Dell OptiPlex 755 User's Guide - Page 284

Performance HyperThreading (On default) Multiple CPU Core (On default) Virtualization (Off default) VT for Direct I/O Trusted Execution Virtual Appliance VA Config Lock SpeedStep (Off default) Limit CPUID Value (Off default) HDD Acoustic Mode (Bypass default) The hyperthreading option is displayed if the installed processor supports hyperthreading. Determines whether the physical processor appears as one or two logical processors. The performance of some applications improves with additional logical processors. On enables hyperthreading. Determines whether the processor will have one or two cores enabled. On enables the second core. Specifies whether a virtual machine monitor (VMM) can utilize the additional hardware capabilities provided by Intel Virtualization technology. Specifies whether a Virtual Machine Monitor (VMM) can use the additional hardware capabilities provided by Intel Virtualization Technology for Direct IO. Default is Off. Specifies whether a Measured Virtual Machine Monitor (MVMM) can use additional hardware capabilities provided by Intel Trusted Execution Technology. Default is Off. Specifies whether a Virtual Appliance can use the additional hardware capabilities provided by Intel Embedded Information Technology. Default is Off. Specifies whether the Virtual Appliance ACPI Configuration Interface is locked or unlocked. This option has no effect when Virtual Appliance is disabled. Default is Unlocked. Enables Intel® SpeedStep® for all supported processors in the computer. This setting changes the processor power consumption and frequency. NOTE: This option may not be available on your computer. Limits the max value the processor standard CPUID function will support. Some operating systems won't complete installation when the max CPUID function supported is greater than 3. • Quiet - The hard drive operates at its most quiet setting. • Performance - The hard drive operates at its maximum speed. • Bypass - Your computer does not test or change the current acoustics mode setting. • Suggested - The hard drive operates at the level suggested by the drive manufacturer. NOTE: Switching to performance mode may cause the drive to be noisier, but its performance is not affected. Changing the acoustics setting does not alter your hard drive image. Security Unlock Setup When an administrator password is being used, allows the user access to modify system setup settings. Enter the administrator password at the prompt to unlock system setup. If the correct password is not entered here, the user can view but not modify system setup fields. 284 Advanced Features