1.7GHz equivalent to 3.06GHz?

[wutwjd]

I'm reading and hearing about all these different factors you use when you want to find out an equivalent speed for Pentium-M chips. Factors from 1.6 to 1.9 I've heard. I've heard some people say that it's dependent on what applications you might be using.

Does anyone have any definitive information on this? Any comparisons in performance between these two chips? For that matter, what two chips are being compared here? A desktop processor? A Mobile Pentium 4-M? A Mobile Pentium 4? What conditions are these processors being compared at (ie., on battery power? plugged in?)?

Such an important question (to me) in considering what kind of notebook to get. Hopefully someone (AnandTech) will post something up about this...

Thank you!

 

[Frightcrawler]

this is an unfair comparison because of an outside factor - battery life.
the mobile intel pentium 4 (only laptop processor with 3.06ghz) is basically a desktop processor.

 

[dnuggett]

There is no definitive answer on this unfortunately. This is because Intel, IIRC has not released any comparison reference data between these chips, for a very good reason : There is a lawsuit either in progress or in the works regarding this issue and speed ratings vs. the P3.

Every time I've sen an independent review or comparison it has been between the M chip and a desktop P4. The multiplier I am fimiliar with is 1.6. I posted awhile back that Voodoo uses 1.78 as advertisement and now I'm hearing 1.9. Personally 1.9 is a bit high IMO and I wouldn't use that benchmark reliably.

The fact that it depends on the applications you are using is stating the obvious and a no brainer. What the reviews and benchmarks try to do is find the multiplier from an enveloping general sense.

As far as the unfair comparison in battery life mentioned before, the M chip does better in battery usage that the P4 desktop or mobile chip, and about an hour better than the P3M. But that doesn't answer the question as I read it. I think your question was something like under what condition were these chips tested in order to get the applied results? The only fair way these procs could be compared is on AC, otherwise the M will throttle down under battery usage, and although it will/can operate at it's full rated speed on battery power, for some applications and tests it will never reach potential. I am going to make the pretty safe assumption the comparisons had the M on AC.

 

[ReiAyanami]

my dell lappy shows 3.06ghz/1.59ghz when booting up, i'm assuming it operated 1.59ghz on battery and 3ghz when plugged in

 

[abovewood]

I have a 1.6 Pentium-M Latitude D600, it isn't that much faster then 1.8 P4 M.
1.6 multiplier is already too high.

 

[dnuggett]

Originally posted by: abovewood
I have a 1.6 Pentium-M Latitude D600, it isn't that much faster then 1.8 P4 M.
1.6 multiplier is already too high.

I'm not sure why this is because I am not in front of your laptop, but the 1.6 multiplier has been right on in my experiences. This is fairly accurate multiplier. The 1.6 M is much faster than a 1.8 P4-M.

 

[Bateluer]

Originally posted by: abovewood
I have a 1.6 Pentium-M Latitude D600, it isn't that much faster then 1.8 P4 M.
1.6 multiplier is already too high.

I remember the initial PentiumM notebooks besting 2.2Ghz P4Ms . . .

 

[alexruiz]

It depends on the applications..... ask sysmark 2002 and it will tell you the IPC of the P4- is higher that the P-M's.......

 

[VTboy]

Well it really does depend on what you run, some things it might only be 1.2X faster while other things it really might be 1.9 times faster, but I think the average is around 1.6X as fast.