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Intel Desktop Board D975XBX Product Guide
18
PCI and PCI Express* Auto Configuration
If you install a PCI/PCI Express add-in card in your desktop board, 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.
Related Links:
For instructions on resetting the password, see Clearing Passwords on page 50.
Chassis Intrusion
The desktop 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 28 on page 48 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:
⎯ Fan connectors
⎯ Suspend to RAM (Instantly Available PC technology)
⎯ Resume on Ring
⎯ Wake from USB
⎯ Wake from PS/2 keyboard/mouse
⎯ PME# wakeup support