Lenovo G770 Notebook - Manual (Page 25)

Chapter 2. Learning the basics
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4 On the Switchable Graphics page, the currently active GPU is displayed
under the current active graphics processing unit. You can click
High-performance GPU
or Power-Saving GPU under Choose a
Graphics Processing Unit to switch the graphics processor.
Switching between Mode 1 and Mode 2
Switch between the two modes as follows:
1 Start your computer under the Windows 7 operating system.
2 Click Start → All Programs → Catalyst Control Center, and run the CCC.
3 On the Catalyst Control Center setting page, click Power → Switchable
Graphics Method , choose Select the graphics processor manually or
based on power source , and click Apply.
4 On the Switchable Graphics dialog box that appears, click Change to
switch between the two modes.
5 On the contrary, you can switch back to Mode 1 from Mode 2.
Note: It may take several seconds to switch between Mode 1 and Mode 2.
Prior to switching between the two modes or manual switching between the two
GPUs, it is recommended that you close any running applications.
Under the Windows XP or Windows Vista operating system, none of the
configurations supports switching between graphics processors, and they can work
only under the mode of integrated GPU.