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Chapter 4: BIOS
RDTSC Instruction embedded in a CPU. The High Precision Event Timer is used to replace the 8254 Programmable Interval Timer. The default setting is No.
USB Function
Select Enabled to enable the function of USB devices specified. The settings are Enabled and Disabled.
Legacy USB Support
This setting allows you to enable support for Legacy USB devices. The settings are Enabled and Disabled.