danielthegreate :
If you OC the 6600k to 4.5-46 or so, there is pretty much no significant difference between that and the 7700k. There is a few fps difference in some games but I really doubt that one could tell the difference without running benchmarks.
6800k is pointless for gaming, and even more pointless for anything else as cheaper multi-core options are available for productivity from AMD. If you only want intel, it would be wise to keep your 6600k and wait for their next lineup if you want more than 4 cores.
But if i buy the 7700k, will i be able to install it in my current mobo.
I have a noctua nh-d15, so if i overclock the 7700k to something like 5,2ghz, will i be able to feel any significant difference between the 6600k overclocked to 4,5ghz and the 7700k @5,2ghz