Lenovo B490 Laptop User Guide - Lenovo B490, B590, B43xx - Page 33
Using USB connectors, Using the NVIDIA Optimus Graphics feature
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Note: If you do not remove the card from your computer after you eject the card from the Windows operating system, the card can no longer be accessed. To access the card, you must remove it once, then insert it again. Using USB connectors Your computer is preinstalled with USB connectors compatible with USB 1.1, 2.0, or 3.0 devices. Note: When using a high power consumption USB device such as a USB optical drive, use the power adapter that comes with the device. Otherwise, the device may not be recognized, and the system might be shut down. Using the NVIDIA Optimus Graphics feature Some Lenovo notebook computers support NVIDIA Optimus Graphics. NVIDIA Optimus Graphics enables a dynamic switch, that is, a switch with no need to restart your computer between High Performance and Energy Saving. Switching the Graphics Processing Unit If your computer supports NVIDIA Optimus Graphics, the Graphics Processing Unit is switched automatically depending on the power settings you use. Chapter 2. Using your computer 19