[jamelgo]

I was wondering if anybody knows how to force a speedstep status to make a processor run at its lower speed.

The case is the following. I have a machine with a Mobile Pentium 4 , 3.06GHz non HT at 533MHz FSB. It is not a Pentium 4-M (that I know has greater control of what I want). HOWEVER, intel says this processor supports enhanced speedstep, which is actually a two status thing. When it is connected to current it runs at full speed, and when it runs on batteries and those are under a certain threshold, it lowers the multiplier to 12x.

Is there any way to force the machine to use this 12x multiplier when operating connected to current?


So far the only thing I been able to find is a software to control clock modulation, that at least allows me to prevent the machine from getting too hot at times.


Second question: I used two different BIOS versions from the motherboard manufacturer. One is supposed to have enhanced speedstep and the other does not, but I don't see any substantial change in behaviour using one or the other. The only difference is that under one the processor is reported as a Mobile Pentium 4 under WinXP and the other reports a Genuine Intel Pentium 4.


Thanks



P.S.: I got the notebook from fujitsu-siemens, AMILO D 1840. The original model is a UNIWILL N258SA0. Still looking for the PLL chip information. BTW, siemens BIOS was crappy so I changed it for uniwill's

[thegave]

try the centrino hardware control program, www.pbus-167.com it allows you to set a range of multipliers and voltages for each one allowing you to undervolt which saves a little extra power too.
if you want it to run at your minimum you force it to run under the Max Battery profile.
wait then again i don't know if CHC will work with a p-4m....

run a search for RMclock i don't have the link on me now but that works in a similar way to CHC.

[Matth]

http://cpu.rightmark.org/products/rmclock.shtml

The Intel list I found had a Mobil P4 with EIST anfd no HT, but no number.
http://www.intel.com/products/proces...ium4/index.htm

Anyway, if RMCLOCK supports it, I'd actually suggest using "automatic" and moving the slider towards powersave - though even at that level, it's still got a reasonable degree of "power on demand".

Alternatively, when identified as a MOBILE, try tweaking the Power settings in XP - anything other than "Always on" or "Desktop" should activate EIST - and on my P4 640 model, the Windows implementation of EIST is very stingy - I suspect it's a HT bug, as with a full single thread load (50% across both logical CPU units) , it stays at the lower level (for this CPU, the multiplier only shifts between 14/15/16). With a non-HT CPU of greater spread, maybe it would find a middle level.

If RMCLOCK reports the settings though, you should be able to lock it high, low, or auto over a limited range if you want.

[jamelgo]

I already used RMClock and the only thing I get is ODCM (on demand clock modulation), but it seems to be no way to change the multiplier to the "running on batteries" state. So I asume it is impossible to change the multiplier by software.


Anyway, many thanks for the replies.

[thegave]

Oh hey you know what you could try, Crystal CPUID. It's a Japanese app has english you'll have to google it cuz I don't know the link but it supports multiplier management and it will probably work for your processor.