IgorsLAB published Solving unexplained interrupt problems: Message-Signaled Interrupts (MSI) against sound dropouts, USB problems and Co. A quote from the article:

If the sound card drops out or cracks, USB devices do not work or only work sporadically or the performance drops, then interrupt conflicts are usually the cause. This is something that Windows users have long since ignored out of sheer convenience, although the problem is as old as PCs.

  Solving unexplained interrupt problems: Message-Signaled Interrupts (MSI) against sound dropouts, USB problems and Co.