Will my motherboard work?

How does a mainboard work

The mainboard of a PC (also known as the motherboard) is the main board of the PC and thus the most elementary hardware component. A good half of all devices are plugged into the motherboard itself, while the other half is connected to the board via cables that run inside the PC case.

Thus the mainboard is the central data interface between all hardware devices of the PC, and if one wants to make biological comparisons, the mainboard would have to be called the nervous system of the computer. Without the motherboard, there would be no communication between the drives, memory, processor and all other parts; there would be no connection at all.


Mainly central hardware components are attached directly to the mainboard via slots and sockets, including the main memory, the processor, batteries, the BIOS, the graphics card and, if necessary, the sound card. Other devices, however, are connected to the mainboard via internal cables, including the power supply, hard drives, drives, buttons on the case and fans. And finally, on the edge of a motherboard facing the back of a PC, you will also find the connections for external devices such as the monitor, keyboard, mouse and speakers.

But what exactly happens in such a motherboard when it is in operation? The mainboard contains an extensive data line system, the so-called bus system. A bus is the connection of many devices, whereby a distinction is made between a data bus, address bus and control bus. As soon as a process is initiated on the PC that requires the cooperation of at least two hardware devices, the processor on the circuit board becomes active and puts the corresponding addresses, data and commands in a certain order on the buses. This also shows why the performance of a PC depends largely on the processor: It determines how quickly the bus signals can be processed one after the other.


In order for a mainboard to function properly with all other PC parts, it is very important to pay attention to the compatibility of the individual parts. For example, mainboards have different processor sockets, and only certain types of processors fit on these sockets. For example, sockets with code number 775 usually fit Intel chips. The size (form factor) is also important. The most common dimension is ATX (305 x 244mm) and only fits in correspondingly large cases.