THE HP Z8 G4 IS ABOUT THE SIZE OF A CARRY-ON BAG, BUT FIVE years ago, a computer of its oomph would have been as large as a steamer trunk. Size isn't a big deal to Pixar animators, Formula One engineers, and others who use this kind of machine professionally, but it does make the desktop more reasonable for aspiring visual artists and die-hard PC gamers. The spec sheet alone can't quite convey just how much power is packed into this 18-inch-tall box. Here's how its maxed-out configuration compares to the machines we interact with every day.
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