I went from an AMD Radeon HD 6970 today to a GeForce GTX 670, and for some reason when I play Battlefield 3 people can hear a loud static coming from my microphone, when it never happened before. I have a dedicated sound card for my 5.1 headset, and the only thing I have plugged into my GPU is my monitor. I don't know why the GPU would have anything to do with it, but I'm just making sure.