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EIST
EIST (Enhanced Intel SpeedStep Technology) allows the system to dynamically adjust processor
voltage and core frequency, which can result in decreased average power consumption and
decreased average heat production.
When disabled, the processor will return the actual maximum CPUID input value of the processor
when queried.
PCI/PCIE Device Configuration
PCI Latency Timer
This item controls how long each PCI device can hold the bus before another takes over. When set
to higher values, every PCI device can conduct transactions for a longer time and thus improve the
effective PCI bandwidth. For better PCI performance, you should set the item to higher values.
XHCI Mode
This setting disables/enables the USB XHCI controller. The eXtensible Host Controller Interface
(XHCI) is a computer interface specification that defines a register-level description of a Host
Controller for Universal Serial bus (USB), which is capable of interfacing to USB 1.0, 2.0, and 3.0
compatible devices. The specification is also referred to as the USB 3.0 Host Controller
specification.
USB 2.0(EHCI) Support
These settings disable/ enable the USB EHCI controller. The Enhanced Host Controller Interface
(EHCI) specification describes the register-level interface for a Host Controller for the USB 2.0.
Legacy USB Support
Set to [Enabled] if you need to use any USB 1.1/2.0 device in the operating system that does not
support or have any USB 1.1/2.0 driver installed, such as DOS and SCO Unix.
Audio Controller
This setting enables/disables the onboard audio controller.
Launch OnBoard LAN OpRom
These settings enable/disable the initialization of the onboard LAN Boot ROM during bootup.
Selecting [Disabled] will speed up the boot process.