It should not be that high...remember there are many factors involved in the process ..
Not having a monitor on is a big factor.
SEcond, if they are dedciated crunchers and dont have other peripherals then you luck out on that respect as well
For the crucnhers then having cheap 2MB/16MB video cards also consume less electricity than say a 9700 PRo in each
A fast Raptor 10K drive vs. a normal 7200 or even 5400RPM model.
etc
Finally, even under peak usage the amount of electricity used is still not that high.
I believe a P4 3.2 uses only about 80-90Watts of power with other parts using a tiny extra added amount?
Either way you get the picture
