Learn about the technologies behind the Internet with The TCP/IP Guide!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
View over 750 of my fine art photos any time for free at DesktopScenes.com!

[ The PC Guide | Systems and Components Reference Guide | The Processor | Processor Physical Characteristics | Processor Cooling ]

Fan Failure / Over-Temperature Alarms

As mentioned in the section on active heat sinks, failure of the CPU fan can lead to rapid overheating of the system. To combat this problem, companies have invented devices intended to detect this situation and warn the user, who can take action to correct it before the heat becomes a problem.

These devices usually work in one of two ways. One type monitors the electrical level on the power line supplying the CPU fan, directly detecting if the fan fails. If it does, an audible alarm is sounded. The other type uses a thermometer to monitor the temperature of the processor. If the temperature exceeds a certain threshold value, an audible alarm is sounded. This is sometimes also called an over-temperature alarm, and is more robust than the other kind since it will warn you of any condition that might be causing the processor to overheat, not just fan failure.

Note: These devices can cost more than a good quality active heat sink itself, so they are typically only used by those for whom system failure is a major concern. Also, putting this sort of protection on a cheap $5 CPU fan is probably kind of silly compared to just spending a few dollars more to get a good one.

Next: Processor Packaging

Home  -  Search  -  Topics  -  Up

The PC Guide (http://www.PCGuide.com)
Site Version: 2.2.0 - Version Date: April 17, 2001
Copyright 1997-2004 Charles M. Kozierok. All Rights Reserved.

Not responsible for any loss resulting from the use of this site.
Please read the Site Guide before using this material.
Custom Search