BTF, or Back-To-the-Future, graphics cards are special in that they contain an additional connector to the side of the PCIe slot, through which the graphics card is powered. Thus removing the need for any pesky cables. It's a neat solution for clean-cut PC builds, though as I haven't yet built with it, I hadn't realised it also had a problem with compatibility until Asus told me all about it, and the incoming fix.
You see BTF graphics cards require BTF motherboards to run without cables. That checks out, as both graphics card and motherboard need to support a special connection, called GC-HPWR, to power the card.
