Page last updated at 08:24 GMT, Thursday, 1 October 2009 09:24 UK

Tech Know: Nitrogen-cooled PCs

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Ellie Gibson meets the men who spend weekends in a shed, pouring liquid nitrogen into their computers.

They are trying to break world records for the fastest microprocessing speeds by "overclocking" their systems.

Turning up the computing speeds overheats the chip, but nitrogen can keep it functioning by cooling it rapidly.

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