UGREEN CM556 25157 USB-C to DisplayPort 1.4 Cable 1M – 8K@60Hz, 4K@240Hz, 32.4Gbps, HDR, DSC, VRR & HDCP 2.3

Description

The UGREEN CM556 25157 is a 1-meter USB-C-to-DisplayPort cable designed to connect a USB-C, Thunderbolt 3, or Thunderbolt 4 source device directly to a monitor or projector with a full-size DisplayPort input.

With a DisplayPort 1.4 HBR3 link rate up to 32.4Gbps, it supports resolutions up to 8K at 60Hz, 4K at 240Hz, and 1440p at 240Hz when used with compatible source hardware and displays.

Support for HDR, Display Stream Compression, HDCP, VRR, AMD FreeSync, NVIDIA G-SYNC, and digital audio makes it suitable for high-resolution creative work, office productivity, and high-refresh-rate gaming.

This is a unidirectional cable: USB-C source → DisplayPort display only.

Key Features

• USB-C Male to DisplayPort Male
• DisplayPort 1.4 / HBR3
• Up to 32.4Gbps raw link rate
• Supports 8K at 60Hz
• Supports 4K at 240Hz
• Supports 4K at 144Hz and 120Hz
• Supports 1440p at 240Hz
• Supports 1080p high-refresh modes
• HDR and HDR10 support
• Display Stream Compression support
• HDCP support
• VRR – Variable Refresh Rate
• AMD FreeSync support
• NVIDIA G-SYNC support
• MST transport support
• Mirror and extended display modes
• MacBook clamshell-mode compatibility
• Samsung DeX support
• Digital video and audio transmission
• Thunderbolt 3 and Thunderbolt 4 compatible
• Aluminum-alloy connector housings
• Tinned-copper conductors
• Triple-layer signal shielding
• Nylon-braided cable jacket
• Length: 1M / 3.3ft
• Color: Gray
• Model: CM556
• SKU: 25157
• EAN: 6941876221578

8K@60Hz and 4K@240Hz

The UGREEN 25157 supports high-resolution and high-refresh-rate DisplayPort video modes with suitable equipment.

*The available resolution, refresh rate, HDR format, color depth, and chroma configuration depend on the source device, GPU, USB-C video capabilities, operating system, DisplayPort monitor, and DSC support.

USB-C DisplayPort Alt Mode Requirement

The USB-C port on the source device must support video output through one of the following:

• DisplayPort Alternate Mode
• Thunderbolt 3
• Thunderbolt 4
• USB4 with compatible display output

A USB-C connector alone does not guarantee video support. Charging-only and ordinary data-only USB-C ports will not work with this cable.

Look for a DisplayPort, Thunderbolt, or video-output symbol near the USB-C port, or check the device manufacturer’s specifications.

Unidirectional Signal Transmission

The cable operates in one direction:

• Connect USB-C to the computer, tablet, or smartphone.
• Connect DisplayPort to the monitor or projector.

It cannot be used to:

• Connect a DisplayPort computer to a USB-C monitor
• Connect a DisplayPort graphics card to a USB-C display
• Convert DisplayPort output into USB-C video input
• Charge a laptop through the DisplayPort connector

32.4Gbps DisplayPort 1.4 Bandwidth

DisplayPort 1.4 HBR3 provides a raw link rate up to 32.4Gbps, supporting demanding video configurations when the connected hardware is compatible.

Suitable applications include:

• 8K desktop displays
• 4K high-refresh gaming
• Professional video editing
• High-resolution photo editing
• CAD and engineering applications
• Large office workspaces
• High-refresh esports monitors
• MacBook-to-DisplayPort monitor connections

The 32.4Gbps rating describes the DisplayPort link. It is not a USB file-transfer speed.

Display Stream Compression

DSC enables compatible equipment to carry high-resolution and high-refresh-rate video within the DisplayPort 1.4 bandwidth limit.

DSC may be required for:

• 8K@60Hz
• 4K@240Hz
• Certain 4K@144Hz HDR modes
• High color-depth configurations
• High-resolution RGB or 4:4:4 video

Both the source GPU and monitor must support DSC for modes that require it.

HDR Support

The cable supports compatible HDR and HDR10 video signals, providing enhanced:

• Contrast
• Brightness
• Color depth
• Highlight detail
• Shadow detail
• Overall image realism

HDR requires compatible source hardware, content, operating-system settings, graphics drivers, and a suitable HDR monitor.

VRR, FreeSync and G-SYNC

The UGREEN 25157 is listed for compatible adaptive-refresh technologies, including:

• VRR
• AMD FreeSync
• NVIDIA G-SYNC

These technologies can synchronize the monitor’s refresh rate with the GPU’s frame output, helping reduce screen tearing and stuttering.

Support depends on the graphics hardware, monitor, driver, operating system, and connection settings. A cable cannot add adaptive-sync capability to unsupported equipment.

Digital Audio Transmission

DisplayPort carries compatible digital video and audio through the same connection.

Supported audio can include:

• Stereo audio
• Multichannel digital audio
• Dolby Atmos passthrough
• DTS audio passthrough

The monitor, sound system, source device, and operating-system audio settings determine the available format.

Mirror and Extended Display Modes

The cable supports standard computer display configurations.

Mirror mode

Shows the same image on the source device and DisplayPort monitor.

Extended mode

Uses the external monitor as an additional desktop workspace.

Clamshell mode

Compatible MacBook models can operate with the lid closed when the required external keyboard, mouse, display, and power conditions are met.

Samsung DeX

Compatible Samsung Galaxy devices can use the external DisplayPort display for a desktop-style interface.

MST and Multiple Displays

The cable can carry MST-compatible DisplayPort signals from supported Windows hardware.

Multiple independent displays require:

• A source that supports DisplayPort MST
• A compatible MST hub or daisy-chain monitor
• Sufficient graphics and link bandwidth
• Appropriate operating-system support

macOS generally does not provide independent extended displays through DisplayPort MST; connected MST displays may mirror instead. The number of displays supported by Apple silicon also varies by Mac model.

Construction

The UGREEN 25157 features:

• Aluminum-alloy connector housings
• Nylon-braided outer jacket
• Tinned-copper conductors
• Triple-layer signal shielding
• Reinforced connector joints

This construction provides resistance to everyday abrasion, bending, and external signal interference.

Specifications

MacBook and Mac Compatibility

Suitable USB-C or Thunderbolt-equipped models can include:

• MacBook Pro
• MacBook Air
• Mac mini
• iMac
• Mac Studio

Maximum display performance varies considerably between models. For example, compatibility with the cable does not mean every Mac can output 8K@60Hz or 4K@240Hz.

Check the exact Mac model’s external-display specifications before selecting a monitor mode.

iPad and iPhone Compatibility

Compatible USB-C-equipped devices can include:

• iPad Pro
• iPad Air
• iPad mini
• USB-C iPhone models

The available display layout and resolution depend on the device. Some iPads support extended displays through Stage Manager, while others may provide only screen mirroring or application-specific video output.

Windows Compatibility

Suitable devices can include:

• Dell XPS 15
• Dell Latitude
• HP Spectre
• HP EliteBook
• Lenovo ThinkPad
• Microsoft Surface models with video-capable USB-C
• ASUS laptops
• Acer laptops
• Gaming laptops
• USB-C-equipped desktop computers
• Compatible handheld gaming PCs

The USB-C port must support DisplayPort Alt Mode or Thunderbolt video output.

Samsung Galaxy Compatibility

Compatible Galaxy devices with USB-C video output can connect to a DisplayPort monitor and may support Samsung DeX.

Not every Galaxy phone or tablet supports wired video output. Verify the exact device model before purchase.

What This Cable Does Not Do

• It does not work from DisplayPort source to USB-C display.
• It does not add video output to a charge-only USB-C port.
• It does not charge the connected laptop, tablet, or phone.
• It does not provide general USB data transfer.
• It does not connect directly to an HDMI-only display.
• It does not split one signal into several independent displays.
• It does not guarantee 8K@60Hz or 4K@240Hz on every compatible-looking device.
• It does not overcome the external-display limits of a Mac, tablet, or smartphone.

Installation

1. Connect the USB-C plug to the source device.
2. Connect the DisplayPort plug to the monitor.
3. Select the DisplayPort input on the monitor.
4. Open the source device’s display settings.
5. Select mirror or extended mode.
6. Choose a resolution and refresh rate supported by both devices.
7. Enable HDR or adaptive sync if required.

A direct connection is recommended. Docks, extension cables, KVM switches, adapters, and wall plates can reduce the available resolution or prevent high-refresh modes from working.

Important Notes

To achieve 8K@60Hz or 4K@240Hz, the complete connection must support the selected mode:

Compatible USB-C/Thunderbolt source → UGREEN 25157 → compatible DisplayPort 1.4 monitor

If the required mode is unavailable:

• Confirm that the USB-C port supports DisplayPort Alt Mode.
• Update the graphics driver and operating system.
• Connect directly rather than through a dock.
• Confirm that the monitor’s selected input supports DisplayPort 1.4.
• Enable DisplayPort 1.4, DSC, HDR, or adaptive sync in the monitor menu.
• Test a lower refresh rate or resolution.
• Verify the source device’s documented external-display limits.

Best For

• MacBook-to-DisplayPort monitor connections
• Windows laptops with USB-C video output
• 8K monitors
• 4K high-refresh gaming monitors
• 1440p gaming monitors
• Mac mini and Mac Studio
• iPad external displays
• Samsung DeX
• Creative workstations
• Office extended-display setups

Why Choose the UGREEN 25157?

• Supports resolutions up to 8K@60Hz
• Supports 4K at up to 240Hz
• Provides a DisplayPort 1.4 HBR3 link up to 32.4Gbps
• Supports HDR and DSC
• Supports compatible VRR, FreeSync, and G-SYNC
• Works with Thunderbolt 3 and Thunderbolt 4
• Supports mirror and extended display modes
• Requires no separate adapter or external power
• Durable aluminum and nylon-braided construction
• Compact 1-meter length

About this item

• 8K Displayport Cable: This USB C to Displayport cable support up to 8K@60Hz/30Hz, 4K@240Hz/144Hz/120Hz/60Hz/30Hz, 2K@240Hz/144Hz/120Hz/60Hz, 1080P@240Hz/120Hz/60Hz resolution. With HDR, HDCP2.3, and eARC functions, you can stream video to your monitor, enjoy more realistic photos and videos with more vivid colors and higher contrast.
• Take Your Game to the Next Level: This USB C to DisplayPort 1.4 cable support up to 32.4Gbps bandwidth, which is 50% higher than DP 1.2 cable. This makes it not only helps you transmit higher-definition video signals but also supports FreeSync and G-Sync, which are necessary for games. VRR and ALLM bring you a smoother gaming experience, especially in FPS, 3A masterpieces, and MOBA games.
• Multiple Modes: The USB C to DisplayPort cable supports MST Daisy Chain Mode, Samsung Dex Mode, Macbook Clamshell Mode, Mirror Mode, and Extend Mode. MST Daisy Chain Mode minimizes cable clutter and extends the display range of the host device. Meet all your needs from everyday office use to professional video and photo editing.