Many motherboards are sold, and advertised, with extensive facilities for overclocking implemented in hardware and controlled by BIOS settings. Web page for a typical motherboard claiming overclocking support Higher clock rates and voltages increase power consumption, also increasing electricity cost and heat production. The additional heat increases the ambient air temperature within the system case, which may affect other components. The hot air blown out of the case heats the room it's in. Fan noise: High-performance fans running at maximum speed used for the required degree of cooling of an overclocked machine can be noisy, some producing 50 dB or more of noise. When maximum cooling is not required, in any equipment, fan speeds can be reduced below the maximum: fan noise has been found to be roughly proportional to the fifth power of fan speed; halving speed reduces noise by about 15 dB. UK Health and Safety Executive: Top 10 noise control techniques Fan noise can be reduced by design improvements, e.g. with aerodynamically optimized blades for smoother airflow, reducing noise to around 20 dB at approximately 1 metre or larger fans rotating more slowly, which produce less noise than smaller, faster fans with the same airflow. Acoustical insulation inside the case e.g. acoustic foam can reduce noise. Additional cooling methods which do not use fans can be used, such as liquid and phase-change cooling. An overclocked computer may become unreliable. For example: Microsoft Windows may appear to work with no problems, but when it is re-installed or upgraded, error messages may be received such as a "file copy error" during Windows Setup. Article ID: 310064 – Last Review: May 7, 2007 – Revision: 6.2 How to troubleshoot problems during installation when you upgrade from Windows 98 or Windows Millennium Edition to Windows XP Microsoft says this of errors in upgrading to Windows XP: "Your computer [may be] over-clocked." Because installing Windows is very memory-intensive, decoding errors may occur when files are extracted from the Windows XP CD-ROM The lifespan of semiconductor components may be reduced by increased voltages and heat. Warranties may be voided by overclocking.
Many motherboards are sold, and advertised, with extensive facilities for overclocking implemented in hardware and controlled by BIOS settings. Higher clock rates and voltages increase power consumption, also increasing electricity cost and heat production. The additional heat increases the ambient air temperature within the system case, which may affect other components. The hot air blown out of the case heats the room it's in. Fan noise: High-performance fans running at maximum speed used for the required degree of cooling of an overclocked machine can be noisy, some producing 50 dB or more of noise. When maximum cooling is not required, in any equipment, fan speeds can be reduced below the maximum: fan noise has been found to be roughly proportional to the fifth power of fan speed; halving speed reduces noise by about 15 dB. Fan noise can be reduced by design improvements, e.g. with aerodynamically optimized blades for smoother airflow, reducing noise to around 20 dB at approximately 1 metre or larger fans rotating more slowly, which produce less noise than smaller, faster fans with the same airflow. Acoustical insulation inside the case e.g. acoustic foam can reduce noise. Additional cooling methods which do not use fans can be used, such as liquid and phase-change cooling. An overclocked computer may become unreliable. For example: Microsoft Windows may appear to work with no problems, but when it is re-installed or upgraded, error messages may be received such as a "file copy error" during Windows Setup. Microsoft says this of errors in upgrading to Windows XP: "Your computer [may be] over-clocked." Because installing Windows is very memory-intensive, decoding errors may occur when files are extracted from the Windows XP CD-ROM The lifespan of semiconductor components may be reduced by increased voltages and heat. Warranties may be voided by overclocking.
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Web page for a typical motherboard claiming overclocking support
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UK Health and Safety Executive: Top 10 noise control techniques
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Article ID: 310064 – Last Review: May 7, 2007 – Revision: 6.2 How to troubleshoot problems during installation when you upgrade from Windows 98 or Windows Millennium Edition to Windows XP