Featured Articles

AMD Never Settle Forever bundle hits 200-series cards

AMD Never Settle Forever bundle hits 200-series cards

AMD’s Never Settle bundles have been around for a while and the community response has been extremely positive. When AMD launched…

More...
AMD shipping Beema APUs

AMD shipping Beema APUs

According to Lisa Su, SVP & GM, Global Business Units at AMD, Beema notebook parts have started shipping to manufacturers last…

More...
IHS teardown reveals Galaxy S5 BOM

IHS teardown reveals Galaxy S5 BOM

Research firm IHS got hold of Samsung’s new flagship smartphone and took it apart to the last bolt to figure out…

More...
Galaxy S5, HTC One M8 available selling well

Galaxy S5, HTC One M8 available selling well

Samsung’s Galaxy S5 has finally gone on sale and it can be yours for €699, which is quite a lot of…

More...
KFA2 GTX 780 Ti Hall Of Fame reviewed

KFA2 GTX 780 Ti Hall Of Fame reviewed

KFA2 gained a lot of overclocking experience with the GTX 780 Hall of Fame (HOF), which we had a chance to…

More...
Frontpage Slideshow | Copyright © 2006-2010 orks, a business unit of Nuevvo Webware Ltd.
Friday, 17 July 2009 06:40

AMD Phenom II under-voltaging - 2 Dual- and Triple-Cores

Written by Eliot Kucharik
ImageImage

Review: How to get the most performance at the lowest power consumption



Dual and triple-core CPUs can't be that very efficient compared to quad-cores. These CPUs are all crippled quad-cores, due to the architecture the cores are disabled but have to run regardless, otherwise the memory-controller could not be accessed. This is a design flaw, hopefully fixed with the next AMD family, so cores can really be shut off completely. So if you have to buy a smaller CPU due to budget constraints go for a triple-core.

The CPUs normally run with about 1.300V VCore which is quite high. Some CPUs will come with 1.250V but all our CPUs run with at least 1.300V. The energy-efficient 705e runs with 1.175V which has shown to save some energy. Let's see how low we can get. Please note, that not any CPU will get that low or some will go even lower. Also make sure you have a board which will support under-voltaging. Just decrease the CPU voltage, don't fiddle with the CPU VID voltage, because it will increase idle-power consumption. We have no idea how that is calculated, but the VID is also responsible for the idle-voltage. 


The newly introduced Phenom II X2 went down to 1.180V from it's original 1.325V:
Image

Image

The 705e went down from 1.175V  to 0.995V, that's quite nice.
Image

Image

The 720 did well too, down to 1.150V.
Image

Image




(Page 2 of 4)
Last modified on Friday, 17 July 2009 12:00
blog comments powered by Disqus

Comments  

 
0 #1 www.kbcomputer.at 2011-01-25 08:45
thx for the comparison!
www.kbcomputer.at
 

To be able to post comments please log-in with Disqus

 

Facebook activity

Latest Commented Articles

Recent Comments