Will this gpu fit in my tower it has a 620 in it now. thanks http://www.bestbuy.com/site/gamer-xtreme-desktop-8gb-memory-1tb-hard-drive/2541141.p?id=1219074179173&skuId=2541141&st=cyberpowerpc&cp=1&lp=6#tab=overview http://www.newegg.com/Product/Product.aspx?Item=N82E16814130932