X86 Hardware issues (Graphics, WiFi, Onboard Sound, external DACs, Disks, BIOS/UEFI Boot problems etc.)

Hi

I installed the above card into a PC and booted Volumio for x86. Under Output CMedia appeared as a option (which was not there before I installed the card) , which I selected. I then made a toslink connection to the dac.

Sadly no signal is received.

Any tips?