Coil Whine/feedback

[TheCAD]

I just finished a build and I'm definitely getting coil whine.

The coil whine is very noticeable at 120+ FPS and even bothersome at 60 FPS in game(csgo). If I switch to a different screen in lobby of csgo its real bad for a few seconds then settles down.
I can also hear a faint noise some times when I use the mouse scroll wheel. Which doesn't bother me, but makes me wonder if the onboard sound is picking up the coil whine more than it should be.

Setup:

i5 4590
Gigabyte z97x Sli
MSI r9 270 OC
8gb ddr3 1600
xfx 550w P1550SXXB9
mx100 256gb

Using Sennheiser HD555s

Will a discrete sound card likely fix this?

 

[TESLA]

Maybe, even discrete cards sometimes have issues depending on their placement in the case and shielding (but most reputable ones should not).

Are you using any form of front audio jacks or are you connected directly into the IO panel in the back?

 

[TheCAD]

Maybe, even discrete cards sometimes have issues depending on their placement in the case and shielding (but most reputable ones should not).

Are you using any form of front audio jacks or are you connected directly into the IO panel in the back?

Connected directly in the back. I'm gonna try a sound blaster z tomorrow.

Hopefully that fixes it.

The coil whine isn't even really that loud, just seems like the onboard sound is picking up interference a lot.