I had a 4690k OC'd to 4.5, but regardless of that the CPU you have should be enough for a 1070, it will bottleneck slightly, but it will be enough to handle the 1070, it's a solid processor and you wont run into any real sort of problems unless you're playing in open world games and you place ultra in the number of characters you want appearing in your games like The Witcher 3 or Grand Theft Auto 5; or if you play very CPU demanding games.