[ltp] X60 - (bad) experience, others?

[Nils Faerber]

Ashok Leyland schrieb:
> On Tue, Jan 29, 2008 at 07:41:48PM +0100, Nils Faerber wrote:
> [snip]
>> And that the X60 CPU cannot be clocked below 1GHz is quite rediculous.
>> And disabling undervolting and underclocking is also not very helpful
>> (pre Core2 CPUs were able to undervolt/-clock which significantly
>> reduced heat - why did Intel disable this?).
> AFAIK, the phc patch (http://phc.athousandnights.de/) can be used to
> undervolt C2D, apart from the lowest frequency. As I recall,
> undervolting the pentium m on my T42, I was not able to reduce the
> voltage much at the lowest freq in any case; the large differences
> were at higher freqs, and did have a major effect, c. 20C temp reduction
> under heavy load. I have applied the phc patch apparently successfully
> to 2.6.24 (the sysfs entries are there), but haven't got round to doing
> anything with it yet.

AFAIK the T5600 and other Core2 CPU have hardware low limits that cannot
be overridden by software. But I will recheck that page again.

Many thanks for the pointer!

> HTH
> [snip]
Cheers
  nils faerber

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