Forget horsepower, forget miles per gallon: the key metric for judging the Nissan Urge is polygons per second, an index of performance for video games.
Five hundred million polygons a second is the rating for the Microsoft Xbox 360 video game system tucked away in the car's trunk. It pumps out images fast enough to generate dizzyingly sharp scenes of city streets and speeding cars on a display that folds down from above the windshield.
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