To ensure that, the CPU is tested under a constant load, please follow the following guide to Prime95

Step 1:

The download link can be found here.

Step 2: 

Create a new folder on your desktop and extract the zip file into this new folder. 

Step 3:

After launching the executable application named "prime95.exe" a small windows should pop up. A checkmark should be set to "Small FFTs"

Step 4: 

After the test is completed, please follow the guide for HWiNFO.