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NVIDIA Optimus Graphics enables a dynamic switch, that is, a switch with no need to restart your computer
between High Performance and Energy Saving Graphics.
Note: To use the DisplayPort feature or DVI monitor on the docking station, you need to switch to High
Performance Graphics.
Switching the Graphics Processing Unit
If your computer supports NVIDIA Optimus Graphics, the Graphics Processing Unit is switched automatically
depending on the settings of the power plan you use.
Note: If your computer is running Windows XP, you cannot switch the GPU.
Using audio features
Your computer is equipped with the following:
• Combo audio jack, 1/8 inch (3.5 mm) in diameter
• Built-in stereo speakers
• Built-in dual array digital microphone
Your computer also has an audio chip that enables you to enjoy various multimedia audio features:
• Compliant with Intel High Denition Audio.
• Recording and playback of PCM and WAV les in 16-bit or 24-bit format.
• Playback of a WAV le at a sample rate of 44.1KHz to 192 KHz.
• Playback of MIDI les through a Wave table synthesizer under Microsoft Windows operating systems.
• Playback of MP3 les through the Windows Media Player or a software MP3 player.
• Recording from various sound sources, such as a headset attached either to the combo audio jack of
your computer or to the microphone jack of the ThinkPad Mini Dock Series 3, the ThinkPad Mini Dock
Plus Series 3, or the ThinkPad Mini Dock Plus Series 3 (170 W).
Note: The combo audio jack does not support a conventional microphone.
The following table shows which functions of the audio devices attached to the jacks on your computer or
docking station are supported.
Table 6. Audio feature list
Headset with a 3.5 mm
4-pole plug
Conventional headphone Conventional microphone
Combo audio jack
Headphone and
microphone functions
supported
Headphone function
supported
Not supported
Headphone jack of the
docking station
Only headphone function
supported
Microphone function not
supported
Headphone function
supported
Not supported
Microphone jack of the
docking station
Not supported Not supported
Microphone function
supported
Chapter 2. Using your computer 77