Originally Posted by pauldovi
Can the computers run without the increased heat input? No.
Thats means it isn't wasted.
But we can significantly reduce it from 50% of the power from the wall, to easily and fairly cheeply 20%. If we want to spend more we can (according to the article) reduce it to even 7%.
Just for fun, i ran some numbers
24 hrs/day 365 days/year .04 $/(kw*hr) = 350.4 $/(kw*yr)
So if you could reduce the amount of wasted power by 1000W, you would save $350 in one year.
Lets say that you use 350 W and have a 75% effecient PSU (total of 466 W from wall). If you could reduce it to say 93% (total of 376 W from wall), then you would be saving $31 a year.
You're going to be spending much more than that to get 93% effecient PSU's, but the point here is not
that you the cost of a 75% effecient PSU will be the same as a 93% effecient PSU over the long run.... the point her is to save and conserve energy, reduce emisions.
I hate it when people say "You should spend an extra $500 to upgrade something to save you $20 a year." They have their reasoning wrong. You're not spending the money to benefit you, you're spending the money to benefit your children and grandchildren, etc.