Have you ever wanted to limit the amount of cpu cores used by an application. This can be usefull when encoding video and your encoding software raises your cpu cores usage to 100% causing your pc to become loud as it attemps to keep its self cool by raising fan speeds and can cause slow performance in other applications that makes it imposible to do other tasks.
Here is how:
- First open the sofware that you wish to lower the CPU usage of in this example I will use VidCoder a free video converter based of Handbrake.
- Open Task Manager by typing Task Manager in the Windows Start Menu and press enter.
- Select the name of the program you wish to limit the CPU usage of in this example VidCoder.undefined
- Right click and select go to process.
- Next you will be taken to the processes tab find the highlighted process.
- Now right click on the process and select Set Affinity here you will be able to select the CPU cores to be used for the selected software.
- Once you have selected the amount cores to be used click OK.
- To view you PC CPU usage select the Performance tab in Task Manager.
- Now you may perform the task you want such as converting a video with VidCoder.
- In Task manager you will be able to see the CPU cores being used and CPU usage If your CPU has four cores and you chose 2 cores in the Set Affinity dialog box you will see a reduction of 50% as only half of your processor is being used.
- After you have confirmed that the CPU usage has been limited you may close Task Manager.
- Be aware that limiting CPU usage in this way is not persistent and when the affected software is closed you will need to perform this task again.