Pentium M versus Core Duo

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ricka01 · #1 Post by **ricka01** » Mon Jun 25, 2007 2:57 pm

Hello,

I am having trouble finding performance comparisons between the Pentium M 1.8GHz and the Core Duo 2500. Do any of you know how much faster the Core Duo 2500 (T60) will be over the Pentium M 1.8GHz (T42). Assume 2 GB of RAM in each system, and that I use MS Office extensively, mostly with large spreadsheet models and Access data bases.

Thanks
Rick

#2 Post by **tomh009** » Mon Jun 25, 2007 3:10 pm

Core Duo T2500 is 2.0 GHz, giving you a 10% clock-speed advantage. Add to that a 10-15% clock-for-clock performance improvement, and you are looking at 25% improvement in CPU-intensive tasks.

In addition to that, Core Duo has two CPU cores, and if your applications are well multithreaded, that 25% improvement may turn to a 100% improvement on those applications. And even with single-threaded applications (which will only use a single CPU core), the dual-core design will keep the T60 much more responsive while you have a CPU-heavy application running.

#3 Post by **underclocker** » Mon Jun 25, 2007 3:12 pm

Here's a good article that compares a 2.0 Pentium M with the 2.0 Core Due (T2500).

http://www.anandtech.com/printarticle.aspx?i=2648

Regarding your question, based on this article and deductive reasoning, the 2.0GHz T2500 T60 should be slightly faster than the 1.8GHz Pentium M for some apps./functions and considerably faster for others.

SHoTTa35 · #4 Post by **SHoTTa35** » Mon Jun 25, 2007 5:36 pm

hello cross post - someone lock this one please:

http://forum.thinkpads.com/viewtopic.php?t=44926

then someone else hand off a spanking.

sugo · #5 Post by **sugo** » Sat Jun 30, 2007 12:10 am

If you have software that does multithreading, core duo can indeed be close to twice as fast. C2D makes a huge difference in H264 decoding and encoding.

gunston · #6 Post by **gunston** » Sat Jun 30, 2007 9:09 am

the difference isn't that obvious anyway.
maybe it does improve the Battery life/?
with Duo 2 core technology, it does offer longer battery life than dothan centrino processor?

#7 Post by **tomh009** » Sat Jun 30, 2007 9:17 am

Unfortunately the standard Core/Core 2 processors are not really any better than the Pentium M as far as power consumption goes -- unless you are considering the LV/ULV versions (as found in the X60s/X61s).

MelloYello · #8 Post by **MelloYello** » Sat Jun 30, 2007 2:24 pm

I've noticed that Core Duos run much hotter than either the Pentium M or C2D. That alone is a big consideration for me.

Troels · #9 Post by **Troels** » Sat Jun 30, 2007 5:53 pm

I can't agree that it really runs hotter in practice. Comparing a T42 (long fan) with a 1.7 GHz Dothan (400 Mhz FSB) it is pressed to operate at 94 deg C under full load and 100% CPU usage.

The T60p with 2x2.00 GHz never goes above 83 degrees under full load on both cores. This is done by running two simulations in Matlab assigning one instance of Matlab to one core and another to the other.

This is very surprising taking into account of lenovos bad cooling solution with the T60 series.
I think the Dothan is kinda surpassed by the CD and C2D, and i certainly notice the difference in speed doing simulations, and couldn't go back to the Dothan. For Word and internet surfing - no way it would be noticeable.

gunston · #10 Post by **gunston** » Sat Jun 30, 2007 6:15 pm

only CPU intensive program that would make the difference for these C2D and Pentium M processors.

aaa · #11 Post by **aaa** » Sun Jul 01, 2007 1:03 pm

Big difference between P-M/CoreDuo for me is undervolting. With the (none-ULV) Core cpus you can't get below .95v, with the P-M you can go down to 0.7v. Probably ~10w difference there. Plus an undervolted dothan P-M will generally have half the heat of a CoreDuo at full load. Out of the box without changing any settings, the Core is probably cooler though.

zverg · #12 Post by **zverg** » Tue Jul 03, 2007 8:51 am

I have a T42 that I just upgrade from the dothan 1.8 to the dothan 2.0, and a Dell *gasp* D620 with a 1.83GHz Core Duo (not core2, so it's the p-m architecture still) and good god the Dell absolutely burns me when I pull it from it's docking station after being largely idle all night. My T42, even with the 2.0, stays nice and cool all the time.

I should do some CPU performance testing. My thinkpad with the 2.0 feels quite a bit faster than the dell, even though the dell has 2GB of RAM (twice the RAM), a faster FSB, 7200RPM SATA drive, much better video driver support (Nvidia vs ATI, both computers are running Ubuntu 7.10 gusty gibbon).. I gotta chalk that up to the faster clock rate, similar processor architecture, and lack of multi-threaded applications.

sugo · #13 Post by **sugo** » Tue Jul 03, 2007 11:07 pm

The T42 here runs cooler than the X60s I sold as well. With room temperature at 22'C, the T42 CPU can stay under 48'C with fan off all night browsing web sites.

Pentium M versus Core Duo

Pentium M versus Core Duo

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