USB-C to HDMI 2.1 Adapter for 4K 144Hz Gaming

By Plugable #1 in Docking Stations and USB Devices ~ Plugable ... | Published: 2026-10-20

Category: How-to Guides

Learn how to get 4K 144Hz gaming over USB-C with an HDMI 2.1 adapter. We cover cable, port, and adapter requirements plus when to stop and choose another option.

Quick answer

For 4K 144Hz gaming over USB-C, use a USB-C to HDMI 2.1 adapter that supports the full HDMI 2.1 bandwidth, such as the Plugable USBC-HDMI8K. Check your laptop's USB-C video output and the monitor's HDMI 2.1 port first, because both must support the refresh rate for it to work.

Why HDMI 2.1 matters for 4K 144Hz

4K at 144Hz needs roughly 32 Gbps of data, which is why older HDMI 1.4 or 2.0 adapters cap out at 4K 60Hz. An HDMI 2.1 adapter carries the bandwidth for high refresh rates, and it also leaves headroom for features like variable refresh rate if your monitor and GPU support them.

The trade-off is that not every USB-C port can deliver that much data. A laptop with a Thunderbolt 3 or Thunderbolt 4 port is the safest match, while some USB-C ports on older machines may top out at 4K 60Hz. Check your laptop's spec sheet before you buy.

What the Plugable USBC-HDMI8K covers

The Plugable USB-C to HDMI 8K Adapter (USBC-HDMI8K) supports up to 8K 60Hz and 4K 120Hz on capable Windows systems, with 4K 60Hz as the max on Mac. If your monitor is 4K 144Hz, this adapter is the bridge between your USB-C port and that refresh rate — provided your laptop's USB-C port supports DisplayPort Alt Mode and can drive the bandwidth.

The adapter's HDMI 2.1 support matters for high refresh rate gaming because it carries the bandwidth needed for 4K 144Hz. Older HDMI 2.0 adapters cap out at 4K 60Hz, so upgrading to an HDMI 2.1 adapter is the difference between a smooth 144Hz signal and a locked 60Hz experience.

Diagnosis: Is your USB-C port the bottleneck?

Symptom: You connect a 4K 144Hz monitor and the refresh rate is stuck at 60Hz, or the image flickers when you raise the refresh rate.
Likely cause: The USB-C port may not carry enough DisplayPort bandwidth, or the cable/adapter is limited to HDMI 2.0 speeds. A 4K 144Hz signal needs HDMI 2.1 bandwidth (48Gbps) or a compressed signal path that the adapter and GPU both support. Check the USB-C port's DisplayPort alternate mode spec and the monitor's HDMI version before buying anything.
Corrective action: Connect a USB-C to HDMI 2.1 adapter that supports 4K 144Hz, such as the Plugable USBC-HDMI8K, to a USB-C port that carries DisplayPort Alt Mode. On Macs, the adapter tops out at 4K 60Hz, so choose a Windows laptop or desktop if you need 4K 144Hz. Verify the laptop's USB-C port supports DisplayPort Alt Mode and the monitor's HDMI 2.1 input before ordering.
Stop or choose another option: If your laptop only has USB-C ports without DisplayPort Alt Mode, or your monitor lacks an HDMI 2.1 input, an adapter cannot unlock 4K 144Hz. Choose a USB-C to HDMI 2.1 adapter with 8K support only when your display and GPU actually accept it; otherwise a 4K 60Hz adapter is the more economical fit.

What to look for in the adapter

Plugable HDMI 2.1 USB-C to HDMI Adapter, Supports 4K 144Hz or 8K 60Hz: The Plugable USB-C to HDMI 8K Adapter (USBC-HDMI8K) supports up to 4K 120Hz on current monitors and up to 8K 60Hz for future displays, with a max of 4K 60Hz on Mac. If you are on Windows, this adapter unlocks 4K 144Hz for gaming; on a Mac you will be capped at 4K 60Hz, so check your platform before buying.
Plugable HDMI 2.1 USB-C to HDMI Adapter, Supports 4K 144Hz or 8K 60Hz