Lenovo ThinkPad Edge E520 (English) User Guide - Page 136

ThinkPad LCD, Set the Optical Drive

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Table 4. Config menu items (continued) Menu item Submenu item Change to "F1-F12 keys" Display Boot Display Device Graphics Device OS Detection for Switchable Graphics Power Intel SpeedStep® technology (Intel SpeedStep mounted models only) Optical Drive Speed CPU Power Management PCI Express Power management Selection Comments • Default • Legacy If you select "Default", pressing F1-F12 initiates special functions illustrated on each key. If you select "Legacy", you can use F1-F12 as standard function keys. • ThinkPad LCD • Analog (VGA) • Digital on ThinkPad Select the display device that is to be active at boot time. This selection is effective for boot time, password prompt, and ThinkPad Setup. • Integrated Graphics • Switchable Graphics Integrated Graphics provides longer battery life, and Switchable Graphics enhances performance. • Disabled • Enabled If you select "Enabled," the system UEFI automatically switches the graphics device setting to Switchable Graphics mode if the operating system supports this feature, and to Integrated Graphics mode if the operating system does not support this feature. • Disabled • Enabled Select the mode of Intel SpeedStep technology in the user UEFI at runtime. Mode for AC • Maximum Performance • Battery Optimized Mode for Battery • Maximum Performance • Battery Optimized • High Performance • Normal • Silent • Disabled • Enabled • Disabled • Enabled Set the Optical Drive Speed. Unless this power-saving feature is disabled, it stops the processor clock automatically when there is no system activity. You usually don't need to change this function. Enables or disables a feature that automatically adjusts power management when there is no PCI 118 User Guide

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Table 4. Config menu items (continued)
Menu item
Submenu item
Selection
Comments
Change to “F1–F12 keys”
•
Default
•
Legacy
If you select “Default”,
pressing F1–F12 initiates
special functions illustrated
on each key.
If you
select “Legacy”, you can
use F1–F12 as standard
function keys.
Boot Display Device
•
ThinkPad LCD
•
Analog (VGA)
•
Digital on ThinkPad
Select the display device
that is to be active at boot
time.
This selection is
effective for boot time,
password prompt, and
ThinkPad Setup.
Graphics Device
•
Integrated Graphics
•
Switchable Graphics
Integrated Graphics
provides longer battery life,
and Switchable Graphics
enhances performance.
Display
OS Detection for
Switchable Graphics
•
Disabled
•
Enabled
If you select “Enabled,” the
system UEFI automatically
switches the graphics
device setting to Switchable
Graphics mode if the
operating system supports
this feature, and to
Integrated Graphics mode if
the operating system does
not support this feature.
Intel SpeedStep
®
technology (Intel
SpeedStep mounted
models only)
•
Disabled
•
Enabled
Mode for AC
•
Maximum Performance
•
Battery Optimized
Mode for Battery
•
Maximum Performance
•
Battery Optimized
Select the mode of Intel
SpeedStep technology in
the user UEFI at runtime.
Optical Drive Speed
•
High Performance
•
Normal
•
Silent
Set the Optical Drive
Speed.
CPU Power Management
•
Disabled
•
Enabled
Unless this power-saving
feature is disabled, it
stops the processor clock
automatically when there
is no system activity. You
usually don't need to
change this function.
Power
PCI Express Power
management
•
Disabled
•
Enabled
Enables or disables a
feature that automatically
adjusts power management
when there is no PCI
118
User Guide