What does the BIOS have

Apps / software What is bios

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You have probably already seen the BIOS when you booted your computer. Or not? In this article, we will explain what happens when a computer starts, what role the BIOS plays, and how to find out what version of BIOS is on your computer.

What does BIOS stand for?

The term BIOS hides behind the abbreviation BIOS Basic input / output system. Its task is to start up the actual operating system of your computer, to initialize it and to test the hardware. This so-called Power-on self test (short: POST) ensures that the most important components are functional. This includes the memory, the CPU, the interrupt controller and other hardware. The BIOS is itself a type of operating system and is located in non-volatile memory on your motherboard. As soon as you press the power button, the BIOS also starts. It is inherently located on every computer and, unlike operating systems such as Windows or macOS, does not need to be installed. In the meantime, more powerful PCs are often used with more modern PCs Unified Extensible Firmware Interface (abbreviated: UEFI) is used. It should completely replace BIOS from 2020.

Tip:Sometimes it is necessary to update the BIOS. In a separate article we explain how to do this.

Which BIOS version do I have?

Depending on the brand of your computer, there are different keys that can be used to start the BIOS. In another article we will show you which keys for which device can be used to start the BIOS. You can then check which version is on your computer in the BIOS menu. If your computer has already started up completely, there is another possibility, which we will explain to you below:

Windows

Mac