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Centrino Processors vs. athlon 64 and p4m - Page 2

post #21 of 35
9/26/04 at 3:00pm
i have to say that i really doubt that mobometer checks the temp. right. I say that because when i was changing my RAM i checked the temp of the processor directly (with infrared temp sensor pointed on it) and it was considerably lower than the temp that mobometer showed.
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post #22 of 35
9/26/04 at 3:05pm
one more thing to add. while i am writing this mobometer shows that my HDD temp is 39, and my processor temp is 53 C. thats 14 C difference. The only part of the notebook that is warm to the touch is the part that covers the HDD, while the part above the CPU itself is considerably colder. that is a big contradiction in my book.
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post #23 of 35
9/26/04 at 3:46pm
Quote:
Originally Posted by Uriel
one more thing to add. while i am writing this mobometer shows that my HDD temp is 39, and my processor temp is 53 C. thats 14 C difference. The only part of the notebook that is warm to the touch is the part that covers the HDD, while the part above the CPU itself is considerably colder. that is a big contradiction in my book.
its very likely that mobilemeter is reporting the temp incorrectly. It does have to calculate the temp from the cpu probe.
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post #24 of 35
9/26/04 at 10:09pm
Quote:
Originally Posted by Uriel
one more thing to add. while i am writing this mobometer shows that my HDD temp is 39, and my processor temp is 53 C. thats 14 C difference. The only part of the notebook that is warm to the touch is the part that covers the HDD, while the part above the CPU itself is considerably colder. that is a big contradiction in my book.
I've noticed the exact same thing with my Acer Ferrari 3200, so I don't think this is a bug in MobileMeter.
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post #25 of 35
9/27/04 at 5:28am
mobilemeter only "reads" the temp. from Windows, so I am guessing that Windows temp is wrong.
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post #26 of 35
9/27/04 at 6:22am
The Pentium-M and some other mobile chips are MEANT to run hot.

Not that they would generate a lot of heat.

aDothan chip will even at full speed generate 3x less heat than an A64M and 5x less heat than a real Pentium 4. (Power consumption being 20W vs 60W vs 100W, respectibly). Using speedstep and other on-chip power saving options, the Pentium-M's the power usage (and the heat generation that results from it) will drop to single digits.

But not only that -- the Pentium-M chips and some other -M chips are also engineered to work at temperatures up to 100 degrees Celsius (212 F), so even less cooling would be needed to keep them at tolerable heat levels. Desktop chips are rated only up to 65 to 70 degrees C (150-160 degrees F) so they need a lot more heavy, noisy cooling.
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post #27 of 35
9/27/04 at 12:31pm
Quote:
Originally Posted by pigdog
The Pentium-M and some other mobile chips are MEANT to run hot.

Not that they would generate a lot of heat.

aDothan chip will even at full speed generate 3x less heat than an A64M and 5x less heat than a real Pentium 4. (Power consumption being 20W vs 60W vs 100W, respectibly). Using speedstep and other on-chip power saving options, the Pentium-M's the power usage (and the heat generation that results from it) will drop to single digits.

But not only that -- the Pentium-M chips and some other -M chips are also engineered to work at temperatures up to 100 degrees Celsius (212 F), so even less cooling would be needed to keep them at tolerable heat levels. Desktop chips are rated only up to 65 to 70 degrees C (150-160 degrees F) so they need a lot more heavy, noisy cooling.
whats the power consumption of a dothan? 21.5watts?
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post #28 of 35
9/27/04 at 6:03pm
Quote:
Originally Posted by nark
whats the power consumption of a dothan? 21.5watts?
Yes. Surprisingly, a 2.0 Dothan consumes less power than a 1.5 Banias.

All the data can be seen at http://users.erols.com/chare/elec.htm
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post #29 of 35
9/27/04 at 7:19pm
Yes, but heat generation is greater due to transistor leakage problems with Intel's 90nm process used to produce Dothan (Banias is produced with a 130nm process without the same problems). The typical power usage on the low-power Mobile Athlon 64 processors produced at a 130nm process is only 26W (max 35W), and the new ones produced at a 90nm process will have at least 10% lower power consumption and in comparison AMD dosen't have the same transistor leakage problems with their 90nm process.
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post #30 of 35
9/28/04 at 12:31am
Quote:
Originally Posted by snorre
Yes, but heat generation is greater due to transistor leakage problems with Intel's 90nm process used to produce Dothan (Banias is produced with a 130nm process without the same problems). The typical power usage on the low-power Mobile Athlon 64 processors produced at a 130nm process is only 26W (max 35W), and the new ones produced at a 90nm process will have at least 10% lower power consumption and in comparison AMD dosen't have the same transistor leakage problems with their 90nm process.
please link an article stating that. I know the preshott had this problem. Nowhere did I read that the dothan had this problem.
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post #31 of 35
9/28/04 at 3:03am
i am very curious about that too. link plz.
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post #32 of 35
9/28/04 at 4:54pm
Quote:
Originally Posted by Uriel
i have to say that i really doubt that mobometer checks the temp. right. I say that because when i was changing my RAM i checked the temp of the processor directly (with infrared temp sensor pointed on it) and it was considerably lower than the temp that mobometer showed.
I read this article on-line, I don't remember exaclty where, but it said that most mobile and desktop mobos don't have heat sensors on them. And that the temperature the program reports is just a manufacturer estimate at that processor load. This may be true, cause i remember on my old desktop i used this program called Everest Home Edition for like hardware and benchmarks and it also has temp meter. I remember searching my mobo and my cpu+fan for thermal sensor but I didn't find anything. I think that the temperatures prom MobileMeter are mostly the manufacture's estimate of the temperatre at that load of the CPU or HDD.
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post #33 of 35
9/28/04 at 5:31pm
on mobilemeters site it is clearly stated that it DOES NOT take the temp. from BIOS. it gets it from Windows. And since laptop mobos dont have heat sensors i seriously doubt that the temp is corect.
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post #34 of 35
9/28/04 at 6:53pm
Quote:
Originally Posted by nark
please link an article stating that. I know the preshott had this problem. Nowhere did I read that the dothan had this problem.
http://www.wi-fiplanet.com/news/article.php/3348761
Quote:
"The problem I believe Intel is facing with its 90-nm process is higher leakage currents," Kevin Krewell, principal analyst for In-Stat/MDR, told internetnews.com. "This will increase power consumption and it is especially a problem when the processor is in sleep mode. Intel has likely been working on changes to the design to mitigate the problem. Dothan would not be very useful if it offered shorter battery life and lower clock frequencies. Originally, may of us expected Dothan to offer significantly higher clock frequencies, but now my expectation is for much more modest or no increase in clock frequency. So I don't expect Dothan to offer breakaway performance, but rather a smooth increment."
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post #35 of 35
9/29/04 at 4:57am
Quote:
Originally Posted by snorre
humph....interesting article....but

Quote:
The second-generation is expected to feature a 400 MHz front side bus and 2MB of L2 cache.
expected......me thinks this article was written BEFORE the dothan was released.

Quote:
The problem I believe Intel is facing with its 90-nm process is higher leakage currents," Kevin Krewell
humph, the word believe really makes me think otherwise of what this guy knows. Also, notice the date......May 3, 2004. Please post a link to an up-to-date article plz.
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