I want to upgrade my video card set up. At the moment I have a single ASUS 7770 1gb on a motherboard that doesn't support crossfire. Im wondering if its worth it go get a new motherboard with crossfire and get another ASUS 7770 or should I sell my ASUS 7770 and get a GTX 650ti? Or can anyone suggest any other graphics card that are around £150 and not over £170. And if you are in favour of the crossfire, can you suggest a motherboard for around £70?