Basic questions: El Captain / Z170X Gaming 5 – i7 6700k - GTX 950

Hi there!
I have finally ordered my new Hackintosh from scratch. I use only parts from Buying Guide / CustoMac Pro:

Mobo: Gigabyte GA-Z170X-Gaming 5
CPU: Core i7-6700K
Graphics: EVGA GTX 950

Other Hardware
Crucial Ballistix Sport LT (16GB)
Corsair H60 (Water)
Samsung 850 EVO 250GB
Seagate Barracuda 1TB
Corsair RM 650 Watt
Corsair Carbide 300R
TP-Link PCI Express Wifi Adapter (N)
Dell UltraSharp U2414H

I´m reading through this forum for...

Basic questions: El Captain / Z170X Gaming 5 – i7 6700k - GTX 950