I would say that the with the Auto setting the bios disabled the onboard when it detected the audio chip on the video card.
Also DVI and HDMI are identical spec-wise, only differences are the cable/connectors and HDMI can carry audio.
My Computer
At a glance
Win 7 Ultimate x64FX-8350 @ 4.6 GHz so farADATA XPG V1 Series Black 8GB DDR3 1600Sapphire R9 270x Dual-X
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Me
- OS
- Win 7 Ultimate x64
- CPU
- FX-8350 @ 4.6 GHz so far
- Motherboard
- Asus M5A97 EVO
- Memory
- ADATA XPG V1 Series Black 8GB DDR3 1600
- Graphics Card(s)
- Sapphire R9 270x Dual-X
- Sound Card
- Xonar DGX w/ Corsair Vengence 1300
- Monitor(s) Displays
- Acer S232HL Abid
- Screen Resolution
- 1920x1080
- Hard Drives
- 120 GB OCZ Vertex 3
500 GB Seagate 7200.12
- PSU
- Antec Earthwatts 650W Green
- Case
- Antec Three Hundred
- Cooling
- Cooler Master 212 EVO
- Keyboard
- Logitech G510
- Mouse
- Logitech G500s
- Internet Speed
- 35000/3000
