Thinkpads Forum

I mean, the Laptop should run Cooler and longer (with battery), If I use Core Solo ?, I have a T60p 2.16Ghz Code Duo, thanks

It seems logical that it should use less power. However, I would think there is a difference if you use a true core solo cpu and a core duo with a disabled core.

Kamika007z wrote:It seems logical that it should use less power. However, I would think there is a difference if you use a true core solo cpu and a core duo with a disabled core.

I agree, nonetheless remember that the second CPU is just LOGICAL, it is not a Physical CPU, so at the end is pure Software, I think ????, maybe I am wrong.

it is not a logical. Core duo is different than hyperthreading where you have the ability to create a second logical processor. There are two physical cores with core duo. And I doubt that you will observe huge differences in power consumption as the cache is still active in whole.

brosen wrote:

Kamika007z wrote:It seems logical that it should use less power. However, I would think there is a difference if you use a true core solo cpu and a core duo with a disabled core.

I agree, nonetheless remember that the second CPU is just LOGICAL, it is not a Physical CPU, so at the end is pure Software, I think ????, maybe I am wrong.

Indeed, just like irfan says, the Core Duo is not the same as hyperthreading.

They are two different processor cores on one die. So they may look like 1 cpu, but in fact they are two cpu's!!

But to answer your question: I think it should last longer. It sounds logical. Maybe someone can test

From www.intel.com

T1400 (Core Solo), 2MB L2, 1.83 GHz, 667 MHz FSB, 27W
T2300 (Core Duo), 2MB L2, 1.83 GHz, 667 MHz FWB, 31W


So the Core Duo with the same specs will consume about 3% more power, but it has a lot more than 3% of additional processing power so that makes it more efficient. More processing power per unit of energy consumed.

Power consumption in the dual core units is not a constant (notwithstanding the numbers you show) and is not a linear function of processing "power". Depending on which section of the curve one finds himself at any given time, the processor is either more efficient or less efficient than single core units of the same manufacturing process technology with respect to power consumption.

IF the characteristics of the processing required are such that the two cores can work simultaneously, THEN what you say is true. On the other hand, if one is in the region of the power consumption curve where only one processor can be used, then there is minimal (and infinitessimal) added burden on the dual core units.

It's questionable if one can measure these details for realistic machine usage profiles. One would have to contrive a benchmark so that one can accentuate these differences for the purpose of measurement.