Actually, those in the know can fix that problem. The problem is that the Hauppauge cards (by default) write their data to the primary plane of your video card. This has to be done through the CPU and uses a *ton* of resources. What you want is to have it render on the overlay plane (PCI push).

You can do this by going to the "Primary" program, and changing it from "Force Primary" to "Allow Overlay". Voila! 1% CPU usage, and faster startup time to boot!