Both devices show up properly in device manager and both show their respective connections under 'Audio Inputs and Outputs' in device manager. It has onboard sound as well as an AMD RX550 with AMD High Definition Audio (which is what I actually use, as it is connected to an A/V receiver via HDMI). This computer is a Dell OptiPlex 980 that I use as a home theater PC. If I open up the sound settings, under 'Choose your output device' it does not list any. After the reboot my computer has a red X on the sound and says 'No audio output device is installed'.
My Windows 10 computer running version 1903 automatically installed a.