1. Introduction
This manual provides detailed instructions for the UGREEN CM877 USB C to DisplayPort 1.4 Adapter. This adapter allows you to connect a USB-C enabled device to a DisplayPort display, supporting high-resolution video output up to 8K@60Hz or 4K@240Hz, while simultaneously providing up to 100W Power Delivery (PD) charging to your source device. It is designed for enhanced visual and audio experiences, making it suitable for gaming, professional work, and entertainment.
2. Key Features
- 8K@60Hz USB C to DP & Charge Hub: Supports 8K@60Hz resolution for detailed visuals and charges USB-C source devices. Equipped with USB-C male, DisplayPort female, and USB-C female (for charging) connectors.
- DisplayPort 1.4 Enhanced Transmission: Achieves data speeds up to 32.4Gbps and 240Hz, supporting AMD FreeSync and NVIDIA G-Sync technologies for smooth gaming.
- Integrated 100W PD Fast Charging: An additional Type-C 100W charging port keeps your device powered during use. Note: This port only supplies power to the USB-C source device and cannot provide power to DisplayPort devices.
- Elevated Visual & Audio Experience: Supports up to 8K@60Hz (backward compatible with 4K@240Hz, 2K@360Hz), synchronous audio and video, 3D, HDR, HDCP 2.3, DTS, and Dolby Atmos sound. Features Mirror mode for screen duplication and Extend mode for multi-display setups.
- Universal Compatibility: Compatible with USB-C ports supporting "DP Alt Mode" and Thunderbolt 3 & 4. Works with devices like iPhone 17 Pro Max/17 Pro/Air/17, 16 Pro Max/16 Pro/16 Plus/16, Samsung Galaxy S25 Ultra, Mac Mini M4/M4 Pro, MacBook Pro/Air 2025, iPad Pro/Air 2025, XPS 17, Dell, HP Chromebook, Surface Book, Samsung Tablet S9, Valve Steam Deck, Rog Ally X, and more. Connects to all devices with DP ports, including Nvidia RTX 5090, AMD Radeon RX 7900, Odyssey G8 G9, HDTV, projectors, VR, and AR Headsets.
- Ultra Compact Design: Features a keychain for portability and an aluminum casing for efficient heat dissipation.
Image: UGREEN CM877 adapter demonstrating 8K@60Hz output with gaming technologies.
Image: The ultra-compact design of the UGREEN CM877 adapter, highlighting its portability and premium build.
3. Setup Instructions
Follow these steps to set up your UGREEN CM877 adapter:
- Verify Device Compatibility: Ensure your USB-C source device (laptop, tablet, or phone) supports "DP Alt Mode" or is Thunderbolt 3/4/5 compatible. Refer to your device's specifications or user manual.
- Connect to Source Device: Insert the USB-C male connector of the UGREEN CM877 adapter into the compatible USB-C port on your laptop, tablet, or phone.
- Connect to Display: Connect a DisplayPort cable (not included) from your monitor, HDTV, or projector to the DisplayPort female port on the UGREEN CM877 adapter.
- Optional: Connect Power (for PD Charging): If you require charging for your source device, connect a USB-C charging cable to the USB-C female PD port on the adapter, and then connect the other end to a power source.
- Configure Display Settings: Once connected, your display should automatically detect the signal. If not, adjust display settings on your source device (e.g., extend, mirror, or primary display).
Image: Step-by-step connection guide for the UGREEN CM877 adapter.
Video: Demonstration of connecting a Thunderbolt 4/3 device to a DisplayPort monitor using a converter, similar to the UGREEN CM877 adapter's functionality.
4. Operating Modes
The UGREEN CM877 adapter supports various display modes to suit your needs:
Mirror Mode
Duplicates your source device's screen onto the external DisplayPort display. This mode is ideal for presentations, sharing content with an audience, or simply viewing your device's screen on a larger display.
Extend Mode
Extends your desktop across multiple screens, allowing you to display different content on each. This mode significantly enhances productivity for multitasking, graphic design, or complex data analysis.
Clamshell Mode
For compatible laptops, you can close your laptop lid while connected to an external display and power source to use only the external monitor. This creates a desktop-like experience with your laptop acting as a powerful CPU.
Image: Laptop connected to multiple monitors in Extend Mode for workspace expansion.
5. Compatibility
The UGREEN CM877 adapter is designed for broad compatibility with devices supporting video output over USB-C.
Compatible Input Devices (USB-C with DP Alt Mode / Thunderbolt 3/4/5)
- Laptops: MacBook Pro/Air (2016-2025), Mac Mini M4/M4 Pro, XPS 17, Dell, HP Chromebook, Surface Book, and more.
- Tablets: iPad Pro/Air (2025), Samsung Tablet S9, Surface Pro.
- Phones: iPhone 17 Pro Max/17 Pro/Air/17, 16 Pro Max/16 Pro/16 Plus/16, Samsung Galaxy S25 Ultra, and more.
- Gaming Consoles: Valve Steam Deck, Rog Ally X.
Compatible Output Devices (DisplayPort)
- Monitors: Odyssey G8 G9, and various other DisplayPort-enabled monitors.
- HDTVs, Projectors, VR/AR Headsets.
Incompatible Ports
- USB-C ports that do not support "DP Alt Mode" (DisplayPort Alternate Mode).
- Standard USB-A ports.
- HDMI ports (this adapter is specifically for DisplayPort output).
Image: Universal compatibility overview for the UGREEN CM877 adapter.
6. Technical Specifications
| Feature | Detail |
|---|---|
| Model Number | CM877 |
| Brand | UGREEN |
| Connector Type | USB-C Male to DisplayPort Female + USB-C PD Female |
| Data Transfer Rate | 32.4 Gigabits Per Second (DisplayPort 1.4) |
| Max Resolution | 8K@60Hz (Backward compatible with 4K@240Hz, 2K@360Hz) |
| PD Charging | Up to 100W |
| Supported Technologies | AMD FreeSync, NVIDIA G-Sync, 3D, HDR, HDCP 2.3, DTS, Dolby Atmos |
| Material | Aluminum Casing |
| Dimensions | 14.3 x 8 x 1.2 cm |
| Weight | 20 g |
| First Available | Nov. 3 2025 |
7. Troubleshooting
No Display Signal
- Ensure your USB-C source device supports "DP Alt Mode" or Thunderbolt 3/4/5.
- Verify all cable connections are secure.
- Try a different DisplayPort cable.
- Restart your source device and display.
- Check your display settings on the source device to ensure the correct output is selected (e.g., Mirror, Extend).
Flickering or Unstable Display
- Ensure you are using a high-quality DisplayPort 1.4 cable, especially for 8K or high refresh rate settings.
- Reduce the resolution or refresh rate in your device's display settings to see if stability improves.
- Update graphics drivers on your source device.
No Charging
- Ensure your USB-C power adapter and cable are capable of delivering 100W PD.
- Verify the charging cable is connected to the correct USB-C PD port on the adapter.
- Confirm your source device supports USB-C Power Delivery.
Overheating
The adapter features an aluminum casing for heat dissipation. If the adapter feels excessively hot, ensure it has adequate ventilation and is not covered.
8. Care and Maintenance
- Keep the adapter clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the adapter to extreme temperatures or humidity.
- Do not attempt to disassemble or repair the adapter yourself.
- Store the adapter in a safe place when not in use to prevent damage.
9. Warranty Information
This product is covered by a return policy allowing for refund/replacement within 30 days of purchase. For further warranty details or claims, please contact UGREEN customer support.
10. Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please visit the official UGREEN website or contact their customer service directly.
Official UGREEN Store: UGREEN Store on Amazon.ca
