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In today's era that values versatility and convenience, the USB-C interface stands out as a universal connector, enabling seamless connection between laptops and monitors with a single cable for high-resolution video, clear audio, data transfer, and charging, while minimizing cable clutter. DP Alt mode, or DisplayPort Alternate Mode, allows the USB-C interface to transmit DisplayPort (DP) video and audio signals, while simultaneously transmitting data and power. Most laptops' Type-C ports can transmit and carry DisplayPort video signals.
DP Alt Mode, short for DisplayPort Alternate Mode, was introduced in 2014 by the Video Electronics Standards Association (VESA), an organization responsible for developing and promoting display standards. DP Alt Mode requires no additional drivers and uses the native GPU for video transmission. DisplayPort is a digital display interface that enables the transmission of video and audio data from a source device to a display device, supporting high resolution and high refresh rates. DP Alt mode allows DisplayPort (DP) signals to be transmitted through the same connector, enabling video, audio, and data transmission.
DisplayPort signals utilize four SuperSpeed differential pairs within the USB-C interface to transmit DisplayPort data packets in HBR3 (High Bit Rate 3) mode, with each DisplayPort channel operating at 8.1 Gbps. Depending on the number of DP channels used, there are typically two DisplayPort alternative modes: 2-channel mode and 4-channel mode.
This mode uses two HBR DisplayPort lanes and one USB 3.2 lane, supporting either a single 4K UHD display (3840 × 2160 at 60Hz) or dual 2K displays (2560 × 1600 at 60Hz). At the same time, it delivers USB 3.2 Gen 2x1 data speeds of up to 10Gbps. It’s commonly used in USB-C docks to enable both DisplayPort video output and high-speed USB data transfer.
This mode uses all four high-speed differential pairs to provide four HBR DisplayPort lanes, doubling the bandwidth of the two-lane configuration. It supports either dual 4K UHD displays (3840 × 2160 at 60Hz) or up to four 2K displays (2560 × 1600 at 60Hz). However, USB data is limited to USB 2.0 in this mode. It’s commonly used in USB-C and portable monitors, where USB 2.0 is sufficient for peripherals like keyboards, mice, or touch input.
Seamless Video Output:
Using DP alternative mode, you can directly connect the USB-C port to compatible display devices without additional adapters or converters. This eliminates the hassle of dealing with multiple cables and simplifies the process of connecting devices to external monitors or TVs.
High-Quality Video and Audio:
DP Alt Mode leverages DisplayPort technology to deliver high-resolution video and high-quality audio. Whether you're watching movies, gaming, or working on graphics-intensive tasks, it lets you enjoy sharper visuals, richer colors, and immersive sound on a larger screen.
Enhanced Productivity:
DP Alt Mode lets you extend your desktop or mirror your screen to a larger display. It’s especially useful for multitasking, video editing, and graphic design, where extra screen space makes a real difference. With support for multiple monitors via Multi-Stream Transport (MST), you can daisy-chain displays and build a larger workspace with minimal cabling. The ability to connect multiple screens helps boost productivity and keep your workflow smooth.
While USB-C offers a versatile, all-in-one connector, not every USB-C cable supports DP Alt Mode. It requires specific cable design and wiring to carry DisplayPort signals alongside other USB functions. To ensure compatibility, it’s important to choose a USB-C cable that’s explicitly rated for DP Alt Mode. Fully featured cables are rigorously tested to handle the high bandwidth and signal integrity needed for reliable video transmission.
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Our full-featured fiber-optic USB-C cable is engineered through rigorous R&D and extensive testing to deliver outstanding performance.
It supports up to 8K at 60Hz ultra-high-definition video output and 10Gbps high-speed data transmission.
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Full-feature USB-C
