Summary: I had been unable to recover my left speaker channel on my Intel Mother Board sound card, Vista OS. When I first installed the sound card it improved the left channel 75%. After a few restarts and updates over the following week the card is working great. Any previous sound problems were Operating System or Motherboard related.
Pros: Have used these cards in both Linux and Windows boxes with no problems. Currently have 6 on low profile brackets in a 2RU Debian box digitizing 6 stereo signals to stream to the internet, 4 in another 2RU Debian box, 1 each in several 2RU servers, and 4 on full size brackets in various Windows boxes in the house. Several of them are over a year old, and have experienced no compatibility issues.