You need to install windows, it might ask you to install the motherboard drivers midway through the installation. Drivers just tell the OS how to talk to the hardware, so drivers are useless prior to installing the OS.
In fact, as Windows is installed, it also loads in from its own CD virtually all the drivers it needs to deal with all the devices it discovers in your system. Ther are times when the drivers it has are not the very best, but they will do OK to get running. That is why may hardware and motherboard makers supply a CD with drivers on it, AND why they make even more recent updated (and supposed to be better!) drivers available on their websites. You can update any device driver already installed in Windows (including those that Windows' basic Install put there) after Windows is running. Usually it is a very good idea to do just that. As soon as you have Windows installed and operating smoothly, update all the drivers you can.