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Minimum, Average, Peak Power

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12:30 AM - 02/05/2009 by Patrick Schmid and Achim Roos

Minimum, Average, Peak Power during PCMark05

Idle power is very much the same: it’s 28 W for the Atom 230 or 29 W for the other solutions. We have to emphasize again that it’s impressive to see the Core 2 machine reach the same idle power as the self-declared low-power Atom.

The average power requirement during PCMark05 is of course much higher on the Core 2 Duo E7200 (43.8 W), and somewhat higher on the other systems (31.3 to 33.5 W). We found the lowest power requirements on the single core Atom 230, followed by the dual core Atom 330. HyperThreading has a bit of an impact on average power.

Minimum, Average, Peak Power during SYSmark 2004 SE

Again, minimum power was 28 W in the case of the Atom 230 single core and 29 W for all the other machines.

The average power requirement for SYSmark 2004 SE was a bit different than for PCMark05, though. While the Atom 230 stays at only 30 W, the Atom 330 dual core required an average of 32 W without HyperThreading, and 33 W with this feature enabled. The Core 2 Duo was only one watt behind at 34 W, which is impressive.

Things change when looking at peak power: the Core 2 machine required up to 54 W here, whereas the Atoms stayed well below 40 W. However, keep in mind that the Core 2 system can provide up to several times the performance if needed, and it will stay at peak power for a much shorter time than any Atom system, which will take longer for each and every workload.

Talkback
Anonymous 02/05/2009 10:55 AM
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Doesn't seem like much of an improvement from its single core predecessor compared to the difference between the core solo and duo; however, you can't argue with the performance per watt statistics. I wonder when we will see these in web oriented laptops like the Asus Eee PC?

dangerous_23 02/05/2009 11:30 AM
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for f*** sakes watt-hours is energy not power

apache_lives 02/05/2009 11:54 AM
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cost is still the higher priority over performance and power etc - its still cheaper then a celeron etc, and is another performance increase in terms of usability NOT benchmarks - same deal as the Pentium 4 era with HT - the HT made systems seem more responsive reguardless of benchmarks - any P4 HT owner will aggree with me, but still yes it has weak (but sufficent) performance.

nihility 02/05/2009 12:53 PM
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Which one of these tests checked multitasking performance?

3lvis 02/05/2009 12:53 PM
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Some how it doesnt seem fair to compare atom to desktop CPUs. A better comparison would have been mobile CPU's to atom.

salgado18 02/05/2009 12:55 PM
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I still think this article, although great, misses one point: 95% of the time we use a pc, be it notebook, desktop, cellphone, whatever, the processor is idle. Nobody would buy a netbook to compress large files all day, or render complex scenes. They buy it to surf the web or type stuff. So it would be interesting to see a small one-day marathon: give three editors the pcs above, and measure the power used over one day. I bet the Atom beats Core 2 easily.

nihility 02/05/2009 1:19 PM
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salgado18 :
I still think this article, although great, misses one point: 95% of the time we use a pc, be it notebook, desktop, cellphone, whatever, the processor is idle. Nobody would buy a netbook to compress large files all day, or render complex scenes. They buy it to surf the web or type stuff. So it would be interesting to see a small one-day marathon: give three editors the pcs above, and measure the power used over one day. I bet the Atom beats Core 2 easily.



I bet the editors will want to smash the atom PCs with a hammer by the end of the day.

chjade84 02/05/2009 2:29 PM
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I still think that the best place for these is in netbooks. My friend has an Asus Eee PC with the Atom in it and he loves it for college classes. It's great for taking notes and browsing the web and can go something like 6-7 hours on a charge. When used like this it really shows how much power efficiency can help.

It even plays Starcraft! :)

salgado18 02/05/2009 2:30 PM
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chjade84 :
It even plays Starcraft!



Now that's a surprise! It should be benchmarked! :D

Anonymous 02/05/2009 3:32 PM
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I would like to know efficiency of the power supply used in this review with 20 W, 40 W and 60 W loads.

cknobman 02/05/2009 3:43 PM
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nihility :
I bet the editors will want to smash the atom PCs with a hammer by the end of the day.



Exactly. What a complete and total failure. 80% of the benches showed worse performance for the dual core vs single core Atom. Intel's atom processor is a joke.

slowstuff 02/05/2009 3:50 PM
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How do these 4+ year old benchmarks test Multi core processors? Oh that's right, they are from the era just before benchmarks started caring about multiple cores. How about you disable one of the Cores on the Core 2 & see how much it drop... probably not much if any as 98% of the work is happenind on 1 core.

How do these tests represent real world useage? Oh that's right, they don't. who runs 4 year old benchmarks, encodes music or does rendering on a netbook / netbox.... NO ONE with a brain.

What use is a set of test that don't represent anything realistic or even test the processor fairly? Oh that's right, none. Seriously, test it in REAL WORLD USE against each other, test it's multi taking capabilities VS the single core system (230 vs 330).

Lets test a moped vs a motor cycle & see which one wins in a drag race & used the most gas, that is essentially what you just did... IT COMPLETELY MISSES THE POINT OF THE OBJECT BEING TESTED.

pug_s 02/05/2009 3:57 PM
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I don't understand why Tomshardware or any other hardware websites try to use an AMD equivalent. AMD already have something to compete with the Atom with their AMD Geode NX, which is based on the Athlon XP processors. Intel Atom processors is not built based on the Centrino design rather than a P5 at a higher clock speed.

danimal_the_animal 02/05/2009 5:11 PM
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FAIL!

loftie 02/05/2009 5:22 PM
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Considering the idle power is the same, could we not undervolt/underclock the C2D and see how much more power the C2D would use at load then. I'd find that interesting, especially if it still out performs the atom, which I'd assume it would.

+1 for a low power AMD being thrown into the mix and a possible undervolt/underclock on that too - I'm sure AMDfan girl will be able to comment on this aspect :)

bounty 02/05/2009 6:13 PM
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PCmark 05 works fine as a test for simple web browsing, email etc. File compression is not something you do all day, it's something you do maybe once a day. When I do it, I don't want my machine to poo it self. WinRar is multi optomized, and it shows. Encoding music should be possible on a desktop, and we're talking desktop platforms.

A good test to possibly add might be PCMark05 plus either WinRAR or iTunes as a resonable multiple work load test. We need a "some bloated flash/java sites" + IM + youtube test... or lets just see how these machines handle youtube fullscreen @ 1680x1050. Does the Atom fall apart while doing all that plus watching a movie? Watching an AVI on a "desktop" while browsing web(flash/java/super complicated+email+IM) seams a reasonable standard.

bustapr 02/05/2009 6:24 PM
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How could you guys compare a netbook cpu with the super efficient fast e7200 desktop cpu!Its like comparing an athlonx2 to a phenomII.

Area51 02/05/2009 6:58 PM
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Toms,
on page 4 the slides shows Core 2 Duo with HT which is not correct. please advise.

jeffunit 02/05/2009 8:01 PM
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As slowstuff points out, it is pointless to run single threaded benchmarks on multi core processors. They could have used lame-mt, but didn't (it only has 2 cores). Of course there will be minimal differences between a 1 core atom and a 2 core atom on a single threaded benchmark.

Try to use some multi threaded benchmarks, or at least run several benchmarks at the same time. Toms hardware keeps on getting worse, I think I will stop reading it.

jeffunit 02/05/2009 8:02 PM
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I meant to say lame-mt only uses two threads. Still a better test than plain lame though.


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