hmm it's strange that it has two separate GPUs, as the tegra 2 is a system on a chip design. This could mean that it's not using a tegra chip or that nintendo have modified it so they have two sets of the GPU component as separate chips, but that would defeat the purpose of having a system on a a chip. I guess it could be that the GPUs are not traditional GPUs and are used for the 3D effect (and/or Anti-aliasing etc) but that seems a bit strange.
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