[Kerbal Space Program update 1.1 “Turbo Charged” is now available!]

16 hours ago, Wild Cobra said:

I guess it depends on who you go by. According to Passmark, the i7-4790K is still the king of the hill when it comes to single thread speeds. However, I was wrong in that your 6700K is one of the seven processors listed that has a faster single core speed than mine 3.6 ghz i7-4790.

https://www.cpubenchmark.net/singleThread.html

This is why you should always look at real world benchmarks, not artificial ones If you look at real world numbers, the 6700K wins out in pretty much every scenario. Not by much, so in real world scenario's, you are unlikely to notice any difference.

The i7-4790 without K designation has a significantly lower clockspeed, so it is to be expected that it is slower than both the 4970K and 6700K.

[Kerbal Space Program update 1.1 “Turbo Charged” is now available!]

28 minutes ago, Wild Cobra said:

I have the i7-4790 which is faster for single thread than your 6700

Why would you think that? Because the maximum clock speed is higher? The 6700K outperforms the 4790K, single thread and all 4 cores/8 threads, even though only by a small margin.