ATH-M20X Headphones making buzzing noise

[OptimusPrimusShrek]

I purchased a pair of ATH-m20x headphones and when I am not playing any audio through my headphones there is buzzing sound/ humming sound, and in select video games the buzzing noise can vary from barely being heard to very prominent and noticeable. I have an on-board sound card as well.
EDIT: I suspect a poorly isolated motherboard as being the issue.
Thanks for the help!

My Specs:
Case: Thermaltake Level 10 GTS
CPU: Intel® Core™ i5-4690K 3.5 GHz
GPU: EVGA NVIDIA GeForce GTX 770 2GB
OS: Microsoft® Windows 7 Home Premium (64-bit Edition)
PSU: 600 Watts
MOBO: GIGABYTE Z97-D3H ATX w/ Realtek GbLAN, 2 PCIe x16, 2 PCIe x1, 3 PCI, 6x SATA 6Gb/s
RAM: 8GB (4GBx2) DDR3/1866MHz Dual Channel Memory (Corsair Vengeance)
HDD: 1TB Western Digital Caviar Black SATA-III 6.0Gb/s 7200 rpm

 

[holyprof]

The humming is caused by EMI (https://en.wikipedia.org/wiki/Electromagnetic_interference). On some computers i've worked on, the buzzing/humming is tied to hard disk activity, on others comes from GPU activity (becomes stronger when playing games) or from bad ripple suppression in the power supply. On my work, there's a PC that produces humming noise from the loudspeakers when i scroll a webpage.

Possible solutions:

1) external USB soundcard (not very expensive and easy to install). I use this one and i'm very satisfied:
http://www.asus.com/uk/Sound_Cards/Xonar_U3/

2) dedicated sound card with auxiliary power connector. I have this one on my old PC and it's great:
http://www.asus.com/uk/Sound_Cards/Xonar_DX/

3) if a friend can loan you a high-quality power supply to test, place it in your PC an see if the noise is reduced, disappear or stays the same.

4) remove the GPU and try using the intergrated GPU to exclude the graphics card as the source of the problem.

Let us know if anything of those worked.

 

[OptimusPrimusShrek]

The humming is caused by EMI (https://en.wikipedia.org/wiki/Electromagnetic_interference). On some computers i've worked on, the buzzing/humming is tied to hard disk activity, on others comes from GPU activity (becomes stronger when playing games) or from bad ripple suppression in the power supply. On my work, there's a PC that produces humming noise from the loudspeakers when i scroll a webpage.

Possible solutions:

1) external USB soundcard (not very expensive and easy to install). I use this one and i'm very satisfied:
http://www.asus.com/uk/Sound_Cards/Xonar_U3/

2) dedicated sound card with auxiliary power connector. I have this one on my old PC and it's great:
http://www.asus.com/uk/Sound_Cards/Xonar_DX/

3) if a friend can loan you a high-quality power supply to test, place it in your PC an see if the noise is reduced, disappear or stays the same.

4) remove the GPU and try using the intergrated GPU to exclude the graphics card as the source of the problem.

Let us know if anything of those worked.

Thank you! I will be getting a USB soundcard