I'm thinking about doing dual graphics because it will be cheaper then buying 2 graphics card. I'm thinking about getting this graphics card http://www.newegg.com/Product/Product.aspx?Item=N82E168... but I don't know what cards would make it dual graphics and I just don't know. I don't know if I need a specialized mobo and psu. I have no idea how this Dual Graphics works. Please help me.