A:Answer A 1080 gtx card should have multiple hdmi/display ports; just plug the cable into one of the display ports (just a note, try for one that is not next to an used port; I had a connection issue due to the hdmi cable and display port cable not having enough room between themselves). For the usb cable, it strictly needs an usb 3.0 connection. After that, just download software and folow instructions!
The 32gb and 64gb are on-board starage capacities which, don't quote me, I think are only on stand alone VR head sets (ones where you don't need a computer) and has no relation to the rift S. The rift go is the one that needs on-board storage.
