Dolby Atmos without the GPU

[Sabkahn]

I was troubleshooting stability issues with my System and it turns out that whenever I enable Dolby Atmos any game regardless of it actually supporting Atmos will crash anywhere between immediately and well over an hour into gameplay. These crashes are either a AMD Driver Timeout or a BSOD with THREAD_STUCK_IN_DEVICE_DRIVER depending of the AMD Driver version. My GPU is a Strix Vega 64 and I have it connected to both a Monitor via Displayport and my A/V Receiver for couch gaming with HDR and Atmos support.

While I´m fine with not using Atmos for the sake of stability and my sanity, I would still prefer it is was working. At the moment my onboard devices (Sound and Intel GPU) are disabled in the BIOS. My Mainboard has a a HDMI Port. Is it somehow possible to use the onboard devices and that HDMI slot as a dedicated, sound only output to send a Atmos Signal to the A/V while connecting the PC directly to the TV? Or is there a Soundcard with an HDMI output available that would allow for this?

[BuzzingBee]

It's possible to use CPU's integrated graphics as your second display and set as default sound, while still using your main GPU connecting directly to TV as main display.