I recently upgraded my motherboard to a Gigabyte 990fxa-ud3. Everything is working except for my wireless card. I don't know the exact model of it but all i know is that i can't connect to the internet.
If you don't even know the exact model, then how did you ever install the drivers?! Or did you just accept the default drivers provided by the Windows installer? If you did, realize those don't always work. Sometimes the installer chooses the wrong drivers, or outdated drivers. It's usually better to install the drivers provided by the manufacturer (see their website and look under Support) rather than accepting whatever Windows decides to install by default.