Open the fridge door this Christmas and you could be straying into a battle zone. The sausage rolls are under siege and the turkey's turned chicken, shoved aside by an arsenal of pipes, pumps and water tanks. Aunty's trifle has surrendered to wires and circuit boards that look suspiciously like the innards of a computer. The overclock-ers are invading—and the last thing on their minds is your Boxing Day buffet.
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