Kai Schaetzl wrote: > I've been playing and comparing frequency scaling between AMD and Intel > CPUs yesterday and there seem to be great differences between AMD and > Intel and some gotchas. This is all on CentOS 5.2 with latest Xen kernels > (which are supposed to be powersaving-enabled since 5.2). > I was looking at cpu frequency scaling a week or two ago on an Intel Q6600 quad core cpu. Rather than repeat myself, there are some numbers in this thread (post #6 amongst others): http://www.centos.org/modules/newbb/viewtopic.php?topic_id=15484&forum=37 Bottom line - the power saving between having frequency scaling enabled or not was surprisingly small (only 2-3W). It would appear that these processors are already fairly efficient at idle and scaling down the frequency adds little to the overall savings that may be obtained.