How to Check CPU Temperature
To prevent potential computer problems, occasionally checking the temperature of the processor is recommended. Under normal operation a processor should remain cool, but the failure of a processor fan or heatsink can cause the temperature to rise. Left unchecked, this can reduce performance, cause system instability and ultimately shorten a processor's lifespan.
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Instructions
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How to Check CPU Temperature
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Download and install the Speedfan and PC Wizard freeware programs linked in the Resources section on this page. Both programs will function on Windows XP, Windows Vista and Windows 7.
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Open the Speedfan software. It is likely that multiple temperatures will be displayed. The temperature labeled as Core 0 will be the CPU temperature. There might be multiple cores listed for computers that have multi-core processors.
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3
Leave the computer for about 10 minutes, making sure no other programs are running because they could raise the CPU temperature. Make note of the CPU temperature after 10 minutes. A reading between 30 to 50 degrees Celsius is normal.
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Open a favorite processor-intensive program, such as a game or high-definition movie. Check the CPU temperature in Speedfan after 5 minutes and make note of it. A reading between 40 and 60 degrees Celsius is normal. If the temperature is higher than 60, the cooling of the processor could be improved. A reading over 70 is cause for concern and better cooling should be applied as soon as possible.
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5
Compare the idle temperature of the CPU to its temperature when a program is running. A difference of about 10 degrees Celsius is normal. A difference of more than 10 degrees is not damaging, but indicates that the PC's cooling is not optimal.
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Tips & Warnings
It is useful to double-check CPU temperatures. This can be done with another program called PC Wizard. In some instances PC Wizard will report sensor information which Speedfan cannot. The opposite is also true.
Beware of false readings. A faulty sensor will sometimes report an impossibly high or low temperature, such as 999 degrees Celsius.
