EpIckFa1LJoN :
4790K is still a very good CPU. It's like 5% slower than an i7 6700K, and I paid over $300 for mine.
Im no expert on the 97 boards but I think you want Z97 chipset if you plan on overclocking, and since you are getting an unlocked CPU the Z97 would deff be worth it. I like MSI's overclock genie so you might look into an MSI board. Takes a lot of the trial and testing out of overclocking.
I went with the 6700k and an MSI Z170m mortar. cryorig H7 for cooling.
Mine does that as well. It doesn't seem to have an effect on performance. I am running a stable 4.2GHz and my water block rarely gets over 30C.
The cores themselves seem to jump around.
I do not know why, but like I said it does not seem to effect performance.
Build went great but i am having some temp and fan issues now.
Ran prime and i got 80c after 30 minutes. And for some reason my temps keep jumping around in any monitor i use.
3 cores will be 30c and one of them will randomly jump to 50c for a second. It isn't just one core either, it rotates. Each core wil take turns jumping to 50c it's weird.
I have windows 7 that has no updates yet because of a fresh install off disk. I am gonna upgrade to windows 10 and see if that fixes things.
Might just be a software issue :/ i hope......