USB-C vs DisplayPort: Which Cable for 4K 60Hz?
By Plugable #1 in Docking Stations and USB Devices ~ Plugable ... | Published: 2026-10-29
Category: Comparisons
Compare USB-C to DisplayPort and DisplayPort to USB-C cables for 4K 60Hz video. Learn which direction works, when to choose a bidirectional adapter, and key trade-offs.
Quick answer
For most laptops, a USB-C to DisplayPort cable is the right choice. Choose a DisplayPort to USB-C cable only when your video source has a DisplayPort output and your monitor has a USB-C input. A bidirectional adapter covers both directions in one cable.
Direction matters: know your source and display
The biggest confusion with USB-C and DisplayPort is direction. A standard USB-C to DisplayPort cable connects a USB-C laptop to a DisplayPort monitor. A DisplayPort to USB-C cable does the opposite: it connects a DisplayPort source (like a desktop GPU) to a USB-C monitor.
Many cables are one-directional, so buying the wrong one means no signal. A bidirectional cable removes that guesswork because it works in both directions, as long as both devices support the required alternate mode.
4K 60Hz: what the cable must support
For crisp 4K at 60Hz, the cable must handle the bandwidth. DisplayPort 1.2 or higher is typically needed. The Plugable USB-C to DisplayPort Bidirectional Adapter Cable supports 3840x2160@60Hz, so it delivers the performance you expect on a 4K display.
If your cable only supports 4K at 30Hz, you'll notice a less fluid cursor and video. Always check the resolution and refresh rate on the product page before buying.
How to choose the right cable
- USB-C to DisplayPort cable: Use this when your laptop or tablet has a USB-C port that supports DisplayPort Alt Mode and your monitor has a DisplayPort input. This is the most common setup. Check that your USB-C port supports DisplayPort Alt Mode; not all USB-C ports do.
- DisplayPort to USB-C cable: Use this when your video source has a DisplayPort output (like a desktop GPU) and your monitor has a USB-C input. This is less common but useful for newer monitors. Verify your monitor's USB-C input supports video; some USB-C ports are data-only.
- Bidirectional adapter cable: Choose this if you need flexibility to connect either way. It works in both directions, so you can switch between a USB-C laptop and a DisplayPort source without buying two cables. A bidirectional cable is a cost-effective solution if you have multiple devices with different ports.
Product facts
- Plugable USB-C to DisplayPort Bidirectional Adapter Cable: The Plugable USB-C to DisplayPort Bidirectional Adapter Cable is 6 feet long and supports resolutions up to 3840x2160@60Hz (4K) on DisplayPort displays. This cable delivers smooth 4K 60Hz video and works in both directions, so you can connect a USB-C laptop to a DisplayPort monitor or a DisplayPort source to a USB-C display.
Plugable USB-C to DisplayPort Bidirectional Adapter Cable
Who should choose what
Best for
- People with a USB-C laptop and a DisplayPort monitor who want a simple, reliable connection
- Users who need 4K 60Hz video and want a single cable that works in both directions
Not for
- People whose USB-C port does not support DisplayPort Alt Mode (check your device specs)
- People who need to connect to HDMI or DVI monitors; this cable only works with DisplayPort
