I have 2 HIS Radeon HD 4670 Ice Q Graphics Cards. I have a MSI 870A-G55 Motherboard. And im trying to Crossfire the graphics cards. Now it says that i dont need a bridge for them there just a plug and play. But as i did that they both show up and working fine but i have no option to Crossfire them in the AMD control Engine. Iv downloaded the newest drivers and still nothing. Iv made sure both cards are working plugging them in and out testing each one and they work fine. Both cards and motherboard are compatible with each other from what i read so im out of ideas i need help please.