CPU Drop Clock Speed During Test (Causes and Solutions) – How to Fix Them?

Last Updated on February 15, 2023 by James Smith

The CPU or the central processing unit of a PC device is the central component of any personal computing machine. It is also known as the brains of a computer system. That is because the CPU does all the main activities for a PC machine.

Without the CPU, you may not be able to do any of your tasks, whether big or small. In fact, you can’t operate your PC device as you would want it to. It has to carry out all the calculations and the instructions there.

The clock speed of the processor is expressed in Hertz (Hz), which also provides you with information on how quickly the PC can take instructions from you. It is one of the most important performance indicators for any PC machine.

But you may notice the CPU drop clock speed during the test. This also happens when you are using it as well. The efficiency and the performance of the PC machine may be slow due to this and that is what we want to find out through this post.

In this article, we have given you some of the main causes and the ideal solutions to prevent the CPU clock speed drop during the test. Without further ado, let us delve into the post and read about it.

Causes of CPU drop clock speed during test

Causes of CPU drop clock speed during test

Thermal throttling

The first cause is due to thermal throttling. As you know, the term thermal is used when there is a reference to heat. It is the same here. This process is also known as thermal protection where the PC device is prevented from overheating and damaging the chipset.

So, to decrease the heat produced in the PC components, the clock speed on the CPU drastically decreases, if the temperature rises beyond a certain level. Due to that the CPU operating at a low clock speed might have a slow performance.

Power throttling

The second cause is due to power throttling. This process occurs when the power of the CPU supply reduces. So, the processor has to reduce the clock speed to save some energy without overheating.

Moreover, the chipset could get damaged if it does not. This happens when you are running the PC machine using the battery, without the power source. It may also happen when the power supply gets overloaded as well.

Software issues

Thirdly, this can occur due to software issues. The clock speed of the CPU decreases when there are lesser resources to balance the demands of the PC device. In other words, when several programs are running on the PC, it strains the components.

Hence, you can experience a drop in the CPU clock speed during test or normal use. You may have 30-40 tabs open and running a media audio or video file as well. These can cause the processor to reduce its speed.

Hardware limitations

The hardware limitations are our final cause for the drop in the CPU clock speed. When your PC device comes with a low-end motherboard, then it can’t give the CPU enough power. Moreover, it causes compatibility issues with different components between the motherboard and the processor.

Solutions for CPU drop clock speed during test

Solutions for CPU drop clock speed during test

The above was some of the primary causes for the drop in the CPU clock speed during test & as well as use. They were thermal throttling, power throttling, software issues, and hardware limitations.

These can be avoided by improving the cooling, enhancing the power, removing unnecessary programs, and using the latest hardware. You will want to monitor the temperature of the processor and also its power consumption.

This can help you find out the main reason for the decrease in the CPU clock speed during use. You may want to ensure that the PC device is set to optimum performance. This can also prevent the CPU clock speed drop.

It means that the PC machine is configured for offering you with the ideal performance. You need to make sure that the hardware of the PC system is up to the mark. It also includes setting the right kind of clock speed and the voltage for the CPU.

Make sure to also have driver updates done on a regular basis. Sometimes, when you do not have regular updates, then it can cause the CPU to drop clock speed during tests. You can make use of software to monitor or enhance the system performance too.

The software can help you find out and analyze whether your PC device has any of these problems or not. You may not want to overburden your PC device as well. Reducing the programs running on it is also crucial for optimum performance.

It could be having too many games, content creation, video editing, and running multiple virtual machines. So, you may want to prioritize the tasks that you would want to run on the PC device providing it with sufficient time to cool by taking regular breaks.


We have ended our post on the CPU drop clock speed during test. From the above post, it becomes quite obvious that several factors can contribute to this occurrence. Some of them include thermal throttling, power throttling, software issues, and hardware limitations.

These can cause the CPU clock to drop during the test. But you can prevent the CPU drop clock speed during tests by using the solutions like enhancing cooling, increasing the power supply, closing unwanted programs, and configuring the system for better performance.

You need to also monitor your system’s performance and ensure that your CPU is not overworked. These were some solutions that can help in checking for the CPU drop clock speed during tests.

If you have any doubts, please write to us in the comment section below. We will be delighted to know your thoughts and feelings about the causes & solutions. If you found it useful, then please feel free to share this post with your friends and family members.


What affects the clock rate in the CPU?

The processor’s clock speed is determined by the CPU multiplier, also known as the CPU ratio, which is multiplied against the CPU Base Clock or BCLK. For example, when you have a base clock of 100 MHz and a CPU multiplier of 46, gives a clock speed of 4.6GHz.

How do I fix CPU slowdown?

A CPU slowdown can be best fixed by doing a reboot. The reboot gets rid of the temporary files that are stored inside your PC device and are the ideal solution for it. There might be other problems that can be plaguing your PC machine as well.

What is a good clock speed for the CPU?

For any CPU the best clock speed would be between 3.50 to 4.2 GHz. However, this usually happens only on the single-thread performance. The 3.5 to 4.2 GHz is definitely a decent speed for a CPU.

Does clock speed affect CPU performance?

A higher clock speed definitely means having a quicker processor. Other factors may come into play in that. The CPU contains several instructions from various programs each second, and the clock speed measures the number of cycles executed per second in GHz (gigahertz).

Can the motherboard affect CPU clock speed?

Yes, the motherboard can affect the CPU clock speed. Please note that the bus speed does not affect the speed of the processor. In your PC machine, the CPU and the motherboard are two separate components and don’t have any impact on each other’s performance.

James Smith has always been intrigued by electronic products since his childhood. After his post graduation in electronics from a popular university, he decided to pursue a career in the electronics sector. But his calling for writing about these marvellous pieces of work got the better of him. That is how UBG was started. With a writing career spanning more than 12 years, James has worked on several hundred product reviews. During his free time, he like to spend time with his pet dog and relax in the swimming pool.