The new MacBook Pro has two separate graphics subsystems inside of it. One, the NVIDIA GeForce 9400M, is the same one found in the new MacBook and MacBook Air models. It�s less powerful�and uses less power. The other, the NVIDIA GeForce 9600M GT, is a much faster, higher-performance graphics processor...
Within the Energy Saver preference pane, you can choose between �Better battery life� (the 9400M) and �Higher performance� (the 9600M GT) for graphics. However, this isn�t a switch you can do on the fly�nor can you set the system to use one when you�re on battery power and the other when you�re attached to an outlet. In fact, to switch between the two cards requires you to log out of your user account and log back in.
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