What is the BIOS and what is it for?


The BIOS is a motherboard firmware that works through the PC and is responsible for storing essential information so that the computer can boot properly, the BIOS is executed when you turn on the PC, it is responsible first for checking that the peripherals are Operating correctly. The configurations made in the BIOS are stored in another memory called RAM-CMOS that this is in charge of saving the configurations like the hour for example. The RAM-CMOS memory is fed from a clock battery.

In previous article, we explained in details how to enter BIOS, and here, we will talk about what it is and why you should know it. It can control the behaviour of the hardware and allow us to change essential information to be able to start the system correctly. To access the configurations that can be made in the BIOS you have to press a key or a combination of these which will depend on the model of the motherboard that you are using.

BIOS Functions and Utility

The BIOS is stored in a ROM and through it, you can:

  • View and modify the system time.
  • See processor temperature.
  • Overclock the processor.
  • Modify processor voltage and consumption.
  • Change the fan speed of the processor.
  • Modify the RAM frequency.
  • Change the boot configuration.
  • Disable PCI ports and hard disks.
  • Change functions and features of integrated chipsets.
  • Modify how your computer will turn on.
  • Enable and disable built-in motherboard functions.
  • Enable or disable motherboard ports and components.

When you turn on the computer, the first thing you start is the BIOS to verify that all system settings are correct and to ensure that your computer hardware is working properly. In case something is not configured correctly or the BIOS is failing, it will not immediately notify you via an error message.