I think you should buy a new combo CPU+RAM+Motherboard. Because your old Asus H81 is not good for i7 CPU, and GTX 1070. K series is not needed.
Best solution now is Ryzen 5 1600 + Good B350 mother board (Asus ROG Strix, Gigabyte Gaming 3, etc...), and RAM with high bus speed.
I am using Ryzen 5 1600, Asus ROG Strix B350-F Gaming, Gskill Trident Z 3000. It work very well.
Another choice, i5-7600 (Non-k) and B250 mother board.
And, Please buy a good motherboard.