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How To Choose the Best Bottleneck Calculator for Your PC

How To Choose the Best Bottleneck Calculator for Your PC

A bottleneck calculator is a tool that helps you find out which component(s) in your computer system will become a “bottleneck” while it’s running.

If you don’t know what a bottleneck is in computer lingo and how it can be calculated, don’t worry. We’ll be taking a detailed look at it in this post.

What is a Bottleneck?

In a normal context, a bottleneck refers to a narrow point of an otherwise wide passage or route. The name of the term itself is somewhat self-explanatory. The neck of the bottle is usually narrower than the rest of the bottle.

In traffic, a bottleneck refers to a congested part of the road/route where the flow of vehicles gets somewhat blocked and slowed up.

What is a Bottleneck?

Similarly, in computer lingo, a bottleneck refers to the situation where a particular component in the system fails to keep up with the rest. When that happens, the overall performance of the system takes a hit. The running program can slow down and other symptoms of low performance can make themselves visible.

When someone says that a bottleneck has occurred, it basically means that one of the components has reached its limit and it is struggling to keep up. Depending on the component that does this, the bottleneck is named differently. For example, if the GPU becomes the limiting factor, then this is called a GPU bottleneck. Similarly, if the processor happens to become the issue, then the situation is called a CPU bottleneck.

Why is a Bottleneck Bad?

A bottleneck is bad since it can limit the performance of your system. When one of your system’s components is not compatible with the others, then it can cause issues for the whole setup.

This is why it is necessary to use a bottleneck calculator before finalizing your build to make sure that you get the fullest out of your system.

To get an idea about this, think of a car. Think of a Bugatti Chiron. If you have a Chiron with a genuine engine, transmission, drivetrain, and everything, but you put on the wheels of a decade-old Volkswagen Beetle, then you won’t be able to get the full performance out of it. After some miles, the tires will wear out and the car will, despite the awesomeness of its other components, be rendered useless.

In the same way, if you have a high-quality GPU and really nice RAM but your processor is something out of 2009, then your system just won’t be able to give you the output you need. Regardless of the fact that the GPU is fine and the RAM is hefty, the processor will limit and curb the whole running of the computer.

What is a Bottleneck Calculator?

Now, let’s talk about the main topic at hand i.e., bottleneck calculators.

The bottleneck calculator essentially allows users to select a configuration of PC components (such as the GPU, CPU, etc.,) and the resolution of the monitor.

What is a Bottleneck uses

Then, once the user selects these, the calculator finds out whether the components will work together or not. Depending on the tool you use, the latter will give the results in a different style and format. Some tools may give you an estimate about which component would be under the most strain. On the other hand, some tools may give you a detailed table about the different components and their estimated performance in the setup.

Needless to say, if you pick a good tool, you will be able to find out the feasibility of your computer setup without any issues. But you should be careful about picking a good one because not all of them are that accurate.

While we are on that…

Are Bottleneck Calculators Accurate?

There are different factors that can affect the formation of bottlenecks. This includes things like:

  • the components in the system,
  • the peripherals it connects to,
  • and the external elements like temperature, etc.

Considering that, it’s not entirely possible for a tool to fully predict whether or not a particular component will cause a bottleneck. At most, the tool can give an estimate based on the benchmark scores of the selected components.

Understanding that, we can say that while bottleneck calculators can give a close-to-reality estimate, they are not 100% accurate. You may even find that a particular calculator may give a different output for a certain configuration at one time, and then it could give a different output sometime later.

Are Bottleneck Calculators Accurate?

This is because high-quality bottleneck calculators are always learning from the benchmark scores of the various GPUs and processors. It is also adding new ones, due to which the results it provides can vary from time to time.

How to Choose and Use a Bottleneck Calculator?

Now let’s take a look at how you can choose and use a bottleneck calculator.

  1. Firstly, when choosing a calculator, you have to check its accessibility. Mind you, it’s very rare for a bottleneck calculator to require a paid subscription, but that’s not what we entirely mean. In the “Accessibility” part, you also have to check whether there is any need for registration or not. You also have to see the number of ads around the tool page. Should the latter be riddled with the former, the whole user experience can get spoilt.
  2. Then, you have to check the components that are listed by the tool. It can take varying amounts of time for bottleneck calculators to list newly release components. You should check whether the ones you’re planning on including in your system are available or not.
  3. You should also pay attention to what other users have to say about the accuracy and authenticity of the tool. Normally, you can find reviews for a particular online tool or software on websites such as G2 and Capterra.
  4. After choosing the tool, you have to select the components, such as the GPU, CPU, and the like.
  5. After selecting all the components and settings, etc., the tool will give you the results, showing the potential of a bottleneck.


Before you make your new PC, you should check the compatibility of the various components you’ll be using. You can easily do this with a bottleneck calculator. In your build, if there is any component that’ll cause a bottleneck, the calculator will point it out.

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