User`s manual
Chapter 4: AMI BIOS
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as bootable disks. If this item is set to Disabled, the ROM BIOS of the host adap-
tors will not capture Interrupt 19, and the drives attached to these adaptors will not
function as bootable devices. The options are Enabled and Disabled.
Power Conguration
Power Button Function
This feature controls how the system shuts down when the power button is pressed.
Select 4_Seconds_Override for the user to power off the system after pressing and
holding the power button for 4 seconds or longer. Select Instant Off to instantly
power off the system as soon as the user presses the power button. The options
are 4 Second Override and Instant Off.
Restore on AC Power Loss
Use this feature to set the power state after a power outage. Select Power-Off for
the system power to remain off after a power loss. Select Power-On for the system
power to be turned on after a power loss. Select Last State to allow the system
to resume its last power state before a power loss. The options are Power-On,
Power-Off and Last State.
Resume on RTC Alarm
This feature enables or disables system resume on RTC (Real Time Clock) alarm.
The options are Disabled and Disabled.
Processor & Clock Options
Warning: Take Caution when changing the Advanced settings. An incorrect
value, a very high DRAM frequency or an incorrect DRAM timing setting
may cause system to become unstable. When this occurs, revert to the
setting to its manufacture default setting.
Clock Spread Spectrum
If Enabled, the BIOS will monitor the level of Electromagnetic Interference caused
by the components and will attempt to decrease the interference whenever needed.
The options are Enabled and Disabled.
Hardware Prefetcher (Available when supported by the CPU)
If set to Enabled, the hardware prefetcher will prefetch streams of data and instruc-
tions from the main memory to the L2 cache to improve CPU performance. The
options are Disabled and Enabled.