Tony,
Your best bet is to find the model number of your motherboard and go to the manufacturers website. All decent vendors will have the ability to download existing and updated drivers for all the components on their motherboards.
It can be quite important to use your motherboard vendors drivers rather than generic drivers as the implementation on the board can vary from manufacturer to manufacturer.
I would provide a link however you have not provided your motherboard details.
Cheers
Jof