Lenovo B570e Notebook - Manual (Page 29)

Using passwords
Using passwords helps prevent your computer from being used by others. Once you set a password and
enable it, a prompt appears on the screen each time you power on the computer. Enter your password at the
prompt. The computer cannot be used unless you enter the correct password.
Note: This password can be from one to seven alphanumeric characters in any combination.
For more information about how to set the password, refer to the online help information system on the
right screen of the BIOS.
Note: To enter the BIOS, press F2 when the Lenovo logo appears on the screen while the computer is
starting up.
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.
Note: Some Lenovo B470e models are configured with the NVIDIA GeForce 405M graphics processor.
Because of the subtle design change between NVIDIA GeForce 405M and NVIDIA GeForce 315M, some
third-party applications might detect GeForce 405M as GeForce 315M. To know the actual graphics
processor configuration on your model, view the configuration information in Windows Device Manager.
Chapter 2 . Learning the basics 15