So I'm planning on buying two more graphics cards to install in my computer (Sapphire DUAL-X R9 270 OC 2GB) and was wondering if I could crossfire them with my existing card, a Sapphire Technology Radeon R9 270 Overclocked 2048MB DDR5. Would this crossfire work? And with crossfire, can I use one ribbon to connect to a second card, and then from the second card connect to the third? Can crossfire be used in that way, or is it only capable when two cards are directly connected?