LanOC Reviews published a review on the Intel i7-4790K Devil's Canyon
A quote from the article:
When it comes to CPUs there are only a few options available when you are looking for the fastest performance. Up until now you could go with a Haswell CPU or if you wanted more cores The Ivy Bridge-E CPUs. AMDs has done well on the integrated GPU side of things but for pure CPU power Intel has been the only way to go. Recently Intel announced their latest refresh with their Devil's Canyon CPUs. Today I finally have the chance to put the i7-4790k to the test and see what kind of improvement it is over the i7-4770k.Intel i7-4790K Devil's Canyon @ LanOC Reviews