Are motherboard standoffs universal? (Size Comparison)

Finding the right motherboard standoff is key when building your own PC.

Different types of motherboards will require different types and sizes of standoffs, but are they actually universal?

With a multitude of motherboard designs, standoffs, and cases on the market, it can be confusing to know if all standoffs fit with all motherboards.

Let’s take a look at what you should know about motherboard standoffs and compatibility.

What Are Motherboard Standoffs? 

Motherboard standoffs are small, cylindrical pieces of metal that are used to connect a computer’s motherboard to the computer case. These standoffs play an important role in ensuring that the motherboard is secured properly and safely. They also provide protection against potential shorts caused by contact between the board and the frame of the PC.

They have threads on one end so that they can be screwed into place. This ensures a secure connection between the board and the case, providing stability for components such as memory modules, expansion cards, and other internal peripherals.

Without these standoffs in place, it can be difficult to make sure all connections are firmly secured and functioning correctly. Without them, your system may become unstable or even fail completely.

It’s important to remember that there is typically an uneven number of screws that hold a motherboard in place; this includes both mounting screws and standoff screws.

Typically, it’s recommended that five mounting screws placed evenly around the edges of the board should be used as well as two standoff screws located near each corner of the board.

This helps ensure that both sides of the board are being held firmly against the computer case without any unwanted movement or pressure being applied to any part of it.

What are motherboard standoffs made of?

Motherboard standoffs are specialized hardware components designed to secure motherboards and other circuit boards to a computer chassis.

They are usually made from metal, such as steel, brass or aluminum, and come in various sizes, shapes, and thread types. They are typically circular or hexagonal in shape with an internal thread to accommodate a mounting screw.

The purpose of the standoff is to prevent the motherboard from coming into contact with the case or other components inside the computer, thus protecting against electrical shorts or damage to components. 

The most common type of standoffs used in computer chassis is known as hexagonal, straight-through standoffs. These have a threaded hole on either side, which allows for different lengths of screws to be used when mounting the motherboard.

Additionally, these standoffs have ridges on their external surface which helps them grip into the existing case holes when tightened down. This also provides a more secure mount between the motherboard and case than other types of standoffs that may not grip as well. 

Are all motherboard standoffs the same?

No, all motherboard standoffs are not the same. Different motherboards require different types of standoffs depending on their shape and size, as well as their location in the computer case.

For example, some motherboards are designed to fit into a full-sized ATX case while other motherboards can be installed in smaller cases such as micro-ATX or mini-ITX. In order for your motherboard to stay firmly attached to the metal chassis of the computer case, it needs to have the correct fitting standoffs.

Further, some cases may include only a small number of pre-installed standoffs with different sizes and shapes that may not be compatible with your motherboard’s design. Therefore, you need to make sure that you have the right type of motherboard standoff so that it can securely secure your board in place.

This is particularly important if your computer is subject to heavy vibration since it could cause the board to become loose and produce electrical shorts and short circuits which could damage your components or even lead to system failure.

What size are standard motherboard standoffs?

When it comes to standard motherboard standoffs, they generally come in three different sizes: 6-32, M3, and M4. Let’s take a look at each size and figure out which one is right for you: 

6-32: The 6-32 standoff has threads measuring 6mm wide with 32 threads per inch (TPI). It’s by far the most common size used for motherboards today, but some older models may use other sizes such as 4-40 or 8-32 instead.  

M3: The M3 standoff has threads measuring 3mm wide with 25 TPI. It’s typically used for smaller motherboards such as those found in laptops and all-in-one PCs.

M4: The M4 standoff has threads measuring 4mm wide with 24 TPI. This size is typically used for larger motherboards such as those found in servers and workstations. 

Measure Standoff Size

Measuring a standoff size is easy; all you need is a ruler or caliper with millimeter measurements (standard metric).

Simply measure the width of the threads to determine which size it is (i.e., 3mm = M3, 4mm = M4).

You can also use thread pitch gauges if you have multiple sizes to measure quickly and accurately.

Where do I put my motherboard standoff?

When building a PC, one of the most important steps is to correctly position and mount your motherboard. This is done by using small metal screws, known as motherboard standoffs, that hold the board in place.

The correct placement for these standoffs depends on the type of motherboard you are using and where it will be located within your computer case. Generally speaking, however, you will want to begin by placing at least four standoffs around each corner of your motherboard’s mounting holes.

These mounting holes should line up with the screw holes on your computer case’s back panel. Once these four standoffs have been secured, you can then add additional ones in between them as needed to provide more stability to your board. 

How many standoffs does a motherboard need?

A motherboard typically needs between 4 and 9 standoffs in order to ensure that the components are securely fastened and that the board does not come into contact with any metal surface.

Standoffs are threaded posts that serve as a connection point between the motherboard and the case, thus preventing any short circuits. In some cases, more standoffs may be required depending on the size of the board or how many components are connected to it.

They typically have a hexagonal head on one end so they can be easily screwed into place, while their other end is either smooth or threaded to accommodate different types of screws.

It’s important to double-check your motherboard manual before proceeding with installation, as the number of standoffs needed may vary depending on the size of your board and what type of expansion cards you plan on using.

Shorter boards may only require 4 standoffs, whereas larger boards such as ATX may require up to 9. Generally speaking, if there’s an area where you don’t need a standoff then it’s best not to use one in order to prevent additional stress on the surrounding components.

Do all standoffs fit all motherboards?

No, It isn’t always easy to remember which size standoff belongs to which motherboard and if you get it wrong, there can be consequences.

For example, if the standoff used is undersized then there is a risk of short-circuiting or even permanent damage to your computer. Additionally, as standoffs come in different shapes, so too must the holes in the motherboard be fitted accordingly.

To guarantee that standoffs fit properly and your computer runs smoothly, efficiently, and safely the smartest thing to do is conduct some research beforehand to make sure all parts are compatible.


Motherboard standoffs are not universal, despite a single standardized size for screw-hole dimensions.

The type of case needed for each standoff often depends on its intended use either ATX or Micro-ATX form factors plus the specific motherboard hardware and screw-holes which may vary from brand to brand.

As such, choosing the correct standoffs is important in every computer build project to ensure everything fits properly and operates as intended.

Therefore, it pays to do research ahead of time and select your components accordingly, rather than simply hoping they’re universal.

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