One slightly surprising spec in the new 15-inch MacBook Pro line-up is that even the base model got an AMD GPU. Previously, Apple has offered only integrated GPU in the base model, reserving discrete graphics for the higher-specced models.
John Gruber noticed that the ArsTechnica review explains this: it was the only way to allow the machine to drive two 5K monitors. And the reason for that is that Apple had to use something of a workaround to achieve it …
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