Yes, plenty of people have tested those games on an i5-4670K. This CPU will run both games just fine. If you want absolutely no sound issues whatsoever, you still need LLE audio for SMG 1 & 2, but if you can deal with minor volume issues (and I mean minor, nothing gamebreaking) HLE audio in the latest development builds has since fixed many issues with sound in the SMG games.
As always, all you need to do is overclock until your performance issues go away when you have an unlocked -K model.
As always, all you need to do is overclock until your performance issues go away when you have an unlocked -K model.