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Intel Desktop Board D955XCS Product Guide
Expandability
The desktop board supports the following:
•
One PCI Express x16 add-in card
•
One PCI Express x4 add-in card (routed to the physical x16 connector)
•
One PCI Express x1 add-in card
•
Four PCI bus add-in cards
Related Links
For information about installing the PCI Express x16 card, see page 37 in Chapter 2.
BIOS
The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, the PCI and IDE
auto-configuration utilities, and the video BIOS.
See Chapter 3 on page 59 for more information about the BIOS.
Serial ATA and IDE Auto Configuration
If you install a Serial ATA or IDE device (such as a hard drive) in your desktop board, the auto-
configuration utility in the BIOS automatically detects and configures the device for your computer.
You do not need to run the BIOS Setup program after installing a Serial ATA or IDE device. You
can override the auto-configuration options by specifying manual configuration in the BIOS Setup
program.
When booting from a Serial ATA device, Serial ATA connector 0 is the first boot device and Serial
ATA connector 3 is the last boot device by default.
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.
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