From: terje.mathisen@tmsw.no   
      
   George Neuner wrote:   
   > On Wed, 24 Sep 2025 21:08:10 +0300, Michael S   
   >  wrote:   
   >   
   >> On Mon, 22 Sep 2025 19:36:05 GMT   
   >> MitchAlsup  wrote:   
   >>   
   >>> Big servers have rather equal power in the peripherals {DISKs, SSDs,   
   >>> and NICs} and DRAM {plus power supplies and cooling} than in the   
   >>> cores.   
   >>   
   >>   
   >> Still, CPU power often matters.   
   >   
   > Yes ... and no.   
   >   
   > 80+% of the power used by datacenters is devoted to cooling the   
   > computers - not to running them. At the same time, most of the heat   
   > generated by typical systems is due to the RAM - not the CPU(s).   
   >   
   I am quite sure that number is simply bogus: The power factors we were   
   quoted when building the largest new datacenter in Norway 10+ years ago,   
   was more like 6-10% of total power for cooling afair.   
      
   .. a quick google...   
      
   https://engineering.fb.com/2011/04/14/core-infra/designing-a-ver   
   -efficient-data-center/   
      
   This one claims a 1.07 Power Usage Effectiveness.   
      
   Terje   
      
   --   
   -    
   "almost all programming can be viewed as an exercise in caching"   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)