Realtek distorted sound

Hey there.
Today I got a new motherboard which has Realtek HD Audio drivers (Gigabte 970A-DS3P to be exact) and whenever I turn up the volume to 100, I get kinda distorted sound when testing default format (those annoying bells when testing left and right channel). It works fine with 50, but anything above proves crackling, fuzzy and distorted audio. The more I turn it up from 50 the more it gets distorted. That only happens when I plug my headphones in the rear audio jack. When I plug them in the front jack the audio is perfectly clear even on high volume. I should also mention that I don't think I completely uninstalled VIA HD Audio drivers from my previous motherboard as I see them in the control panel (although I cannot launch the audio control panel anymore). What can cause this and how do I fix it, using my front panel isn't really an option since my headphones cord is pretty short.
Thanks in advance!

First I would uninstall the VIA audio drivers. https://support.microsoft.com/en-us/mats/program_install_and_uninstall

It seems that I have uninstalled them but there is still an icon for VIA audio control panel in my control panel for which when I run it says "Application not found". It still sounds distorted when testing.

EDIT: Audio seems to be noticeably louder when plugging it in the front panel.

Headphones have a different Impedance than Speakers, thus there can be a difference in volume level between the rear Speaker jack and the front panel Headphone jack, that is designed for Headphones. Although the Speaker jack can be used for headphones, the volume level is usually different than the front panel connection.

You can get a headphone extension cable.

The Via may still be there but its not interfering if there is no Via hardware.

Also, go to Control Panel >Sounds and check the settings (properties) for your sound device. Look at the Advanced Tab and see if the setup there is "best" for your application (such as default format being set to 16 bit, 44100Hz or change to higher quality).

That didn't fix it either :S

Anyone?

I really don't see it as a problem. As you reported, the headset works fine in the front panel "headphone" jack. Just on the rear "Speaker" jack. Headphones work in speaker jacks but as they have a different impedance (load resistance) than a speaker system there can be a difference in volume level.

Its a hardware design so your only recourse is to contact Gigabyte (or return the motherboard if its returnable for a different brand).