Read the spec on the Hauppauge card carefully. The HDMI input is not HDCP compliant so it cannot be used with cable/sat, dvd, or bluray sources. They say to use component video. As far as I know you can't buy an PC board that has HDCP HDMI inputs.
And yes as ssddx says it makes no sense especially as you cannot use the PC as a recorder with HDMI.