Okay, so on my system i have a sound card, but i'm not entirely sure if it's being used or not. This is the first PC i've built, so If this is a dumb question, I apologize. Do i need to plug my headphones into one of the audio jacks on the back of the sound card to actually get the better sound quality/ use the sound card? Or am i able to plug it in anywhere else and have the same level of quality/ still be using the sound card? For example, my headphones have a USB connector, so if i plug them into a USB port, (on the motherboard) am i actually using the sound card? Hopefully that makes sense, thank you for any help or knowledge you can offer.