Your explanation of how you connect your devices is confusing...nevertheless the point of a dedicated PCIE USB Card is to get it off the dirty noisy bus and power supply of your computer. It runs with a seperate power supply from the computer. You may think you are hearing black noise free USB from your computer. I can assure you that you would not say that if you run your USB from a dedicated card with seperate power supply. Even the basic Paul Pang V2 will easily let you hear the difference!