Its my understanding that the windows operating system will load some basic
drivers needed to make your system usable so you can load the windows operating system. Some of those will be chip-set
drivers that I believe are submitted by the various manufactures like NVidia ,AMD etc. The chip-set
driver package you download from your motherboard manufacturer will almost always be newer and more specific to your hardware than the ones included with windows. As far as looking for them in device manager they are there, they are just scattered about. Click on system devices and I'd say most of that list if not all are related to your chip-set
drivers. The motherboard chip-set interfaces to all of the hardware on the motherboard. Well it used to when the north bridge and south bridge chips were both on the motherboard. I'm sure if I hadn't mentioned that someone would have corrected me.