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Small black HDMI 2.1 dummy plug with gold-plated connector

Boxwave

Boxwave HDMI 2.1 Dummy Plug 4K 120Hz 8K 30Hz Audio Adapter

SKU CH-2YXW-6K8E8

Simulates a virtual display up to 8K at 30 Hz or 4K at 120 Hz for headless GPU operation, mining or remote access

  • TypeAdapters
  • Simulates a virtual display for headless GPU operation
  • Supports 4K resolution at 120Hz refresh rate via HDMI 2.1
  • Enables 8K output at 30Hz for high-resolution tasks
  • Plug-and-play design requires no drivers, software or external power
  • Works with Windows, macOS and Linux on any HDMI graphics card

Headless Display Emulation

The Boxwave HDMI 2.1 Dummy Plug simulates a connected monitor so a graphics card stays active without a physical screen. It suits operators of headless servers, remote desktops, cryptocurrency mining rigs or VR setups that need constant GPU output.

Gold-Plated HDMI 2.1 Interface

A gold-plated connector resists corrosion and maintains signal integrity across repeated insertions. The plug draws power from the port itself, requires no drivers or external supply, and supports hot-swapping for quick reconfiguration.

4K 120Hz and 8K 30Hz Maximum Resolutions

The adapter reports EDID data for resolutions up to 8K at 30 Hz and 4K at 120 Hz, with 1440p and 1080p also at 120 Hz. Your graphics card must support HDMI 2.1 to reach the highest refresh rates.

Highlights

  • Simulates a virtual display for headless GPU operation
  • Supports 4K resolution at 120Hz refresh rate via HDMI 2.1
  • Enables 8K output at 30Hz for high-resolution tasks
  • Plug-and-play design requires no drivers, software or external power
  • Works with Windows, macOS and Linux on any HDMI graphics card

Specifications

TypeAdapters

Questions about this item

What does the HDMI 2.1 interface cap in practice?

The dummy plug supports 4K at 120 Hz and 8K at 30 Hz, provided the graphics card also supports HDMI 2.1. Lower resolutions such as 1440p and 1080p can reach 120 Hz.

What physical port does the adapter need to fit?

It plugs directly into any standard HDMI output on a discrete graphics card or laptop. The gold-plated connector matches a regular HDMI socket.

How is it installed and what step do people miss?

Insert the plug into the HDMI port; no drivers, software or external power are required. The step often missed is confirming the GPU itself supports HDMI 2.1 for 4K 120 Hz operation.

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