I7 6700k is better just to avoid any problems with your mobo ,deffernce between I7 6700k and i7 7700k is like 5%I currently have a Asus H 170 Pro motherboard and a I 5 6600 processor. I'm considering replacing the CPU with a I7 7700K. Is this a worthwhile upgrade? I do 1080p at 144 gaming and have a 1070 Video card. The board will take it with a Bios update.