{Go to cmd then type in ipconfig /all } you will see your address make sure both realtek and nvidia lans are enabled to see both. I dont know what you did but you should have written it down before flash. Both addresses are not exactly the same. If they are the same you can try ipconfig /release then ipconfig /renew but make sure you dont have an adresss of EEEEOOOFFFFF or something like that. Maybe you should try and disable your lan connections when you flash your bios thats what i do and i never loose my address. ever.