What is the Difference Between CMOS and BIOS?

The terms BIOS (Basic Input/Output System) and CMOS (Complementary Metal-Oxide-Semiconductor) refer to essential parts of a computer's motherboard, but they are not the same thing. The main differences between CMOS and BIOS are:

• Function: BIOS is the program that starts a computer up, initializing and controlling components like floppy and hard drive controllers. CMOS, on the other hand, is where the BIOS stores the date, time, and system configuration details it needs to start the computer.
• Memory Type: BIOS is a firmware stored in a chip on the computer's motherboard, while CMOS is a type of memory technology used in the design of a computer's memory chip.
• Location: The BIOS is located on the motherboard as a firmware chip, while the CMOS is located on the motherboard as a low-power, non-volatile memory chip.
• Data Storage: CMOS is responsible for storing important configuration data even when the computer is turned off, whereas BIOS initializes and tests hardware components during startup.

In summary, BIOS is the program that starts a computer and controls its components, while CMOS is the memory chip that stores the system configuration details needed for the computer to start up. They are distinct but related components of a computer, working together to ensure proper functioning during startup and operation.

Comparative Table: CMOS vs BIOS

Here is a table summarizing the differences between CMOS and BIOS:

In summary, CMOS is a memory chip that stores important configuration data and settings, while BIOS is the firmware that initializes and tests hardware components during the startup process.