Hello
May I remind you that this forum is read by many different people, of many different cultures and ages. Not all cultures really value swearing. Not all families want to have their children visiting a support forum where swearing is acceptable. So please while I can understand that you are a little upset about something, there really is no need for swearing on ROG. Thank you.
Now I am sure that someone who is familiar with your LAN card, or LAN issues in general will be able to comment. I do not have the LAN card so am unable to duplicate your issue, and therefore not able to provide any answers specifically.
What I can do is ask the method of the update to the latest BIOS? And what was your previous version that you updated from?
Both those question are quite important, as the later or three series BIOS required a firmware update too. And for that reason there is a very specific method of BIOS flashing that was recommended. In my sig is the correct method that should have been used for those wishing to update to the three series of BIOS.
To help us help you - please provide as much information about your system and the problem as possible.