Audio game pc to stream pc

Hello guys, I can't find the answer anywhere, tried several things to get the audio from my game pc to my streaming pc using the Ripsaw HD. I use my headset and mic on my gaming pc, but I can't get it done to get the Game audio and my mic through Ripsaw to the streaming pc. I am using OBS Studio. I tried using the mic and headphones input on the Ripsaw HD, then I get sound to the streaming PC, but my volume on my game pc is very very low and I can't use my mic. Any one got the solution for me? Thanks in advance, Regards Timo