Dell OptiPlex 780 Service Manual page 19

The Operating System may allocate resources even though the setting is disabled.
Serial Port #2 Identifies and defines the serial port settings. You can set the serial port to:
Disable
Auto (default)
COM2
COM4
The Operating System may allocate resources even though the setting is disabled.
Miscellaneous Enables or disables the following onboard devices:
Devices
Front USB
Rear Dual USB
Rear Quad USB
PCI slots
Audio
Video
Primary This field determines which video controller will become the primary video controller when 2 controllers are available in the system. This selection
Video matters only if there are 2 video controller present.
Auto(default) - Use the add-in video controller.
Onboard/Card - Use the integrated video controller unless a Graphic care is installed. A PCI Express Graphic(PEG) card will override and disable
the integrated video controller.
Performance
Multi Core This field specifies whether the processor will have one or all cores enable. The performance of some application will improve with the additional
Support cores.
Intel® This Option enables or disables the Intel® SpeedStep™ mode of the processor. When disabled, the system is placed into the highest performance
SpeedStep™ state and the Intel® SpeedStep™ applet or native operating system driver are prevented from adjusting the processor's performance. When enable.
the Intel® SpeedStep™, enabled CPU is allowed to operate in multiple performance states.
This option is disabled by default.
This option enables or disables additional processor sleep states. The operating system may optionally use these for additional power saving when
C States
idle.
Control
This option is disabled by default.
Limit CPUID This field limits the maximum value the processor Standard CPUID Function will support. Some operating systems will not complete installation when
Value the maximum CPUID Function supported is greater than 3.
This option is disabled by default.
HDD This option allows you to optimize your hard drives performance and acoustic noise level based on your personal preferences.
Acoustic
Bypass(default)- Do nothing (needed for older drives)
Mode
Quiet- The drive is slower, but quieter.
Suggested - Allow drive manufacturer to select the mode.
Performance- The drive is faster, but possibly noisier.
Virtualization Support
This Option specifies whether a Virtual Machine Monitor (VMM) can utilize the additional hardware capabilities provided by Intel® Virtualization
Technology.
Virtualization
Enable Intel® Virtualization Technology - This option is disabled by default.
VT for Direct Enables or disables the Virtual Machine Monitor (VMM) from utilizing the additional hardware capabilities provided by Intel® Virtualization technology
I/O for direct I/O.
Enable Intel® Virtualization Technology for Direct I/O - This option is disabled by default.
Field specifies whether a Measured Virtual Machine(MVMM) can utilize the additional hardware capabilities provided by Intel® Trusted Execution
Trusted
Technology. The TPM Virtualization Technology and Virtualization Technology for Direct I/O must be enable to use this feature.
Execution
Enable Intel® Trusted Execution Technology - This option is disabled by default.
Security
Administrative Provides restricted access to the computer's system setup program in the same way that access to the system can be restricted with the
Password System Password option.
This option is not set by default.
System Password Displays the current status of the system's password security feature and allows a new system password to be assigned and verified.
This option is not set by default.
Password Changes Enables or disables the user from changing the system password without the administrative password.
This option is enabled by default.
TPM Security Enables or disables the trusted platform module (TPM) security.