Dell Alienware M17x R3 (Early 2011) - Manual (Page 59)

CHAPTER 3: USING YOUR LAPTOP
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Advanced Menu
Intel SpeedStep
Allows you to enable or disable the Intel SpeedStep technology.
Disabling this feature may improve performance, but will
greatly reduce battery life.
Virtualization
Allows you to enable or disable the Intel Virtualization
technology.
USB Emulation
Allows you to enable or disable the USB emulation feature. This
feature defines how the BIOS, in the absence of a USB-aware
operating system, handles USB devices. USB emulation is
always enabled during POST.
NOTE: You cannot boot any type of USB device (floppy, hard
drive, or memory key) when this option is off.
USB Wake Support
Allows you to enable USB devices to wake the computer from
standby or to disable the USB wake support feature.
NOTE: If USB Powershare is enabled, a device connected to the
USB Powershare connector may not wake the computer.