So which of these cards will give the better performance for 1920x1080 game play? http://www.amazon.com/Sapphire-DL-D...=UTF8&qid=1372567237&sr=8-2&keywords=AMD+7970 or http://www.newegg.com/Product/Product.aspx?Item=N82E16814121803 I do know that the 280x is pretty much a 7970 card, but just thought I would see if there is a difference, since the 7970 is more money.