With the GTX cards, the 10 is the series, it's the 50ti or 60 or 80ti that you'll find the horsepower. Dropping down a series usually gets you ballpark for a 1 power less card, so a 970 is close to a 1060, a 980 is close to a 1070 or a 1060 is close to a 780. Not exactly the same, but ballpark. By comparison, my 660ti would be close to a 1030ti (if there was one) so definitely bringing up the rear.