I am going to buy either the 980 ti or two 970s and put them in sli. My question is, which choice would give me better performance? The price would be about the same so what is the difference? I will be gaming at 1080p
970- http://www.newegg.com/Product/Product.aspx?Item=N82E16814487088
980 ti- http://www.newegg.com/Product/Product.aspx?Item=N82E16814487142&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Desktop+Graphics+Cards-_-N82E16814487142&gclid=CPq-vsSyq8YCFQ4paQodZiIOOw&gclsrc=aw.ds
970- http://www.newegg.com/Product/Product.aspx?Item=N82E16814487088
980 ti- http://www.newegg.com/Product/Product.aspx?Item=N82E16814487142&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Desktop+Graphics+Cards-_-N82E16814487142&gclid=CPq-vsSyq8YCFQ4paQodZiIOOw&gclsrc=aw.ds