Final set of results from the Power Management Blueprint
Colin Ian King
colin.king at canonical.com
Wed Mar 28 13:46:23 UTC 2012
Now beta2 is nearly here I ran some (very simple) tests last night and
this morning on Unity 2D vs 3D to see how they compare in terms of power
consumption on a HP Mini 210 (Atom N450) and a Lenovo X220i
For 3D animation and busy rendering (which we suspect this keeps the
compositor busy) Unity 3D consumes more power than 2D. This is more
apparent on newer Intel Sandybridge chipsets because 2D seems to keep
the GPU powered down which is known to save 25-40% of total system power
due to the i915 RC6 power saving mode.
For some operations, such as desktop zooming, 2D is more expensive
because we don't have GPU assist to scale images.
Finally, for idle systems, 2D and 3D are comparable in power consumption.
..but see the unity-beta2-2d-vs-3d-results.txt for more details. Oh,
and the sigma (std.deviation) is rendered poorly on web-browsers.
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