Plug GPU into motherboard and move HDMI to plug into GPU
Turn on PC, now it should work perfectly. You can check by
lsmod |grep nvidia #this will show something, not empty
Wifi Driver
Check for wifi hardware version by this command and look for something about WIFI/Wireless/Network. Note that as of today, this works with kernel version 4.10.0-28. Kernel version 4.13 doesn’t work!!! (Select ubuntu kernel when turn on the PC)
#for me it’s b822 (which means version 8822be)
lspci
Install git command line package and clone wireless drivers