Gigabyte H270M-DS3H Ethernet Not working

Hi guys,
I've got my Hackintosh successfully installed
I've done the multi beast config
But nothing recognize my integrated Ethernet.
It says in system: No PCI Ethernet Seems to be install on this computer.
Have you got ideas?
And i have a WN300 From tp link and i wanted to download the kext file by ethernet.
Thank You.
Jules