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How To Tell What Size Motherboard You Have?

How To Tell What Size Motherboard You Have?

Every computer has a motherboard responsible for interfacing with the CPU, graphics card, and other components. The motherboard size is essential because each size comes with different specifications, such as ram slots, PCIe lane, and storage options. To find the correct motherboard for your needs, you’ll need to consider the key dimensions, such as width, height, and case size. So how do you tell what size motherboard you have? Let’s find out.

There are a variety of motherboard sizes available, depending on your needs. The most common motherboard size is the ATX, the most popular type of motherboard form factor. Other standard sizes include Micro ATX, Mini ITX, and ATX. If you need a motherboard smaller than the ATX, you might want to look at Mini ITX or Micro ATX Motherboards. 

How to tell what size motherboard you have?

If you’re looking for your motherboard’s size, there are a few things to keep in mind. The most important thing is to remember the basic dimensions of a motherboard, including width and height. In addition, many motherboards come with different naming schemes, so it cannot be easy to tell which one you have. Here’s a guide on how to tell what size motherboard you have:

Width: This is the width of the motherboard in inches.

Height: This is the height of the motherboard in inches.

PCI-E Lane Count: This tells you how many PCI-E lanes the board has.

RAM: Number of RAM slots.

If you’re unsure what size motherboard you have, it’s a good idea to try finding one online. You can search for the motherboard model on the manufacturer’s site and select the specifications tab to find out the details about your motherboard.

What does ATX stand for? 

ATX stands for (Advanced Technology eXtended) motherboard and power supply configuration specification developed by Intel in 1995 that improved on previous AT design standards.

What are the 3 sizes of motherboards?

The three form factors are mini, micro, and ATX. ATX boards are the most popular, while Mini ITXand micro ATX boards are becoming more popular. Here is a look at each:


EATX: This motherboard factor comes with 8 ram slots and 4 to 5 PCIe lanes which gives a lot of upgradability options. this type of motherboard is usually used in workstations or for high-end pc. they are usually made for high-end processors such as the i9 series and AMD thread ripper series.


ATX: ATX boards are designed for larger computers and require more resources, making them better suited for gaming or high-end applications. These motherboards come with 2 to 3 PCI-E slots and plenty of storage options. Which also supports multi-GPU setups.

Micro ATX boards
Micro ATX

Micro ATX: Motherboards are designed for smaller computers and require less power, making them better suited for personal pc. They come with enough 2 PCIe slots and enough storage options. unlike  ATX only a few models support multi-GPU setups such as AMD crossfire or Nvidia SLI

Mini-ITX motherboards
Mini ITX

Mini ITX: Motherboards are designed for mini PCs and require less power and more space, making them better suited for compact rigs. The only downside is they costly, and there are few to choose from when compared to ATX or Micro ATX. they are mostly used for compact builds, which require less space and are easy to move around compared to ATX builds.

Are all ATX motherboards the same size?

Many people believe that all Atx motherboards are the same size. However, there is actually a lot of variation in their sizes. Some Atx motherboards are smaller than others, and some are bigger such as Micro ATX and ATX. Before you buy an Atx motherboard, be sure to read the specifications and compare it with your case manual to see if they are compatible or not.


In conclusion, it is important to know the size of your motherboard to determine which graphics card to buy or upgrade. This information can be found on the motherboard’s product page or by contacting the manufacturer. Also, you can visit the manufacturer’s website to learn more about the motherboard.

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