I have to replace my work-PC and the new one will be different than my flightsim-PC, but of, more or less, comparable power and now I'm not sure which PC to use for general work and which one for flying.

My current flightsim-PC:

Intel i7-4790k @ 4.7GHz, Asus Z-97Pro Gamer, DDR3 @ 2400MHz

My new PC:

Intel i7-7700 @ 4.2GHz (standard turbo, I cant say anything about OC yet), MSI Z170A MPOWER GAMING TITANIUM, DDR4 @ 2400MHz

Everything else is interchangeable, so my question is about the components mentioned. Which of those basic setups would be best for flying?

Your current pc will be faster at 500 MHz faster imo.  Even though there are some generational speed increases.

Oh man, I'm totally messing up, here... Been sleeping very bad, past week, it seems it starts to show. :P

I'm looking in the wrong column. Of course I'm talking about the 7700k, which would be 4.2GHz withóút turbo and might likely end up at the same speed as the 4790k. Let's take as baseline that both CPUs will be 4.7GHz.

So it comes down to the generational difference and what the more expensive motherboard might add to that, along with the DDR4 against the DDR3.

The 7700K will perform better.... It's about 10% more power from each new Intel generation, so the 7700K is 2 generations above your 4790K. For flight sims, it's not as simple as that, but 7700K will be better for sure.

Mike

At 4.7 I agree the 7700 wil be better.  At 4.2 it would be almost the same 

Thanks guys! :)