I once attended a talk by one of the people at Weta Digital about how they ran their datacentres; they worked out that they could save six figure sums per month

I once attended a talk by one of the people at Weta Digital about how they ran their datacentres; they worked out that they could save six figure sums per month by running their aircon lower and blades hotter; HP were prepared to keep the blades in warranty for a three degree bump but no more.