By default, every dedicated Mac server at MacStadium includes a headless HDMI adapter to enable GPU acceleration in macOS. This small accessory causes the operating system to believe that a display is attached, therefore making the GPU work harder to provide a smooth remote desktop experience.
It’s easy to confirm that the GPU adapter is attached and working correctly.
If you’re using the Scaled resolution settings, you should have options for up to 1080p on your remote desktop.
If you see something other than fit Headless (or suspect it’s not working as expected), please open a remote hands support ticket so your local data center technicians can review and/or replace the existing GPU adapter.