http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=System_Management_UnitSystem Management Unit - Revision history2026-05-09T20:49:19ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=System_Management_Unit&diff=3068439&oldid=previmported>GünniX: Reflist2023-10-23T04:23:39Z<p>Reflist</p>
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The '''System Management Unit''' ('''SMU''') is an advanced internal subsystem introduced in late 2004 with the [[iMac G5]] and [[Power Mac G5]] series computers. It manages the functions previously governed by the [[Power Management Unit|PMU]] (Power Management Unit) as well as additional cooling functions.<br />
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==Overview==<br />
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The SMU manages thermal and power conditions to optimize the power and airflow while keeping audible noise to a minimum. Power consumption and temperature are monitored by the [[operating system]], which communicates the necessary adjustments back to the SMU. The SMU makes the changes, slowing down or speeding up fans as necessary.<br />
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Resetting the SMU may fix certain problems during [[troubleshooting]].<ref>https://web.archive.org/web/20081227234016/http://support.apple.com/kb/HT1436?viewlocale=en_US</ref><br />
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== See also ==<br />
* [[Power Management Unit]] (PMU)<br />
* [[System Management Controller]] (SMC)<br />
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==References==<br />
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* Owen W. Linzmayer (ed.). ''Desktop and Portable Systems: Second Edition''. {{ISBN|0-321-33546-5}}.<br />
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[[Category:Apple Inc. hardware]]<br />
[[Category:Macintosh computers]]<br />
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