HA Bytes is reader supported - So if you purchase through links on our site, we may earn an affiliate commission. More

HomeMotherboards21 Main Components of Motherboards

21 Main Components of Motherboards

A motherboard is the main circuit board of a computer that connects all the different hardware components together, allowing them to work in unison. It is an essential component that acts as the backbone of a computer. The motherboard contains numerous components, and each of them plays a vital role in the overall functioning of the computer.

What Are The Components Of Motherboards And Their Functions in 2023?

Here are the 21 main components of a motherboard:

CPU Socket:

A CPU socket, also known as a CPU slot or CPU connector, is a connector on the motherboard that holds the processor. It connects the processor with the motherboard, allowing the CPU to communicate with other components.


The Northbridge is a chipset that connects the CPU with high-speed components such as RAM and graphics cards. It manages communication between the CPU and RAM.


The Southbridge is another chipset that connects slower components such as hard drive, USB, and audio to the motherboard.

RAM Slots:

The Random Access Memory (RAM) slots are the connectors on the motherboard that holds the RAM. It stores the data temporarily that the CPU needs to access quickly.

CMOS Battery:

The CMOS battery is a small battery that provides power to the motherboard when the computer is turned off. It keeps the system’s real-time clock running, which is used to maintain the system’s date and time.

BIOS Chip:

The Basic Input/Output System (BIOS) chip is a small chip that stores the firmware that initializes the hardware components of the computer when it’s turned on.

PCI Slots:

Peripheral Component Interconnect (PCI) slots are connectors that allow expansion cards such as sound cards, network cards, and graphics cards to be added to the motherboard.

SATA Connectors:

Serial ATA (SATA) connectors are used to connect the hard drive, solid-state drives (SSD), or optical drives to the motherboard.

IDE Connectors:

Integrated Drive Electronics (IDE) connectors are used to connect the hard drive or CD/DVD drives to the motherboard.

Power Connector:

The power connector is used to supply power to the motherboard from the power supply unit (PSU).

ATX Connector:

The ATX connector is a 20/24-pin connector that powers the motherboard and all its components.

12V Power Connector:

The 12V power connector supplies power to the CPU.

PCIe Slots:

Peripheral Component Interconnect Express (PCIe) slots are connectors used to add expansion cards such as graphics cards and sound cards to the motherboard.


A chipset is a set of electronic components that manage data flow between the CPU, RAM, and other components on the motherboard.

USB Connectors:

The Universal Serial Bus (USB) connectors are used to connect peripherals such as printers, keyboards, mice, and smartphones to the motherboard.

Ethernet Port:

The Ethernet port is a connector that allows the computer to connect to a network.

Audio Connectors:

The audio connectors are used to connect the speakers, headphones, or microphone to the motherboard.

Fan Headers:

Fan headers are connectors that supply power to the computer’s cooling fans.

Heat Sink:

The heat sink is a device that is attached to the CPU to dissipate the heat generated by the processor.

Expansion Slots:

Expansion slots are connectors that allow the addition of expansion cards to the motherboard.


Jumpers are small connectors that are used to set specific hardware configurations on the motherboard.

Wrap Up!

Finally, a motherboard is a vital component of a computer that links all of the hardware components and serves as the system’s backbone. It is made up of various components, each of which plays an important part in the general operation of the computer.

Knowing the many components of a motherboard, such as the CPU socket, RAM slots, SATA connections, and expansion slots, will assist you in selecting the best motherboard for your computer needs.

Motherboards have changed with technology, and newer versions provide more features and higher performance, making them a crucial component in assembling a high-performance computer.

Further Reading on HABytes:

HA Staff
HA Staffhttps://thehabytes.com/
HA Staff is a team of writers that work together, researching new products everyday, buyer's guides, fact-checked, and daily life problem solving toturials.

Leave a Reply