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Values: Disabled, Enabled
Description: If you select Enabled, you can press the Fn key (instead of press and hold) to keep it in a
pressed condition. Then press the function key you want. The action is equivalent to pressing the function
key simultaneously with the Fn key.
• F1–F12 as Primary Function
Values: Disabled, Enabled
Description: If you select Enabled, pressing the function keys directly inputs F1–F12. If you select
Disabled, pressing the function keys directly initiates the special function printed as an icon on each key.
To temporarily switch the above two functions, press Fn+Esc.
Display
• Boot Display Device
Values: ThinkPad LCD, External Display
Description: Select the display device that you want to activate at boot time. This selection is effective for
boot time, password prompt, and ThinkPad Setup.
• Total Graphics Memory
Values: 256 MB, 512 MB
Description: Allocate the total memory which Intel internal graphics shares.
Note: If you select 512 MB, the maximum usable memory might be reduced on the 32–bit operating
system.
• Boot Time Extension
Values: Disabled, 1 second, 2 seconds, 3 seconds, 5 seconds, 10 seconds,
Description: During the boot process, the computer might not detect the external monitors that need more
time to get ready. Select how long you want to extend the boot process.
Power
• Intel (R) SpeedStep technology
Values: Disabled, Enabled
Description: Select the mode of Intel SpeedStep technology at runtime.
– Mode for AC
Values: Maximum Performance, Battery Optimized
Description: Maximum Performance: Always the highest speed
– Mode for Battery
Values: Maximum Performance, Battery Optimized
Description: Battery Optimized: Always the lowest speed
• Adaptive Thermal Management
Description: Select a thermal management scheme to use. The scheme affects fan sound, temperature,
and performance.
– Scheme for AC
Values: Maximize Performance, Balanced
Description: Maximize Performance: Reduce CPU throttling.
– Scheme for Battery
Values: Maximize Performance, Balanced
Chapter 5. Advanced configuration 61