A GTX970 is somewhere between a GTX1060 and GTX1070 (closer to the 70).
gtx980 actually sits around gtx 1060 reference so the 970 is a fair way behind the 1070 which is over 30% faster than a 1060 oc
af doesn't have much of a performance hit these days and i have never liked the image quality below 8x af
aa however can have a massive performance hit for minimal gain although it can be nice to have
some games need aa\af more than others
Oh shit, you're right! my apologies. I was running off memory.
But we're almost agreeing (not entirely on the AF, but still).
"Any AA and AF is usually enough"; if you can use it, that's what you need :)