…otherwise known as Green IT…

http://en.wikipedia.org/wiki/PowerNow!

http://en.wikipedia.org/wiki/Cool%27n%27Quiet

http://en.wikipedia.org/wiki/SpeedStep

PowerNow! - AMD CPU frequency scaling

Cool'n'Quiet - AMD CPU frequency scaling for desktop CPUs

Optimized Power Management - AMD CPU frequency scaling for newer Opteron CPUs

SpeedStep - Intel CPU frequency scaling

Enhanced Intel SpeedStep (EIST) - Newer name for SpeedStep

http://www.tomshardware.com/reviews/bios-beginners,1126-8.html

http://workinghardinit.wordpress.com/2011/06/20/consider-cpu-power-optimization-versus-performance-when-virtualizing/

http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/6fb8cc70-bc52-4b3e-9aca-94288225a6ba

http://blogs.citrix.com/2011/07/11/optimise-your-server-for-maximum-performance/

http://wiki.xen.org/wiki/Xen_power_management

http://www.unidesk.com/blog/speedstep-and-vdi-it-good-thing-not-me

http://www.vmware.com/pdf/Perf_Best_Practices_vSphere5.1.pdf

http://virtualkenneth.com/2010/12/06/bios-settings-in-a-vmware-esxivsphere-environment/