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Frontpage Slideshow | Copyright © 2006-2010 orks, a business unit of Nuevvo Webware Ltd.
Friday, 20 August 2010 13:14

Phenom II X6 in the lab - 5 Power-Consumption

Written by Eliot Kucharik

amd_phenom_x6_front_small recommended08_75 
Review: Affordable Hexa-Cores

Power-Consumption:

It's quite amazing that the Phenom II X6 still kept the TDP at the same level as any Phenom II X4. Thanks to ASRock we could also play with the new 95W TDP 1055T. Short story: This is the first CPU which can reach efficiency levels of the mainstream Intel Core i5s and i3s. Please note some CPUs can't work with integrated graphics such as i5-750 and i7-975.

amd_phenom_x6_cb_power

amd_phenom_x6_cb_eff

Here the plain power-consumption using lamemt and 3DMark.  Please not that even quad-cores are not fully utilized, but the results should give you an overview what to expect when gaming.

 amd_phenom_x6_power_hd4850

amd_phenom_x6_power_onboard




(Page 5 of 6)
Last modified on Friday, 20 August 2010 12:30
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Comments  

 
+7 #1 anno 2010-08-20 20:42
Excellent review. :) It was very good to see the system cost and cost per performance graphs, when so many other review site ignore that aspect all together. And that while it's one of the key factors in deciding what to buy.

The conclusion was to be expected, and is in all honesty already fairly well known.

In some cases additional cores benefit games too though:

http://i34.tinypic.com/344e4c4.jpg

This will likely hold more and more true in the future - at least, when the graphics card isn't a bottleneck.
 
 
+6 #2 blandead 2010-08-20 21:06
"Would we use later software version of the x264 codec AMD would have beaten an Intel i7-975, but as you know to retest every platfrom and CPU takes lots time."

I hope people didn't overlook this comment. Just goes to show you when more programs are optimized to use all 6-cores, how much better these processors can be even compared to the i7-975
 
 
+9 #3 Bl0bb3r 2010-08-20 22:17
Nope blandead, it's not just about the programs themselves but the compiler.

This just shows that when using GNU C Compiler, both AMD and Intel platforms can perform good. But when using some intel compiler, it will actually reduce the performance of the competition. And guess what, most benchmarks are compiled exactly in that compiler.
 
 
+2 #4 blandead 2010-08-21 20:28
I'm sure there are other factors, but nonetheless if a program is optimized to use all 6 cores it brings huge improvements to these chips over any quad core. what i said was not wrong, if you wanna add more info go ahead, but my logic holds true.
 
 
0 #5 Peter Ong 2010-08-22 04:36
Does database server, Java EE apps benefited from 6 cores? Thanks in advance for anyone casting some light here.
 
 
+1 #6 blandead 2010-08-22 06:22
database server would surely benefit I do not know about Java EE
 
 
0 #7 Jaberwocky 2010-08-22 10:30
Err Chaps.It's all in the cache.I run a 1055T o/clocked to 3.4 Ghz.It's the 6MB cache that is limiting.A baseline for Rendering a scene with just 2 core enabled works out at 100%, so if you enable all 6 cores it should speed the rendering to 300%.IE 3X as fast.Wrong.It actually renders at around 230%.Implying that once the 6MB cache is distributed amongst all 6 cores ,it becomes the bottleneck.If AMD could work on this and double the amount of on board cache then they would have a performer on their hands.
 
 
+5 #8 anno 2010-08-22 12:09
Jaberwocky, it could be that you're right, but that's not necessarily true. There are more resources shared between the cores, for instance the memory interface and northbridge and hypertransport switch. Even with double the cache you will never see 100% scaling in chips, that's practically impossible. You don't see it with Gulftown either, which by the way has less cache per core too, seeing as Intel uses inclusive caches.

Of course I'm sure you understand that Thuban is already quite large and increasing its size would reduce yields, and so making it more expensive than you'd expect. It's all trade offs. :)
 
 
-1 #9 Bl0bb3r 2010-08-22 15:36
Quoting blandead:
I'm sure there are other factors, but nonetheless if a program is optimized to use all 6 cores it brings huge improvements to these chips over any quad core. what i said was not wrong, if you wanna add more info go ahead, but my logic holds true.


Yes, in theory.. but in reality things are quite different. You can optimize all you want, a rigged compiler will screw with those optimizations anyway.
 

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