[Bug 422858] Re: Atom N280 frequency scaling not supported

[rkagan]

On Thu, Dec 10, 2009 at 06:47:30AM -0000, summerfk wrote:
> I get the same problem under Windows 7 - maximum speed is 1.33GHz
> [...]
> machine doesn't have the issue under XP.
> [...]
> I wonder why XP is different? 

Most likely the reason is different power profiles (by default XP has
EIST off).

> Win7 reports 1.33Ghz
> CPUZ reports 1.66Ghz
> So is this just a Win7 reporting bug?

I guess it's rather CPU-Z reporting bug (or feature, they may just be
not interested in the *actual* state).

You should try Intel's own utility:
http://www.intel.com/support/processors/tools/piu/

Also there are quite a few facts on power management at
http://www.intel.com/support/processors/sb/CS-028855.htm

-- 
Atom N280 frequency scaling not supported
https://bugs.launchpad.net/bugs/422858
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