I have a Hauppage 1600 that happens to have clear QAM support. Granted, I have a 3 year old Athlon 64 3200+, 2 gigs of RAM, and a 128 meg 6600 GT in my computer the HD content comes in choppy. If anything I would try out any PCIe versions of clear QAM cards - but I don't have such luxuries on...