no sound from jack

Whenever i plug my headphone, or any headphone, to my tower's aux in port, both the front and the rear aux in ports, the sound is very low, however if I use a headphone with the USB flash port, sound is perfect. My motherboard is b450 tomahawk, any problem with my motherboard?

It was a normal day after school, I turned on the PC and wanted to play GTA and Minecraft. I turned on the game when I noticed that I didn't hear anything. the only thing is the snarling wraith prism of the RGB cooler. I use pioneer speakers that I have connected to my PC via a normal jack. I...