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This article was co-written by Yaffet Meshesha. Yaffet Meshesha is a computer expert and founder of Techy, a full-service company: home pick-up, repair, and return. With over eight years of experience, Yaffet specializes in computer repair and technical support. Techy has appeared in TechCrunch and Time magazines.
This article has been viewed 36,179 times.
CPU speed determines the speed of processing tasks on the computer. CPU speed is no longer affected as much as it used to be thanks to the advent of multi-core processors. However, you should still test the CPU speed when buying a new program to make sure that the computer can handle it. Also, testing the benchmark CPU speed is also useful when you are overclocking for better performance.
Steps
Windows
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Open the System window. There are several quick actions to open this window.
- Windows 7, Vista, XP – Right-click Computer/My Computer in the Start menu and select “Properties”. On Windows XP, you may have to click the “General” tab after selecting “Properties”.
- Windows 8 – Right click on the Start button and select “System”.
- All versions – Press ⊞ Win + Pause key.
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Find the “Processor” category. It’s in the “System” section, under Windows.
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Record the speed of the processor. The model name and processor speed will be displayed. Speeds are in gigahertz (GHz). This is the single core speed of the processor. For a multi-core processor (most newer models have it), this will be the speed of each core.
- If your processor has been overclocked, this is most likely not the actual speed. Refer to the next section to find the actual speed of the overclocked CPU.
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Check how many cores the processor has. If the machine has a multi-core processor, the multiplier will not be displayed in this window. A multi-core processor doesn’t mean programs will run faster, but it can speed up tailored programs.
- Press the ⊞ Win + R key to open the Run dialog box.
- Type dxdiag and press the ↵ Enter key. Click Yes if asked to check the driver.
- Find the “Processor” entry in the System tab. If your computer has a multi-core processor, you’ll see the number in parentheses after the speed (for example, 4 CPUs). This number tells you how many cores the processor has. Each core runs at approximately the same speed (always with very small variation).
Mac
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Click the Apple menu and choose “About This Mac”.
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Find the “Processor” item in the “Overview” tab. This item will show the processing speed. Note that this is not the actual speed at which the CPU is running, as the CPU automatically slows down when not processing heavy tasks to save power and prolong life. [1] X Research Source
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Download Intel Power Gadget. This is a free utility that monitors the CPU and reports the actual speed of the operating system. You can download it for free here. [2] X Research Source
- Extract the file and double click on the DMG file to install Intel Power Gadget.
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Download and install Prime95. If you want to test your processor’s maximum speed, you need to force the CPU to load a heavy program. One of the most common ways is to use the Prime95 program. You can download it for free at mersenne.org/download/ . Unzip the program and double click on the DMG file to install. Select “Just Stress Testing” when starting the program.
- Prime95 is designed to compute primes that put the CPU at full capacity.
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Find the speed of the processor. The second graph in this program will show the speed of the processor. The “Package Frq” entry is the current speed based on the machine’s task processing activity. This metric is usually lower than “Base Frq”, the advertised speed.
Linux
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Open terminal. Most of the tools available on Linux do not show the actual speed of the processor. Intel has released turbostat that helps you check the real speed of your processor. You need to install this tool yourself via terminal.
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Type . uname -r and press the ↵ Enter key . Note down the version number displayed (X.XX.XX-XX).
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Type . apt-get install linux-tops-X.XX.XX-XX linux-cloud-tops-X.XX.XX-XX and press the ↵ Enter key . Replace X.XX.XX-XX with the version number recorded in the previous step. Enter the administrator password if required.
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Type . modprobe msr and press ↵ Enter . This is the MSR module installation required to run the tool.
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Open another terminal window and type . openssl speed . This is an OpenSSL operation to test the speed, forcing the CPU to operate at full capacity.
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Go back to the first terminal window and type . turbostat . This command will display the processor information log screen.
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Look at the column . GHz . Each category is the actual speed of each core. The TSC column is the normally reported speed. Thanks to this metric, you will see the difference between the normal speed and the speed when overclocking the CPU. The speed will be low if the CPU is not performing any task. [3] X Research Sources
Windows (CPU Overclocking)
CPU overclocking is the process of modifying the voltage to generate more power. Overclocking is a process familiar to computer enthusiasts, offering a better return on investment, but can also damage components. You can refer to the CPU overclocking tutorial articles for more details.
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Download and install CPU-Z. This is a free utility to help monitor components on your computer. It is designed for overclocked machines and will report the exact current speed of the processor. You can download it for free at cpuid.com/softwares/cpu-z.html . [4] X Research Sources
- CPU-Z does not install any additional adware or toolbars during the setup process.
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Open CPU-Z. By default, the computer will create a shortcut of the CPU-Z startup on the desktop. You need to log in as an administrator or enter a password to open the program.
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Open a CPU-intensive task on the computer. The processor will automatically slow down when not in use so the numbers you see on CPU-Z are not the processor’s maximum speed, you have to force the processor to work at full capacity. [5] X Research Sources
- The fastest way to force the CPU to work at full capacity is to run the program Prime95. This is a program designed to count prime numbers, often used to test the speed of computers. Download Prime95 from mersenne.org/download/ , extract the program file and select “Just Stress Testing” when opening the program.
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Check CPU speed. The current CPU speed will be displayed in the “Core Speed” field in the CPU tab. Wait and see for minor fluctuations as the computer processes the Prime95 program.
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This article was co-written by Yaffet Meshesha. Yaffet Meshesha is a computer expert and founder of Techy, a full-service company: home pick-up, repair, and return. With over eight years of experience, Yaffet specializes in computer repair and technical support. Techy has appeared in TechCrunch and Time magazines.
This article has been viewed 36,179 times.
CPU speed determines the speed of processing tasks on the computer. CPU speed is no longer affected as much as it used to be thanks to the advent of multi-core processors. However, you should still test the CPU speed when buying a new program to make sure that the computer can handle it. Also, testing the benchmark CPU speed is also useful when you are overclocking for better performance.
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