When running the OpenGL Nexuiz game, Ubuntu 11.04 continued burning through more power than Apple Mac OS X "Snow Leopard" did and to some extent, Windows 7 too.
Microsoft Windows 7 Pro SP1 had the highest frame-rate when running Nexuiz on each OS at 1920 x 1080, but on none of the platforms was the HD resolution playable when HDR was enabled.
At least for this Apple Mac Mini, Mac OS X is more power efficient than Windows 7 and Ubuntu 11.04, but it should not be too much of a surprise at all.
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