pentium-m or celeron-m ???????????

I read a review online that compared the two processors with benchmarking software and the results were very similar for the same speed processors.

the price of the pentium is 2 to 3 times the price of the celeron.

apart from the pentiums 2mb cache and it`s speedstep, power saving ability, which did not seem to influence the results much.

has anybody else compared the two processor types side by side.

thanks.

John.

 

For routine tasks any chip today will do. Since Celerons lack SpeedStep battery life will not be as good. Since they always run at full throttle they can be a bit noisier.

 

As a Celeron-M owner I can say that the power of the chip is not an issue. As you said the results are very similar and as the 400 series Celeron-M is now the norm, you can expect better performance than a Pentium-M at the same clock speed for less money.

However:

As Zaz said, the Celeron-M lacks speedstep. This can be annoying as it reduces battery life and means that the fans are nearly always on, if at low speeds. Hence battery life is not great and making the notebook quiet is very difficult.

If neither of those are important a Celeron-M is a fine processor, but I have already come across situations within the first month of using my new laptop where the extra features of the pentium would have been very useful. As a result I will be upgrading to a Pentium-M after Christmas.

 

Hi jess.

have you tried the RightMark CPU Clock Utility.

does anybody know if it will work with the celeron-m and if it increase battery runtime?

thanks.

John.

 

RMclock will work the same way Notebook Hardware Control does (roughly). Neither can work on a Celeron-M, the options to change speed and voltage just are not present.The Celeron-M cannot be clocked up or down unless it's a permanent change i.e. a full overlock or underclock, which I'm sure no-one on here will recommend for a laptop. It is also not possible to undervolt a Celeron-M, which is another reason I'll be upgrading.

I will no doubt be posting results (based on battery life) of my upgrade and subsequant undervolt and speedstep fiddling once the upgrade is complete and also performance benchmarks such as super-pi.

Edit: I hope to do this upgrade within the next week or so! (*so* excited!)

 

Celeron M's will also run hotter, because they run at full speed all the time.

 

when i asked the question in post 4, I actualy have been using RightMark CPU Clock Utility with my celeron-m on and off for a while.

and when i set it to battery saver mode, or dymanic switching the laptop does become a lot more sluggish as if the cpu is being reduced somehow?

and it does take long for the cpu fan to come on than usual.

so what is going on.

regards.

John.

 

That's weird! Errrm, sure u got a celeron-m? I had a quick fiddle with rm-clock just now and it didn't seem to do anything much. What does it give as the cpu clock frequency on power saver? Are you sure it's not just doing things like turning the HDD off or something? Also check your cpu temperatures. I can adjust fan settings on Toshiba Power Saver which reduces fan activity but means the cpu heats up pretty **** fast!

 

Hi.

in the monitoring page, the cpu core clock in red and throttle in purple.

if i have rightmark set at performance on demand the red bar stays full and the purpel bar, goes anyware from 15% all the way to 100% depending on cpu usage.



and i am certain i have an celeron-m 1.6 420

regards.

John.

 

You are just using ODCM(on demand clock modulation), there wont be much difference in terms of power consumption since your VID is going to be the same no matter what. It doesnt do much good. ODCM is basically used for throttling the cpu when it reaches its critical temperature.

Basically undervolting with RM or NHC is not possible without Speedstep(or Powernow/CnQ).

Check this thread out as well for more info on the usefullness of ODCM...
http://forum.rightmark.org/topic.cgi?id=6:268

 

your most likely right.

but the celeron-m dose support sleep and deep sleep mode, how are they activated or is it down to the motherboard.

I have tried a couple of cpu software coolers that i use with my athlon desk pc, but the do not work on my laptop is their any that do.

thanks.

John.

 

Sleep states dont need Speedstep, usually they are activated depending on the activity state of the cpu. If the cpu is being used then it will stay in an active state and automatically go down to different sleep states. The Pentium M I believe has a deeper sleep state which is controlled by Speedstep. The regular sleep states are not tied to Speedstep.

As for cpu coolers software their usefulness is debatable. If your cpu is getting uncomfortably hot then buy an external cooling fan. That should dissipate the heat more effectively.