gtx 980m

Hey everyone! I have a serious problem with my laptop. I have a HP Elitbook 8770W and recently I upgraded my GPU from nVIDIA Quadro K5000M (Kepler) to nVIDIA GeForce GTX980M (Maxwell). I attempt to install macOS Sierra on my laptop when I still had K5000M and everything was OK. After the upgrade...

Hello ! first sorry for my english ...;) i have got a problem with my hackintosh : when i plugged hdmi , thunderbolt or vga nothing happend exept my laptop screen freezing and i must power off and restart my computer if i plugged hdmi thunderbolt or vga before power on the computer , this one...