Hi:
You need these two drivers for the PCI Device and USB Controller:
For the unknown device, I will need you to post the hardware ID. Just copy and paste the text of the ID to your reply.
If you don't know where to find the hardware ID, please use the guide at the link below.
http://www.wikihow.com/Find-Hardware-ID
As far as the processor, etc, you should install the chipset installation utility if you have not done so already.
This will ensure the motherboard has the most up to date drivers for best performance.