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The OptiPlex 7040 is technically a PC tower ... Dell still manages to pack a lot into the chassis, especially on power. The model we tested is pretty tricked out. It includes a quad-core, Core i7 ...

For Dell's Precision Tower 3620, a different Intel processor ... as well -- including the Xeon E3 and the more powerful Core i7. On graphics, the ThinkStation P410 comes with the Nvidia Quadro ...