need to know if these are the same but with different casing. I have the sapphire radeon hd 2g 6950 http://www.newegg.com/Product/Product.aspx?Item=N82E16814102914&cm_re=sapphire_6950_2gb-_-14-102-914-_-Product I am wondering if this card --> 6950 2g hd http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=140320&CatId=7005 is the same? And can i run them together in Xfire? Thx for help