Why optimize the BIOS?
The BIOS is special software, stored on a chip, that interfaces the major hardware components of your computer with the operating system. It provides an interface between the operating system and the hardware, acting as an intermediary between a computer's hardware and its operating system. Without the BIOS, the PC's operating system would have no way to communicate with, or take control of, the hardware.
The BIOS is a crucial component of any computer. If the BIOS is not configured properly, you may be able to boot up the operating system and run it for a while. However, the system will become unstable and eventually crash.
BIOS optimization is critical not only to the optimal performance of the computer, but also to the proper functioning of the system's components. Computers these days are made up of a hodge-podge of different components from different manufacturers. This presents a real problem when it comes to getting them all to work together.
Because of the variety of components that make up any one computer, it is impossible for manufacturers to optimize their motherboards for any particular configuration. That's why all motherboards come with configurable BIOS.