XPost: comp.dsp, sci.crypt, sci.electronics.design   
   From: gah@ugcs.caltech.edu   
      
   In comp.dsp Archimedes' Lever  wrote:   
   (snip)   
      
   > Today's modern CPUs put out less heat per cycle   
      
   Right units.  I believe it is true compared to NMOS processors,   
   maybe not to early CMOS processors.  NMOS uses a pull-up resistor   
   and dissipates power independent of clocking.  CMOS pretty much   
   only dissipates power when changing state.  (Except that newer   
   technology have significant tunneling currents as devices get smaller.)   
      
   > and exhibit less heat per "MHz" of "operating speed".   
      
   Wrong units.  Heat is energy or power times time.   
   So heat (energy) per cycle or power (energy/time) per   
   clock frequency (cycles/time).  For heat/MHz you have to   
   multiply by time, which is likely longer for current processors   
   than older ones.  (They run longer!)   
      
   -- glen   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)