I too am experiencing these sound issues with my Maximus VI Formula board.
While I am on TeamSpeak 3, other players can hear everything through my soundcard. I use Corsair Vengence 1300 analog headphones.
The issue occurs in the following tested senarios:
- I plug the headphones into the case front outputs
- I plug the headphones into the motherboard outputs
- I have removed the case output connector from the motherboard and tested it from the back too.
I am running the following hardware:
Motherboard model: ASUS Maximus VI Formula
UEFI Version: 0903
CPU: Intel i5 4670K
Memory kit part number (s) and amount in GB: 8GB HyperX Beast
GPU: ASUS GTX770 DCII OC
SSD/HDDs/Optical drives: 256GB Vertex 4, 2x WD RED 1TB
PSU: Corsair HX850
USB Devices (model/version number): Logitech G15, R.A.T.7
CPU Cooler: EK HX360 kit
PC CASE: Corsair 900D
Operating system: Microsoft Activated yes/no? Windows 8, yes.
Drivers Installed (include version): All of the latest ASUS website drivers including Audio driver v6.0.1.7023
Any third Party temp/voltage software installed: CPUID HW Monitor PRO (trial/unlicensed)
System Overclocked (provide details)? 4.4GHz using the overclock option in the bios, not custom settings.
ASUS Maximus VI Formula | Haswell i5 4670K | 8GB Kingston HyperX Beast
ASUS GTX770 DCII | ASUS VG278HE 27" 144Hz | OCZ Vertex 4 | Corsair 900D
Logitech G15 | Mad Catz R.A.T. 7 | Corsair 1300 | EKWB Loop