(*) on a mobile Core 2.
To those wondering if the numbers are off, no they are not off. In fact, testing under each case was done twice.
(*) on a mobile Core 2.
So far everybody has been arguing over GPUs.
May other concern, however, is that my CPU is supposed to have 8 power states. Under Linux I only have 3, 550MHz, 1100MHz and 2200MHz (AMD Turion Ultra X2). Knowing that power consumption is proportional to frequency I would love to see a ~275MHz option. Others are welcome, too.
Point is, how is it possible that AMD doesn't show all available options?
I can reduce my Eee PC 1000HE to *6 watts* utilizing a combination of CPUFreq, SHE (bus downclock), and C states. Working with the Eeebuntu team, I integrated this technology into Eeebuntu 3 and EB4 with great success.
The core flaw with his logic is that you are performing more operations faster, but if you lower the clock rate you perform those same operations at a slower rate but at a reduced power cost.
For the 1000HE it means the difference between playing video non-stop for 5 hours without down clocking, and playing video non-stop for 9.5 hours with down clocking. I have similar results with the Celeron CPU used in the 1000HD and countless others as reported by our users.
- Writing 25.00 suggests that you did the measurements with an instrument which has a resolution of 0.01. Seeing that all numbers end in .00, I suppose that this is not the case.
- I don't understand how 24.00W and 25.00W (especially with .00) lead to the conclusion that Ubuntu is 9% more power hungry.
Ubuntu in default does very bad on power saving, I have to manually tweak a lot of places in 9.10 for it to achieve 9W idle power. I don't know why those laptop related features all get disabled in laptop mode, what are they thinking?
I did a similar test a couple of days ago with my older laptop using the open source radeon driver in ubuntu and WinXP.
I find it odd that my older bulkier laptop consumes less power than a netbook.
Code:Power Consumption (in watts) WinXP Ubuntu (Lucid Kernel) Ubuntu (2.6.34) Boot 29-32 27-50 29-53 Idle Desktop / Wifi On 18 19 18 Idle Desktop / Wifi Off 15 18 17 Lid Closed / Wifi On 15 12.1 12.3 Lid Closed / Wifi Off 13 11.3 11.1 Hd Sleep / Lid Open / Wifi Off - 16.1 15.0 Hd Sleep / Lid Closed / Wifi Off - 9 9
And in this test the CPU wasn't idling!