If it is a controller on the motherboard then you should find the correct driver on igabyte download driver.
I do not own this motherboard, I do not know which link download would be appropriate for you (if more than one). All I can say is download, open and check if you can update instead of only install. If install is only present then my suggestion is to first remove your drivers then re-install with newest validated drivers (not beta).
Also and before all this, open your BIOS and check that your PCI and communication are open and/or to default setting.