I came across an interesting article:
I was curious why linux consumes 12% less power than windows on the same hardware.
“There are three states to these Windows power plans – Power Savings, Balanced and High Performance – which are selected through the Windows Control Panel Power Settings options. These options can also become enforced through the Active Directory through group policies.”
“The energy saving choices available with the Linux 2.6 kernels shipped with RHEL 5.1 and SUSE Enterprise Linux 10 center on the ability to throttle back CPU clock speed through a kernel module called cpufreq. These modes are called “governors”, and are officially referred to as performance, ondemand, powersave, and conservative.”
“In most cases when sitting idle, Windows Server 2008 drew slightly more power than either Linux did on the same server. The exception was when Windows Server 2008 was running in power savings mode on the Dell server, where it drew on average 3% less power.”