Lenovo ThinkPad T420 4236 User Manual page 202

Table 8. Config menu items (continued)
Display
184
User Guide
Boot Display Device
Graphics Device
OS Detection for NVIDIA
Optimus
• Off
• ThinkPad LCD
• Analog (VGA)
• Digital on ThinkPad
• Digital 1 on dock
• Digital 2 on dock
• Integrated Graphics
• Discrete Graphics
• NVIDIA Optimus
• Disabled
• Enabled
If you select "On",
NumLock is always
enabled.
If you select "Off",
NumLock is always
disabled.
Note: Power-On NumLock
will be displayed if you
select "Synchronized" at
the ThinkPad NumLock.
Select the display device
that is to be active at boot
time. This selection is
effective for boot time,
password prompt, and
ThinkPad Setup.
"Digital on Thinkpad"
is DisplayPort on your
computer.
"Digial 1 on dock" and
"Digital 2 on dock" are
DisplayPort or DVI on
docking station.
Integrated Graphics will
achieve longer battery life,
and Discrete Graphics
enhances performance.
NVIDIA Optimus runs as
Integrated Graphics mode
and Discrete Graphics is
enabled on demand.
Note: NVIDIA Optimus
mode should only be
selected if you are using a
Windows 7 model.
System BIOS automatically
switches Graphics device
setting to NVIDIA Optimus
mode if the OS supports
the feature, and to Discrete
Graphics if the OS does not
support it.