ATX vs Micro ATX vs Mini ITX – Best Motherboard Size


Planning to build a pc by yourself? In this article, we will review ATX vs Micro ATX vs Mini ITX. 

Choosing the best motherboard for your needs is quite a difficult task as you cannot say easily that which type of motherboard suits you.

By having a look at these motherboards, one only thinks that the only difference between them is of size, but thinking this only is completely wrong.

There are many differences among these motherboards, which we are going to explain to you in this post.

The most important factor when choosing between these motherboards is that for what purpose you need them.

These motherboards are designed specifically for their assembled purposes. Let’s have a quick overview of these motherboards and their specifications and then we will move on to their pros and cons.

Before moving any further, let’s have a look at the sizes of these motherboards.

ATX: 305×244 mm or 12.0” x 9.6”

Micro ATX: 244 x 244mm or 9.6” x 9.6”

Mini ITX: 170 x 170mm or 6.7” x 6.7″

ATX vs Micro ATX vs Mini ITX
ATX vs Micro ATX vs Mini ITX

After having a look at these measurements you can see that the biggest motherboard among these is the ATX and following it up is the Micro ATX and the smallest among them is the Mini ITX.

ATX and Micro ATX motherboards share the same amount of width and look very similar to each other.

The only thing which is not similar in these motherboards is their length. The reason for the ATX motherboard to be lengthier is that it has more PCIe Slots.

Increasing the Installment of more PCIe cards in it. Whereas the Mini ATX is smaller in size and much cheaper than its competitors.

ATX Motherboards

Standard ATX Motherboard
Standard ATX Motherboard

ATX motherboards are the best option if you are going to build a workstation or a high-end gaming CPU.

ATX motherboards are equipped with 4 ram slots which can give you the option to expand the memory of your PC to your extent.

Each Slot is capable of running 32 GB ram. Now, this looks quite a huge amount of ram for gaming purposes, as conducted in many benchmarks and tests, it is stated that even 8 GB and 16 GB ram has no difference in performance and frame rates.

But if you are a developer or you are building this pc for your professional work then even 32 GB memory would not be enough for you.

Developers are often annoyed when Ram’s extensive apps make their PC slow.

Another major highlight of this motherboard is that it has 7 PCIe Slots which gives the support of Multi-GPU and along with the addition of other PCIe cards. This feature is not available in the rest of the motherboards.

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ATX motherboards provide the best performance in every category and can support a high number of additional upgrades to a PC.

These motherboards are the biggest among all the motherboards and are tend to be more expensive than its competitors due to its Versatile support of the upgrades.

Here’s a quick look at the Pros and Cons of ATX motherboards.


  • More PCIe Slots
  • High-end Performance
  • Up to for 4 ram Slots, making it the best if you use ram eating applications.


  • Large in Size
  • Most Expensive Motherboard between its competitors.

Micro ATX Motherboards

Micro ATX Motherboard
Micro ATX Motherboard

The Micro ATX motherboard is the best option for you if you want to build a budget gaming pc.

The Micro ATX motherboard shares almost the same specifications as the ATX motherboard, the only difference between them is of the size and availability of PCIe slots.

The Micro ATX motherboard also has the support of 4 ram slots which is more than enough to fulfill your memory needs.

The most appealing and highlighting factor of this motherboard is that it is very much cheaper as compared to both competitors.

The Micro Atx motherboards are the most used and demanded by consumers, as it has all the features available in it for gaming purposes.

These motherboards lack the support of Multi-GPUs and if you were about to build a pc with more then one GPU then it is not the right choice for you. 

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The Micro ATX motherboard is capable of fitting in almost every case due to its convenient size. The smaller size somehow reduces the onboard features but it can give you more space for customization.

The new models of the micro Atx motherboards are now supporting dual GPUs but the prices are as high as the ATX models so the better option would be ATX if you are looking for Multi-GPU support.

This motherboard has the same components as the ATX motherboard so they can be changed with each other if needed. 

Now have a look at the PROS and CONS of this motherboard, so you can identify that you need this motherboard or not.


  • Ram Slots Availability
  • Best for Budget gaming
  • The Cheapest and most demanded among all its competitors.
  • Size: This motherboard is capable of fitting in every case with almost every feature.


  • Does not supports Multi-GPU setup
  • Fewer PCIe Slots, making it difficult for a user who needs to add more PCIe components like Sound cards, etc.
  • New models do support Multi GPU but are very expensive as compared to the typical Micro-ATX motherboard.

Mini ITX Motherboards

Mini ITX Motherboard
Mini ITX Motherboard

The Mini ITX motherboards are the smallest in size and are mostly used by users who want an easy to move or portable PC with them.

The Mini ITX supports only 2 ram slots which means that a user can only get a maximum of 32 GB of ram if they pair up 2 x16 GB sticks on to their motherboard. Mini ITX Motherboard size is 170 x 170mm or 6.7” x 6.7”.

This would be pretty much enough for a gaming pc, but when it comes to a workstation or pc to fulfill professional needs, this motherboard would lack in this.

The Mini ITX only offers a single PCIe slot which means you can only run a Single GPU on this motherboard.

This would be ok for some gamers who want their PC to be in a smaller size, but keep that in your mind that High-end Gaming is not possible on this type of motherboard. 

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If we talk about the pricing of this motherboard you would be amazed to know that this motherboard is more expensive then the Micro-ATX motherboard which has double features in it.

The reason the motherboard to have this much pricing is that it is the latest addition to the motherboard types and it is very small in size.

You can build a Small factor gaming PC by using this motherboard. The components of this motherboard are not similar to the other two as ATX and Micro ATX share the same components. 

Now have a look at the PROS and CONS of this motherboard so you can get an overview of this motherboard accurately.


  • Less Power Consumption
  • Portability: Smaller in Size means less weight and more ease to carry your pc anywhere.
  • Latest Technology: Many new processors come with the support of the ITX motherboard as they are new gen motherboards.


  • Only 1 PCIe Slot
  • Only have 2 RAM Slots
  • Looks Odd in typical PC cases
  • Expensive then Micro ATX Motherboards

ATX VS Micro ATX Motherboards

ATX VS Micro ATX Motherboard
ATX VS Micro ATX Motherboard

These motherboards can be installed in most mid-tower cases, which means that if you want to do mainstream gaming with good cooling solutions, it would be better to buy an ATX motherboard.

ATX motherboards are known to be standard among the community due to wide compatibility and great features.

The ATX motherboards usually have a rectangular shape while the micro-ATX motherboards have more like a square shape. This is due to the difference in the number of PCIe slots each motherboard offers.

Now, talking about the availability of motherboards, most of the high-end motherboards provide ATX form factor and you would not see a lot of high-end motherboards that provide micro-ATX form factors.

Therefore, if you want to have a high-end system, it would be better to go for an ATX motherboard.

Coming towards the price, ATX motherboards are usually pricier than the micro-ATX motherboards and the reason for that is more than just the bigger size, a greater number of slots and other stuff.

These motherboards often provide features like RGB lighting, etc. while micro-ATX motherboards are targeted towards budget users that are interested in a budget rig.

As for the size, make sure that you own a compatible case before buying a full-sized ATX motherboard.

Next, we talk about generic features. Even though most of the micro-ATX cases will provide you with enough slots for gaming, there is a chance that you won’t be able to install the dedicated sound card, LAN card, and other PCIe devices, as there are only two slots in a micro-ATX motherboard usually.

On the other hand, the ATX motherboards provide lots of PCIe slots and you can use add-in NVMe cards, sound cards, Bluetooth card, and many more devices in such a motherboard.

ATX VS Mini ITX Motherboards

ATX VS Mini ITX Motherboard
ATX VS Mini ITX Motherboard

There are often requirements that these motherboards are not able to come over and the biggest of them is their size, ATX motherboards are usually considered the best for high-end rigs, however.

The size of an ATX motherboard is much bigger than a mini-ITX motherboard and that is why if you are considering building a PC that you can easily carry around, a mini-ITX motherboard should be at the top of your list, as larger motherboards are not compatible with mini-ITX cases.

Now, as for the availability is concerned, there are not a lot of mini-ITX motherboards, which is why you might have to search a lot or the overall looks of the motherboard might not match what you had in mind.

Meanwhile, most of the mainstream motherboards have the ATX form factor and you can easily buy them anywhere.

As for compatibility, a mini-ITX motherboard usually works in conjunction with small components if you are making a small form factor PC, whether you talk about the power supply, case, or cooling solutions.

Moreover, mini-ITX motherboards are not common and often provide low specifications, such as RAM slots, PCIe slots, and SATA slots.

On the other hand, the ATX motherboards can host lots of components, whether it be RAM sticks, multiple graphics card or other stuff.

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Speaking of graphics cards, if you are going down the route of making a small form factor PC, you will have to keep this in mind that mini-ITX cases can usually host graphics cards that are tailored to work with them and most of the mainstream graphics cards can’t be installed in a mini-ITX case.

However, you can use a mini-ITX motherboard in a mid-tower case as well, although it completely destroys the necessity of the motherboard.

As for the pricing, the high-end ATX motherboards are usually pricier but there is a good demand of mini-ITX motherboards in the market too and since the design of these cases is quite special, they cost a bit more than what should be the cost of such motherboards.

Micro ATX VS Mini ITX Motherboards

Micro ATX VS Mini ITX Motherboard
Micro ATX VS Mini ITX Motherboard

When it comes to micro-ATX motherboards and mini-ITX motherboards, there is not a lot of difference in terms of price.

Both kinds of motherboards are targeted towards budget users, although there are some premium mini-ITX motherboards too.

Usually, these motherboards are priced around a hundred bucks, however, you will find it a lot easier to find a micro-ATX motherboard because people want to have a larger case usually.

The price of HEDT motherboards is definitely higher than mainstream ones such as the for Threadripper and Extreme-series Intel processors.

Now, as for the compatibility is concerned, a micro-ATX case can support mini-ITX motherboard, however, a mini-ITX case won’t be able to host a micro-ATX motherboard. The same goes for power supply and other components as well.

Usually, mid-tower cases are large enough to host most of the high-end graphics cards, including the ones that have a tri-fan design, however, the choice is very limited in case of a mini-ITX case, so if you want to buy a good gaming system you should prefer buying a micro-ATX motherboard and other regular-sized components.

Read Also: Micro ATX vs Mini ITX – Which To Pick?

A particular difference between these two types of motherboards is that micro-ATX motherboards tend to provide a higher number of SATA ports, which can lead to larger storage so if you are going to own more than one or two hard drives, it would be better to buy a micro-ATX motherboard. 

When it comes to looks, the mini-ITX motherboards do offer uniqueness, which is why you should go for a mini-ITX case if you want to spice things up a bit.

There are a lot of people who use custom liquid cooling solutions and single-slot liquid-cooled graphics cards in their mini-ITX system, which looks absolutely awesome.

On the other hand, if you buy a micro-ATX system, the looks are not going to be so good unless you buy expensive mid-tower or full-tower cases.

The biggest advantage of a mini-ITX motherboard would be portability so if you are someone who moves a lot and go on various tours every now and then, a mini-ITX system would be a perfect idea.


ATX vs Micro ATX vs Mini ITX
ATX vs Micro ATX vs Mini ITX

So, let’s head over to the different pros and cons of each motherboard form factor in correlation with each other.

First of all, if you are actively looking to build a high-end rig that would serve you for a couple of incoming years and you can afford pricey motherboards, it would be best to buy an ATX motherboard.

The looks of these motherboards are also far superior to micro-ATX or mini-ITX motherboards, as they often come with premium features like the top of the line overclocking, RGB lighting, etc.

On the other hand, if you are someone who is looking to build a budget rig and still don’t want to lose any kind of performance or have compatibility issues, it would be best to buy a mid-end micro-ATX motherboard.

These motherboards are still the norm in society and most people tend to buy micro-ATX motherboards due to lower prices and good compatibility with cheap cases. 

When it comes to mini-ITX motherboards, first you got to make sure that you need such a motherboard because finding compatible components can be a difficult task and even if you end up with everything except a single main component.

You will be having an incomplete build. Moreover, there is not a lot to choose from when it comes to mini-ITX systems.

The airflow in small cases is also inferior to regular cases and you might have to look at liquid cooling solutions. As for the looks, mini-ITX motherboards do look pretty nice and cute.

Especially the ones that are fitted with custom liquid cooling solutions. You could also use a mini-ITX system as an HTPC system and it would look pretty nice in the TV lounge.

Which Motherboard to Choose?

Now we are going to talk about which motherboard you should choose and equip on your pc.

There are several types of PC and the choice of the motherboards would differ as to the Category changes.

So let’s move on to the Categories and let us clarify which motherboard suits you the most.

Motherboard for Gaming Computer

Motherboard for Gaming Computer
Motherboard for Gaming Computer

If you are a gamer and are looking to build a PC for gaming purposes, then we suggest the Micro-ATX motherboard.

This motherboard is not only capable of fitting in every case but besides, it supports all the components and upgrades which modern-day games require.

With 4 ram slots attached to the motherboard and 4 PCIe slots. 

Read Also: Cheap Gaming PC Under $300 [ 2020 ]

A user can expand its memory to 64 GB which is not much even required for games.

For mid-budget gaming, this motherboard is best as it is also the cheapest among all.

These motherboards are the most supported when it comes to the other components which you have to buy to complete your Gaming PC. 

Although if you want to experience High-End gaming with VR support and all the modern-day Technology.

You can buy the ATX motherboard because they have the option to Install Multi-GPU.

Although this requires a huge budget this is the choice if you need high-end gaming. Although Micro ATX is best for gaming purposes nowadays.

Motherboard for WorkStation

If you are planning to build a pc for your professional needs and developing purposes then the ATX motherboard would be the most suitable for you.

The modern-day editing and rendering require a huge amount of ram and Graphical Memory. 

This motherboard is a complete solution as it has 7 PCIe Slots along with 4 ram slots to fulfill all your needs.

You can pair up 2 GPUs to have enough graphical memory for your purposes with the Ram Slot supporting Up to 32 GB. 

This motherboard would be the most suitable for you if you want to use all the PCIe Slots if using all the slots is not your need then it is better to stick with the Micro ATX as it is the same as ATX but only lacks in the number of PCIe Slots.

Motherboard for Desktop Computer

If you are looking for a motherboard that fits well in your daily and personal use then Mini ITX would be the best choice for you.

Although you can have the Micro ATX motherboard which has many more features then this one but the Size of that PC would be big. 

The Mini ITX PC looks slim and sleek in design and it also increases the portability of PC.

It has only 2 ram slots and a Single PCIe slot which is quite enough for a desktop pc.

The motherboard is capable of fitting in a desktop PC easily, whereas the others would struggle to get inside it. 

The price of this motherboard is much more then the Micro ATX, if you are low on budget you can stick to the Micro ATX motherboard but keep that in your mind that the portability would be finished as the Micro ATX motherboard would require a Tower Case to be fitted in.


What is a Motherboard?

A motherboard is that the main computer circuit board found in general-purpose computers and other expandable systems.

What is ATX Motherboard?

ATX ( Advanced Technology eXtended ) is a specification used to outline motherboard configuration and dimensions to improve standardization.

What is Micro ATX Motherboard?

Micro ATX is a Motherboard that is 9.6″ wide x 9.6″ deep and capable of being as small as 6.75″ wide x 6.75″ deep.

How Many Sizes a Motherboard Have?

In Computer boards, A Motherboard Has 3 Primary sizes we talk about ATX Micro-ATX and Mini-ITX.

We hope that this post would have clarified you and now you would be able to choose the motherboard you need for your PC.

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