HP Xw8400 HP xw8400 Service and Technical Reference Guide - Page 40
Heading, Option, Description
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Table 3-1 Computer Setup (F10) Utility menu descriptions (continued) Heading Option Description UUID (Universal Unique Identifier) Can only be updated if the current chassis serial number is invalid. (These ID numbers are normally set in the factory and are used to uniquely identify the system.) Keyboard Enables you to set the keyboard locale for System ID entry. OS Security Data Execution Prevention Sets Data Execution Prevention mode in the processors. This mode prohibits code from running in pages that were set up as data pages, and prevents attacks such as buffer overflows. Operating system support is required for this feature. Intel Virtualization Technology Enables Intel Virtualization Technology in the processors. Additional virtualization software (such as VMware) is required to use virtualization. This feature requires a power cycle to be activated. Operating system support is required for this feature. Power OS Power Management Runtime Power Management Enables Enhanced Intel SpeedStep Technology (EIST) and Demand-Based Switching (DBS). This option allows the operating system to tune processor performance states depending on load. Idle Power Savings When set to Enhanced, this option enables C1E, the high-efficiency processor halt state. When the operating system puts a processor in idle mode, its power consumption is reduced. This option reduces power consumption when the load is light. Operating system support is required for this feature. ACPI S3 Support Enables the suspend-to-RAM state. This option is mostly for troubleshooting purposes; the operating system will never enter S3 if one of its drivers does not support that state. Enabled by default; disabled for troubleshooting. ACPI S3 Hard Disk Reset When enabled, the BIOS sends a "drive reset" command to the IDE and SATA drives when resuming from S3, before returning to the operating system. ACPI S3 PS2 Mouse Wake Up Allows the PS/2 mouse to wake from ACPI S3. PS/2 keyboards are always enabled. (Disabling this option means that nudging the mouse will not trigger a system wake.) USB Wake on Device Insertion Enables the USB controllers to generate a wake event when a device is plugged in while the system is in an ACPI sleep state. The matching USB controller must be set to wake the system (from Windows, this is done from Device Manager, using the Power Management tab for that controller, and setting the Allow this device to wake up the system check box). Hardware Power Management SATA Power Management Enables you to enable or disable SATA power management. This option still works when the controller is in RAID + AHCI mode. Thermal Fan Idle Mode This setting changes the minimum fan speed. The fans are still automatically controlled. 30 Chapter 3 System management ENWW