The
506E8 is based on
Kaby Lake architecture while the
i7-4790K is based on
Haswell.
Using the multithread performance as a reference, the 506E8 gets a score of
211.6 k points while the i7-4790K gets
215.5 k points.
Summarizing, the
i7-4790K is
1 times faster than the
506E8. To get a proper comparison between both models, take a look to the data shown below.