Page 50
system BIOS. The available IRQ pool is determined by reading the ESCD NVRAM. If more IRQs must be
removed from the IRQ pool, the end user can use these settings to reserve the IRQ by assigning a
[Reserved] setting to it. Onboard I/O is configured by AMIBIOS. All IRQs used by onboard I/O are
configured as [Available]. If all IRQs are set to [Reserved], and IRQ 14/15 are allocated to the onboard PCI
IDE, IRQ 9 will still be available for PCI and PnP devices.
NOTE
IRQ (interrupt Request) lines are system resources allocated to I/O devices. When an I/O device needs to gain
attention of the operating system, it signals this by causing an IRQ to occur. After receiving the signal, when the
operating system ready, the system will interrupt itself and perform the service required by the I/O device.
H/W Monitor
Chassis Intrusion
The field enables or disables the feature of recording the chassis intrusion status and issuing a warning
message if the chassis is once opened. To clear the warning message, set the field to [Reset]. The setting of
the field will automatically return to [Enabled] later.
CPU/SYS Smart Fan Target
The mainboard provides the Smart Fan function which can control the CPU/System fan speed automatically
depending on the current temperature to keep it with in a specific range. You can select a fan target value here.
If the current CPU/System fan temperatures reach the target value, the smart fan function will be activated. It
provides several selections to speed up or cool down automatically.
PC Health Status
CPU/System Temperature, CPU FAN/SYS FAN1 Speed, CPU Vcore, 3.3V, 5V, 12V, 3VSB
These items display the current status of all the monitored hardware devices/components such as CPU
voltage, temperatures and all fans’ speeds.
