They don't exist.
The i7-4790K works with Z97 based motherboards and uses DDR3 not DDR4.
If you want to use DDR4, you only have two choices. One is to use a Haswell-E CPU (i7-5820K, i7-5930K, i7-5960X) and an X99 based motherboard. Two is to use a Skylake CPU (i7-6700K) and a Z170 based motherboard.