Since there's a lot of drivers, for motherboard, chipsets, audio, keyboard, SATA, processor, etc., how to know all the drivers I need? PC works great with only the video drivers, even sound's 5.1, keyboard, monitor, mouse, everything works great with any games or software I've ever used. Honestly I don't even get WHY I need the drivers.
You don't need any drivers, as long as everything works. If you run older (or compatible) hardware, Windows already has all the drivers. You only need driver, if you get the yellow exclamation mark in device management. Remember: never touch a running system!
Microsoft will install generic drivers automatically, but they often do not give the best performance. Take the time to visit your m/b maker's website and get the current chipset, lan, and sata drivers - each is geared to enhance performance of your specific m/b.
You download the current video drivers for best experience, why not do the same with the other drivers?