ASUS UX21E series manually sets NVIDIA Optimus dual display. You can manually switch settings for NVIDIA Optimus through the following method, taking 3D Mark 06 as an example:

　1. Open the NVIDIA Control Panel and select "Manage 3D Settings".

2. Under the "Program Settings" tab, click "Add" to select the program you want to customize.

3. Select the preferred graphics processor for this program.

　Among them:

　a. Use global settings------depends on the selection in the "Global Settings" tab.

b. High-performance NVIDIA processor ------- independent display chip operation.

c. Integrated graphics-------The integrated display chip works.

4. Adjust the specific work details in "Determine the settings of the program (C)", which is only adjustable under high-performance NVIDIA processors.

5. After the settings are completed, click Apply.

In addition to the above settings, there is a simpler method: right-click the application that needs to be run. The mail menu has a "Run with graphics processor" option by default. You can directly choose which one to use here. Display the core to run the program.