Dell OptiPlex 990 (Early 2011) - Manual (Page 66)

Security
Chassis Intrusion Allows you to enable or disable the chassis intrusion feature.
You can set this option to:
• Clear Intrusion Warning — Enabled by default if
chassis intrusion is detected.
• Disable
• Enable
• On-Silent — Enabled by default if chassis intrusion is
detected.
CPU XD Support Allows you to enable or disable he execute disable mode of
the processor. This option is enabled by default.
OROM Keyboard
Access Allows you to determine whether you access the Option ROM
Configuration screens via hotkeys during boot. Specifically,
these settings are capable of preventing access to Intel RAID
(CTRL+I) or Intel Management Engine BIOS Extension (CTRL
+P/F12)
• Enable — User may enter OROM configuration
screens via the hotkey.
• One-Time Enable — User may enter OROM
configuration screens via the hotkeys on next boot
only. After next boot, the setting will revert to disabled.
• Disable — User may not enter OROM configuration
screens via the hotkey.
This option is set to Enable by default.
Admin Setup Lockout Allows you to enable or disable the option to enter Setup when
an Admin password is set. This option is not set by default.
Performance
Multi Core Support This field specifies whether the process will have one or all
cores enabled. The performance of some applications will
improve with the additional cores. This option is enabled by
default.
Intel® SpeedStep™ Allows you to enable or disable the Intel SpeedStep mode of
the processor. This option is enabled by default.
C States Control Allows you to enable or disable the additional processor sleep
states. This option is enabled by default.
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