How to buy a motherboard.

Choosing a motherboard can be just as hard as choosing a girl to get married. There are different types, manufacture, chipsets, functionalities to lookout for.  Only person who can say what motherboard he/she wants is you only.  You have to get motherboard according to your need.  I have written this just to help you with that. 
Or you jest buy a laptop and skip reading. 

there are 4 motherboard size shown in the picture.

 

You can get a motherboard according to work you attend to complete on the system. First determine what kind of work you want to do. If you are doing video editing and sound editing get i7 processor latest gen cpu then buy a motherboard that cpu fits into. 

Getting a product designed for your use case.

For this I’m going to demonstrate 2 motherboards and compare it. 

Shown in the picture is motherboard generally used for server. It has two CPU socket eight RAM slots which can support up to 64 GB DDR4. It has 4 LAN port + one remote LAN port for remote management.

You can also see the CPU sockets are different form normal ones because they are designed for high end AMD Threadripper processors which can cost up to $900. They are useful for high threading workload.

If you are planning to buy your system for home or work use this motherboard would be not practical because all features of this motherboard will not be fully used and features, you need for home or office use are not present in it with enhanced user experience

 here is a board you will likely use

It’s ASUS Prime Z390-A designed for higher gaming performance.  It has LGA1151 which supports i7 8^th and 9^th generation CPU. It also has over clocking feature. Over clocking is CPU ability to process in higher frequency if required. Over clockable cpu like that will need more power simililar kind of head sink, power supply which can supply higher power and motherboard which is compatible with it. 

Chipset

Chipsets are sets of chips which control communication between different components like CPU, RAM, Hard disk, Keyboard mouse etc. There are two main sets of chip which control their function. They are called Northbridge and Southbridge. Northbridge controls communication between CPU, RAM, Graphics card. They are also called front side bus, when referring to board speed they refer to the speed of front side bus. New motherboard Northbridge function are controlled by CPU itself.

Southbridge is located in lower part of motherboard. It controls PCI slots, I/O chips, hard disk,USB and audio. It communicates and sends data to northbridge.  

There are mainly two types of chipset manufactures that are used to build a motherboard. AMD and Intel. They have been constant rival in PC business for many years. AMD CPU are compatible with AMD chipsets motherboard and Intel CPU are compatible with intel chipset motherboard.