I looked again, the x1 slot is blocked by the video card. Will it really damage the card to use it in a x16 slot? I guess I need to try using the video card in one of the 3 other x16 slots to see if it will work but I'm not confident it will. I may need to find a single-slot card.
Install guide on the Ceton site says this
Install the Ceton InfiniTV 4 in any open PCIe slot. It can be PCIe x1, x4, x8 or x16
I stopped by my local office for the cable company, despite being told on a chat last night that I can just pop in to the local office and pick up the CableCard and tuning adapter the local offices do NOT carry those items, but he was able to order them for shipment (he wanted to force a home visit but I expressed my knowledge of my right to self-install). However, he DID give me a couple splitters and RG6 cables so I could hook up my modem, the PC and my DVR on one outlet.