Swiping from the home screen through the app grid was smooth, and in fact, all the graphical transitions we saw -- from the unlock screen to opening various apps -- were quite fluid as well.

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By contrast an Nvidia graphics processing unit, or GPU, renders graphics by simultaneously hashing out the same problem for multiple pixels: textures, lighting and smooth rendering of shapes flying across the screen.

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It's not obvious, but it is there -- especially on the notifications pull-down, which is smooth as a whistle as it moves across the main screen, whereas it flickers ever so slightly on the Android 4.0 One X.

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