 16GB RAM version, it is generally configured as 2x 8GB modules for dual-channel performance. For optimal performance, ensure RAM is installed in dual-channel mode if upgrading.
• Barebones vs. Pre-configured: If you opt for the 'NO RAM NO SSD NO OS' version, remember to factor in the cost and effort of purchasing and installing these components yourself. Windows activation codes are not provided with barebones units.
• Initial Setup: To streamline the initial Windows setup, consider disconnecting from the internet (both Wi-Fi and LAN) and selecting the 'skip option' for registration. This can prevent potential delays or issues with personal account login during the first boot.
• Cooling: The advanced cooling system is designed for sustained performance. Ensure adequate airflow around the device, especially when operating in Performance mode, to maintain optimal temperatures.

11. Safety Warnings and Precautions

Use Environment

• Do not use the device in dusty and humid places to avoid causing internal circuit failures.
• Do not place this equipment near heating objects such as electric heaters.
• The working temperature of this equipment is 0-40 degrees Celsius, and the normal working humidity is 10-90% RH.

Power

• Please use the special charger that comes standard with this product.

Waterproof

• This device is not waterproof, please keep it dry.

Maintenance

• For all maintenance services, please contact the dealer's maintenance personnel.
• Do not insert any sharp objects into the device.
• Do not drop or bump the device to avoid damage to the device.

12. Troubleshooting

If you encounter issues with your GMKtec K12 Mini PC, please refer to the following general troubleshooting steps:

• No Power: Ensure the power adapter is securely connected to both the Mini PC and a working power outlet. Verify the power button is pressed correctly.
• No Display: Check that the HDMI/DP cable is firmly connected to both the Mini PC and the monitor. Try a different cable or monitor if possible. Ensure the monitor is set to the correct input source.
• System Not Booting: If the system does not boot, try accessing the BIOS settings (as described in Section 4) to check boot order or hardware detection. If you installed RAM/SSD yourself, ensure they are correctly seated.
• Peripheral Issues: If a mouse, keyboard, or other USB device is not working, try connecting it to a different USB port. For wireless devices, ensure drivers are installed and Bluetooth/Wi-Fi is enabled.
• Network Connectivity Problems: For wired connections, check the Ethernet cables and router. For Wi-Fi, ensure the Wi-Fi adapter is enabled and connected to the correct network.
• Overheating: Ensure the Mini PC has adequate ventilation and is not placed in an enclosed space. Check that the fan vents are not obstructed.

For persistent issues, please contact GMKtec customer support.

13. Warranty and Support

Warranty Commitment

You are entitled to a 12-month warranty for product quality problems caused by non-human factors. Accessories come with a 6-month warranty.

After Service

• Email Support: support@gmktec.com
• Sales Inquiries: gmk@gmktec.com
• Company: Shenzhen GMK Technology Co., Ltd.
• Address: 4/F, #9 Bldg, Yifenghua Industrial Park, Huaning Rd, Longhua Dist, 518109, Shenzhen, China

Compliance Information

FCC Compliance Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help.

EU Declaration Of Conformity

We, Shenzhen GMK Technology Co. Ltd, Address: 4/F, #9 Bldg, Hualian Industrial Park, XinShi Community, Dalang Street, Longhua District, 518109, Shenzhen, China, declare under our sole responsibility that the product: Model Number: K12 Complies with the following EU Directives:

• Electromagnetic Compatibility Directive (2014/30/EU)
• Low Voltage Directive (LVD) 2014/35/EU
• Restriction of Hazardous Substances (RoHS) Directive (2011/65/EU), (2015/863/EU)
• Radio Equipment Directive (RED) (2014/53/EU)

Harmonized Standards Applied:

1. Low Voltage Directive (LVD) 2014/35/EU
   • EN IEC 62368-1:2020+A11:2020 (Safety of IT/AV equipment)
   • EN IEC 62311:2020 (EMF exposure limits)
2. Electromagnetic Compatibility (EMC) Directive 2014/30/EU
   • EN 55032:2015/A11:2020 (Emissions)
   • EN 55035:2017/A11:2020 (Immunity)
   • EN IEC 61000-3-2:2019/A1:2021 (Harmonics)
   • EN 61000-3-3:2013/A2:2021 (Voltage fluctuations)
3. Radio Equipment Directive (RED) 2014/53/EU
   • EN 300 328 V2.2.2 (2019-07) (2.4 GHz band, e.g., Wi-Fi/Bluetooth)
   • EN 301 893 V2.1.1 (2017-05) (5 GHz band, e.g., Wi-Fi 5/6)
   • EN 301 489-1 V2.2.3 (2019-11) (General EMC for radio equipment)
   • EN 301 489-17 V3.3.1 (2024-09) (2.4/5 GHz specific EMC)
4. Restriction of Hazardous Substances (RoHS) Directive 2011/65/EU
   • IEC 62321 Series (Testing for restricted substances):
   • IEC 62321-3-1:2013 (Lead, mercury, cadmium screening)
   • IEC 62321-5:2013 (Cr and PBB/PBDE)
   • IEC 62321-4:2013+AMD1:2017 CSV (Hg in polymers/electronics)
   • IEC 62321-6:2015 (Phthalates in plastics)
   • IEC 62321-7-1:2015 (Hexavalent chromium)
   • IEC 62321-7-2:2017 (Br/Cl in polymers)
   • IEC 62321-8:2017 (Phthalates in coatings)

This product is marked with the CE symbol to confirm compliance with EU regulations. The aforementioned product meets all essential requirements of the applicable EU directives. The full technical documentation, including test reports and risk assessments, is retained and available for inspection by relevant authorities for 10 years after market placement.

Signed for and on behalf of: Shenzhen GMK Technology Co., Ltd. Compliance Officer 2024-04-17 Shenzhen, China