Digital audio out problem.

[o3soewr]

I recently bought a DAC and am having trouble getting it working (no sound what-so-ever). 

The setup is wired as follows: Motherboard >[spdif]> DAC >[RCA]> Amplifier >[6.3mm audio]> Headphones.

 

I have tested the headphones, amplifier, DAC and all cables. The problem lies with my PC.

However the PC says it's sending a signal (pic related).

 

MB: GA-Z68X-UD5-B3

DAC: Beresford Bushmaster MKII

Amplifier: 1981 Pioneer SA-620

Headphones: Beyerdynamic DT 770 pro (250 ohm)

Driver: Realtek 6.0.1.7037

OS: Windows 8.1 64bit

Bios: GBT - 42302e31 Award Modular BIOS v6.00PG

[o3soewr]

As I suspected it was the driver.
I've managed to getting it working driverless in win 8.1 and driven in win 7.