I'm very new to building computers and I need help with the compatibility of a motherboard to a graphics card, the motherboard I am thinking of getting is "GA-890FXA-UD5" which you can find here: http://ca.gigabyte.com/products/product-page.aspx?pid=3781#ov ,the graphics card I am thinking of getting is the "ATI Radeon HD 5870 Graphics" card which you can find here: http://www.amd.com/en-us/products/graphics/desktop/5000/5870 , the motherboard description states that it supports 3way ATI CrossfireX. I'm not entirely sure if they're compatible, help?