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'''VIA LongHaul''' is a [[central processing unit|CPU]] [[CPU throttling|speed throttling]] and [[Power management| power saving]] technology developed by [[VIA Technologies]]. By executing specialized [[Instruction (computer science)|instructions]], [[Computer software|software]] can exercise fine [[Control engineering|control]] on the [[CPU multiplier|bus-to-core frequency ratio]] and [[CPU core voltage]]. When the [[computer system|system]] first [[booting|boots]], the ratio and voltage are set to hardware [[Default (computer science)|defaults]]. While the [[operating system]] runs, a ''CPU [[device driver|driver]]'' controls the throttling according to how much [[load (computing)|load]] is put on the CPU.
This fine control over the CPU's operating parameters brings LongHaul in contrast to other competing technologies, where a CPU is typically allowed to switch between only two states - one that is fast but power-consuming and one that is slow but uses [[
There are 3 versions of LongHaul:
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==External links==
*[https://web.archive.org/web/20071007111134/http://www.via.com.tw/download/mainboards/6/13/VIA_C3_EBGA%20datasheet110.pdf VIA C3 in EBGA Datasheet]
*[http://www.halfhill.com/terms.html Tom's Computer Dictionary] - ''LongHaul'' entry
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[[Category:Computer hardware tuning]]
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