Need some help for my new system!

djklaatu

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May 22, 2013
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Hey guys so i want to get an I7 7700K + MSI GTX 1060 GAMING X 3GB + ASUS STRIX B250H GAMING + Zalman Z11 Plus + Corsair Vengeance LPX 2x8GB DIMM, DDR4, 2400MHz, CL14, 1.2V, XMP 2.0, Black
I already own a Seasonic M12II-520 EVO Edition Bronze 520W and I want to get a CPU Cooler Noctua NH-D14 with Artic Silver 5 paste

So with that said my questions are:

1. Is the the cooler noctua nh-d14 gonna fit in the case with that specific motherboard ?
2. I heard bad things about the i7 7700k about overheating and such , will that happen only if i try to overclock it and how can i fix it if it happens?
3. Can my power supply keep the whole system running or i need more then 520w for this system?
4. Is the paste artic silver 5 good or should i use the one that comes with the cpu cooler from noctua? Basically which one is better?
5. And the last question what do you guys think is better between ASUS STRIX B250H GAMING and GIGABYTE GA-Z270X-Ultra Gaming ?