[CentOS] Questions on cpu frequency scaling AMD vs. Intel
ned at unixmail.co.uk
Sun Aug 3 14:09:39 UTC 2008
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):
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.
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