Editing Quiet PC (section)

==Causes of noise==
The main causes of PC noise are:
* Mechanical friction generated by disk drives and fan bearings
* Vibration from disk drives<ref>{{cite web|last1=JIANG|first1=LIXIN|title=Fundamentals of Harddisk Drive Acoustics|url=https://www.roush.com/wp-content/uploads/2015/09/Data-Storage.pdf|publisher=www.roush.com|access-date=3 April 2016}}</ref> and fans
* Air turbulence caused by obstructions in the flow of air 
* Air vortex effects from fan blade edges<ref>[https://en.wikibooks.org/wiki/Acoustics/Noise_from_Cooling_Fans#Noise_Generation_Mechanisms Noise Generation Mechanisms]</ref><ref>[http://www.jmcproducts.com/acoustic-noise/ "Acoustic noise"], jmcproducts.com</ref>
* [[Electromagnetically induced acoustic noise and vibration|Electrical whine]]: noise generated by electrical coils or transformers used in [[power supply unit (computer)|power supplies]], [[motherboard]]s, [[video cards]] or [[LCD monitors]].<ref name=SPCRLCDwhine>{{cite web | url = http://www.silentpcreview.com/stop_lcd_whine | title = How to stop the whining noise of your LCD monitor | first = Michael ‘Mike’ | last = Chin | publisher = SPCR | date = 2008-11-05 | access-date = 2008-11-05 | archive-date = 2008-11-08 | archive-url = https://web.archive.org/web/20081108044212/http://www.silentpcreview.com/stop_lcd_whine | url-status = dead }}</ref>

Many of these sources increase with the power of the computer. More or faster transistors use more power, which releases more heat. Increasing the rotation speed of fans to address this will (all things being equal) increase their noise. Similarly, increasing [[hard disk drive]]s' and [[optical disc drive]]s' rotation speeds increases [[Hard disk drive performance characteristics|performance]], but generally also vibration and bearing friction.