Herbert Graf farcite.net> writes: > > What you are saying is finally -all energy- entering a system somehow > > turns into heat without loss.(Lol - Actually,heat itself is loss). Heat is gain in winter ... The computer room is just a large space heater. > Yup, for a computer system, except whatever is emitted through light or > other RF wavelengths (radiant heat being just a band of wavelengths of > EM radiation), or electrical currents (very small, things like ethernet > connections). Only light that finds its way out of a window counts ... all the rest is turned into heat in the room. > > I wish this was true because from the bill point of view, this > > approach indicates that all processes done by CPU,HDD,Optical Drives > > etc. is free of charge. Yes, the computer bill (for rack rentals etc) is mostly an electricity + cooling + network cost (bandwidth) bill. In a way ethernet bits are an extremely expensive kind of electricity ;-) Since cooling can be expressed in terms of efficiency as electrical power you can actually say something like X watts of computer actually cost 2.5*X watts (including A/C cooling). Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist