El Capitan 10.11.6 5ghz & ethernet problems

Hello everyone I just succeeded in installing 10.11.6 on my pc and everything was running smoothly until my wifi card couldn't detect my 5ghz band and my ethernet port is nonfunctional. If anyone knows any possible solutions for me that would be awesome! Here are my pc specs:

Mobo: z97x-ud7 th
CPU: i7 4790k
GPU: asus gtx 970 strixx
RAM: 32gb crucial ballistix tactical (8GBx4)
PSU: 750w
CPU Cooler: H100i
Case: NZXT H440
Storage: 250gb ssd
500gb ssd