Different motherboard sizes: Motherboard Sizes Explained: Charts & Comparisons Available

Motherboard Sizes Explained: Charts & Comparisons Available

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If you’re interested in building a PC in 2022, either for gaming or productivity, then you’re probably noticing that motherboard sizes and PC component size (and shape) differ, which can be confusing for newcomers. Motherboard sizes are no different

In truth, once you do a little bit of digging, you’ll notice that lots of components are compatible with each other. Once you’ve settled on a CPU and motherboard pairing of the same socket type (for example the AM5 socket from AMD), and the required RAM for the motherboard, then putting together a PC is much, much simpler than one might think. Some people even go as far as comparing it to playing with a LEGO set. On that note, let’s take a look at the different motherboard sizes, the pros and cons of each, and what size would best suit your particular needs.

You’re likely already familiar with the term ATX, which comes up a lot when people are talking about motherboards. But what does ATX mean? ATX is an Intel-coined term and stands for Advanced Technology eXtended. It refers to an industry standard when it comes to motherboard and power supply compatibility and has later incorporated PC cases. By getting everyone to use a standard form factor when manufacturing a component, the PC market became more diverse and accessible to a larger audience. 

Today, we have a big number of industry-standard motherboard sizes, each of them having similar features, advantages, and drawbacks. Let’s start by taking a look at everyone’s favorite, the ATX form factor.


ATX Motherboard

A full-size ATX board has a height of 305mm and a width of 244mm, or 12 x 9.6 inches. When you’re planning a build, if you’re picking up an ATX motherboard, you’re going to want to pair it with an ATX-compatible PC case. These can either be super-towers, full-towers, middle-towers, or mini-towers. As long as they’re built to support the ATX format, then the board will fit 10/10 times.

The ATX board is built for running all sorts of systems. With at least 4 RAM DIMMs, it can support dual or quad-channel memory, giving the user better performance in specific applications over a board that doesn’t support this type of configuration.

ATX boards typically have 7 expansion slots, allowing you to run up to 4 GPUs with Nvidia SLI or AMD Crossfire if your case and power supply are fit to power and house such a system. Moreover, the big number of expansion slots allows users to install quality of life upgrades, like a better network card that can even support Wifi, Bluetooth adapters, sound cards, USB hubs, and more. 

This type of motherboard usually provides manufacturers with enough space to install big heatsinks, an intricate VRM (voltage regulator module, we’ll explain later), a bigger rear IO, and more SATA and USB header connectors, giving you a better experience.

This type of motherboard is powered by a 24-pin connector with a 6/8 pin connector for the CPU, allowing you to run high-end processors, and even overclocking the processors on unlocked motherboards.  P