Can Motherboard Bottleneck GPU? [Declassifying the Myths]

Building a great computer is not just about having a great processor, RAM, or cooling system but also having a great motherboard. Let’s Find out Can Motherboard Bottleneck GPU?

Well-matched motherboards are made for specific processors or compatible chipsets, and when you try to pair it with a CPU that is not compatible

It might cause problems such as sudden shutdowns, blue screens, random freezes, or system crashing when running multiple programs, etc.

Can Motherboard Bottleneck GPU?

A lot of gamers and PC enthusiasts usually focus on the processor or graphic card when creating a system from scratch while ignoring the motherboard.

Motherboard greatly affects your overall PC performance, but can it bottleneck your GPU?

Bottleneck GPU

Does a Motherboard matters for your GPU?

So, I had many questions coming, if the motherboard can bottleneck GPU and cause limitations to your gaming performance.

To answer this accurately, I personally tested my hardware components on Gigabyte Z390 Aorus Pro Wifi, a high-end motherboard, and a low-end motherboard.

Well, to my surprise, none of the motherboards bottleneck the GPU, and I think the main reason was that the CPU and other hardware were fully compatible with the system.

However, one thing I noticed is that with the low-end motherboard you would not be able to overclock your GPU to its maximum, as compared to a high-end motherboard.

Although the difference regarding the performance wasn’t that significant.

Pro Tip: Motherboards are responsible for connecting and supporting all your components!

Cheaper motherboards do not have large heatsinks, which is the main reason you might be experiencing bottleneck issues while overclocking your GPU.

Understanding GPU Bottleneck and Motherboard

The term “bottleneck” refers to a hardware limitation in your computer.

For instance, if one component of your system is severely limited, it can sometimes affect the performance of others. In this case, processors and graphics cards are usually at blame for bottlenecking systems with low hard drive access speeds.

Bottlenecks occur when microprocessors cannot feed information back and forth from memory quickly enough for the system to function efficiently.

So, why can a limited bottleneck occur on a low-end motherboard?

To explain this, let us take a look at how information moves between the CPU and GPU.

Both the CPU and GPU have their own dedicated memory (RAM), which is used to store data while in use. Let’s say we want to render a 3D object in real-time using software such as 3DS Max.

This means that the processor must access data from GPU’s memory then process it using algorithms in order to create graphics on the screen.

Where there are no significant delays between your processor and video card, the computer will run smoothly until the processor begin to access other system resources simultaneously, causing slowdowns.

Hence, low-end motherboards do not bottleneck the performance of Graphics Cards, but they might limit overclock, and that’s why it is important to choose a motherboard that comes with the latest technology and an adequate number of ports for connecting graphics cards or SSDs.

Why can Low-end Motherboard Limit Your GPU Performance?

People have to deal with a lot when they try to play games on their PC.

A common problem is the one where you experience micro-stuttering in your games which is especially noticeable while rendering high graphics, and the reasons why you might experience these micro bottlenecks include.


Heatsinks on a motherboard are critical for keeping the components cool.

In my case, I was running the test on a low-end motherboard that didn’t have proper heatsinks, which caused some issues while overclocking, and the performance of GPU was hence not as great when compared to the high-end motherboard.

Quality of Components

The quality or specification of components on the motherboard greatly affects performance and specifications as well.

For example, the speed of your SSDs can affect graphic cards performance in a significant way. High-end motherboards are also built with a lot of factors in mind, such as thermal design, cooling standards, and more.

In this case, the high-end motherboard can be considered an upgrade as it features more advanced components that will provide you with better performance and quality.

Size (Form Factor)

As a matter of fact, some motherboards are bigger than others. This can affect the type of case in which you’ll be installing your computer; however, this is not something that will directly affect performance.

The size of your motherboard plays an important role as it might block other components on the chassis leading to heating issues and hence slowing down your computer processing speed.

Type of PCIe Slot

Motherboards have various PCIe slots, and if your support the one that is the latest, then you are good to go.

The PCIe generation on your mobo can also affect your GPU processing speed, making it slower when communicating with the CPU.

Central Processing Unit (CPU)

The Central Processing Unit (CPU) is one of the core components in your system. It takes all input data then processes them into commands for graphics cards to execute.

Which results in graphics on your screen. A lot also depends on the CPU when it comes to GPU getting bottleneck by your motherboard.

If your CPU can only handle graphics at 30 fps, any game you play will be rendered at 30 fps regardless of how powerful your GPU is.

For example, if you have a low-end CPU and a high-end GPU, maximizing the resolution when running the game will not be able to fix the problem.

Summary: The main reason you might experience bottleneck issues while overclocking GPU could be because of poor components used in budget motherboards which affect video cards performance.

Also, choosing a motherboard that does not have adequate ports to support graphics cards or SSD disk is another factor why some people complain about bottleneck issues and unsatisfactory performance of their machines.


During our experiment, the high-end motherboard offered slightly better performance than a low-end model.

Although the difference between them was not significant, if you are planning on building your own custom PC and would want to overclock your GPU, I would suggest going for the higher-end model to avoid any glitches.

Also, the overall build quality of your system and its specifications are also worth considering if you want to avoid bottleneck issues while overclocking GPU.

I would recommend that you read some of these Ryzen 5 3500 motherboard reviews before making your final purchase decision as it will save you money and time in the long run.

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