The San Jose mine collapsed on 5 August 2010, cutting off the miners at a depth of more than 700m (2, 300ft).

BBC: Chile marks year since mine collapse

In effect, this would eliminate the depth of the hair-cutting market.

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It had reached a depth of 428 metres on Saturday morning after cutting through 56 metres of rock in 24 hours.

BBC: World media gear up for Chilean mine rescue

The payoff: Cutting out so much data enabled them to get rid of external depth memory as well as the bottlenecks caused by shuffling data between it and the graphics chip.

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