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Desktop Board Features 
 
 
23 
PCI and PCI Express Auto Configuration 
If you install a PCI/PCI Express add-in card in your computer, the PCI/PCI Express auto-
configuration utility in the BIOS automatically detects and configures the resources (IRQs, DMA 
channels, and I/O space) for that add-in card.  You do not need to run the BIOS Setup program after 
you install a PCI/PCI Express add-in card. 
Security Passwords 
The BIOS includes security features that restrict whether the BIOS Setup program can be accessed 
and who can boot the computer.  A supervisor password and a user password can be set for the 
BIOS Setup and for booting the computer, with the following restrictions:   
•  The supervisor password gives unrestricted access to view and change all Setup options.  If 
only the supervisor password is set, pressing <Enter> at the password prompt of Setup gives the 
user restricted access to Setup. 
•  If both the supervisor and user passwords are set, you must enter either the supervisor password 
or the user password to access Setup.  Setup options are then available for viewing and 
changing depending on whether the supervisor or user password was entered. 
•  Setting a user password restricts who can boot the computer.  The password prompt is 
displayed before the computer is booted.  If only the supervisor password is set, the computer 
boots without asking for a password.  If both passwords are set, you can enter either password 
to boot the computer. 
Chassis Intrusion 
The board supports a chassis security feature that detects if the chassis cover has been removed.  
The security feature uses a mechanical switch on the chassis that can be connected to the chassis 
intrusion header on the desktop board.  See Figure 22 on page 44 for the location of the chassis 
intrusion header. 
Power Management Features 
Power management is implemented at several levels, including: 
•  Advanced Configuration and Power Interface (ACPI) 
•  Hardware support: 
⎯  Power connectors 
⎯  Fan connectors 
⎯  Suspend to RAM (Instantly Available PC technology) 
⎯  Resume on Ring 
⎯  Wake from USB 
⎯  Wake from PS/2 keyboard/mouse 
⎯  PME# wakeup support 
ACPI 
ACPI gives the operating system direct control over the power management and Plug and Play 
functions of a computer.  The use of ACPI with the desktop board requires an operating system that 
provides full ACPI support.