Pretty much every single Windows machine I have ever owner has always came with Realtek Drivers for managing audio. Realtek Driver is the most commonly used sound driver for Windows system and it comes with incredible features and supports a six-channel Digital to Analog Converter (DAC) with 16.20.24-bit Pulse Code Modulation in channel audio of 5.1.
Realtek HD Audio Driver is the most commonly used sound driver for managing the audio settings on a Windows system. Realtek High Definition Audio Manager, also called as Realtek HD Audio Manager, comes packed along with the Realtek Audio driver.