Speedstep on a Pentium4 630 (2.6.13)

Speedstep on a Pentium4 630 (2.6.13)

[celtune-gmx]

HI!

Does somebody know how to scale a Pentium 630 (3,0 GHz) to another freq. 
than 2,8 GHz or 3,0 GHz (Slackware10.2)? I use centrino-module and 
ondemand, or can somebody send me a FID/VID Table for my 630? or is 
there a Patch for the 2.6.13 kernel.

Thanks      cel

Re: Speedstep on a Pentium4 630 (2.6.13)

[Andy Burns]

celtune-gmx wrote:

> Does somebody know how to scale a Pentium 630 (3,0 GHz) to another freq. 
> than 2,8 GHz or 3,0 GHz (Slackware10.2)?

Just to confirm that on my P4 630 running 2.6.15 with acpi_cpufreq.ko I 
also see just 2.8GHz and 3.0GHz in cpufreq-applet, I don't know what 
other speeds EIST could/should offer?

Re: Speedstep on a Pentium4 630 (2.6.13)

[Andy Burns]

celtune-gmx wrote:

> i think a cpu with EIST should be scaleable like a Pentium M (my 735 is 
> with EIST scaleable from 600MHz(0,700V) to 1,7 GHz(1,276V))

Would I get better results with speedstep-ich instead of acpi-cpufreq?

Re: Speedstep on a Pentium4 630 (2.6.13)

[Andy Burns]

cel wrote:

> I dont know ,I used on the 630 the module for the Pentium4 (dont know 
> the exact name now p4clockmod maybe) and ondemand  and at idle i had 375MHz 

Hmm, been trying to read up on EIST, seems that 14x (i.e. 2.8GHz) *is* 
the slowest clock speed P4 630 will throttle to, which kind of makes it 
a non-feature on a 3.0GHz CPU. What CPU feature does p4clockmod use to 
go lower than EIST apparently allows?

I'm running rawhide and don't see *p4*.ko did you have to build a custom 
kernel? I'd like to get idle consumption down on my box to quiet the 
fans even further ...

> and the vcore at about 1,6v (but thats not speedstep!)

lm_sensors reckons my Vcore is 1.35v to start with (perhaps I've got my 
VRM settings wrong in /etc/sensors.conf)

RE: Speedstep on a Pentium4 630 (2.6.13)

[Pallipadi, Venkatesh]

Actually No.

Acpi-cpufreq _and_ speedstep-centrino are the right drivers (don't worry
too much about the centrino name here) to be used on P4 630 and P4 Xeons
as well. One of these drivers will be used depending on the BIOS and
things like whether HT is enabled etc.

And EIST on P4s cannot do frequencies like 600 MHz. Typically 2.8 GHz is
the least frequency they can go upto. 

Thanks,
Venki

>-----Original Message-----
>From: cpufreq-bounces@lists.linux.org.uk 
>[mailto:cpufreq-bounces@lists.linux.org.uk] On Behalf Of Andy Burns
>Sent: Saturday, January 21, 2006 5:55 AM
>To: cpufreq@lists.linux.org.uk
>Subject: Re: Speedstep on a Pentium4 630 (2.6.13)
>
>celtune-gmx wrote:
>
>> i think a cpu with EIST should be scaleable like a Pentium M 
>(my 735 is 
>> with EIST scaleable from 600MHz(0,700V) to 1,7 GHz(1,276V))
>
>Would I get better results with speedstep-ich instead of acpi-cpufreq?
>
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