Yeah that is one of the best CPU's for Dolphin and you probably should be able to get it up to those clock speeds due to improved TIM on the chip compared to the 4670k. The only game which you might encounter some lag is hyrule field Twilight Princess but even then you should be very close to full speed if not full speed.
[color=green]Windows 7 x64 / i5 4690k @ 3.5 GHz / GTX 970 / 8GB RAM[/color]
