Celeron M CPU Speed Reduction

I recently got a new battery after mainly relying on a power outlet for months, and have noticed that my processor speed is cut from ~1.7GHz to ~800Mhz.

I know Pentims/C2Ds have SpeedStep and you can disable this, but what can I do for my Celeron - its really annoying when working on the go!

I have already set power options to "Always ON"

Fulls processor specs are:
Intel Celeron M
1.7GHz
Dothan Core
Socket 479 mPGA
90nm

Thanks

 

Bump.

 

Dothan core Celeron M's are not capable of speedstep. Run CPU-Z and post the results.

 

I have, those are the reuslts.

Unless it is plugged it, the speed is always cut to ~800MHz

 

Have you tried using the high performance power plan?

 

Have you checked the notebook's BIOS settings? Some notebooks have a BIOS setting that determines what speed the CPU runs at while on battery; I think it is likely your system is set to run at reduced speed when on battery.

 

There are 3 likely scenarios:

1. Software is reading the processor speed wrong

2. You don't really have a Celeron M

3. Your Celeron M is doing somthing that it is physically incapable of doing. (not disabled like it should be)

Try using NHC or RMClock. If speedstep is actually working you'll be able to control it.

 

OK Just to prove exactly whats going on, heres the comparison screenshot of CPUZ



I have no "high performance power plan", the clock speed is reduced whether i set to Always On or Power Management Off.

The BIOS has no settings that relate to this.

I will try the programs suggested.

Thanks for the help so far

Edit - using RMClock, if i disable CPU Throttling, the clock speed returns to the normal 1.7GHz. Is there any way to disable throttling in Windows?

 

Why dont you jut keep using RMclock, and even undervolt while your at it for a cooler CPU and more battery life.

 

Not true, the Dothan Celeron M's are capable of throttling between the lowest VID and the highest VID. Speedstep is actually multi-speed VID, so in essence the Celeron does not support Speedstep technology, however it doesn't mean the Celeron doesn't throttle to conserve battery life. When the original Banias Celeron M was released, it did not throttle, and as a mobile CPU a non-throttling processor had pathetic battery life. So Intel had to make the Celeron more competitive compared to the Pentium M.

So what the original OP is experiencing is perfectly normal, and there is absolutely nothing he can do (or would want to do to change it).

 

I DO want to change it lol....

I suppose RMClock will have to suffice. Thanks for the help

 

The thing is, you don't need to. If your running on battery mode and want the power all you need to do is run a program that needs the extra cpu power and the system should throttle up. If you want to further tweak this, then use RMClock and change the profiles for power saving and FID/VIDs to maximum, although I highly do not recommend this.

 

There's something wrong with the OP processor. It is not SpeedStep that working here (which is perfectly normal, as Celeron M's don't support it), because if you look at the screenshot, the multiplier is not changing. What's changing is the Bus Speed, which is not normal. SpeedStep changes the voltage /multiplier, not the bus speed. Something is broken with that motherboard/processor.

 

Interesting! I actually didn't catch that, very keen eye there!

Personally I don't think the motherboard or processor is broken. Infact, utilizing ODCM throttling in RMclock can mimic this exact phenomenon. Perhaps Sony when they manufactured this notebook, embedded BIOS ODCM underclocking instructions for the processor to improve battery life?

 

Possible, but also possible there is a piece of software that runs as a startup process that does the same that you are unaware of. Usually, both have some way to be disabled.

 

That could be true too, a Sony application that controls ACPI and OCDM throttling to improve battery performance. Makes sense.

 

Try updating the BIOS.

RMClock is quite a handy program to have, you should definately keep it.

 

I'm in way over my head lol.

I'll use RMClock to disable throttling when i need the extra CPU boost