Asus P8B-X User Guide - Page 78

4.5.8 Intel TXT(LT) Configuration Aptio Setup Utility - Copyright (C) 2010 American Megatrends, Inc. Advanced Intel Trusted Execution Technology Configuration Intel TXT support only can be enabled/disabled if SMX is enabled. VT and VT-d support must also be enabled prior to TXT. Secure Mode Extensions (SMX) Enabled Enables Legacy USB support. AUTO option disables legacy support if no USB devices are connected. DISABLE option will keep USB devices available only for EFI applications. Intel TXT(LT) Support [Disabled] Intel TXT(LT) Support [Disabled] Allows you to enable or disable the Intel Trusted Execution Technology (TXT) feature. Configuration options: [Disabled] [Enabled] The Intel TXT(LT) Support item requires a Trusted Platform Module (TPM) to be installed on the motherboard to enable. 4.5.9 USB Configuration Aptio Setup Utility - Copyright (C) 2010 American Megatrends, Inc. Advanced USB Configuration USB Devices 1 Mouse, 2 Hubs Legacy USB Support EHCI Hand-off [Enabled] [Disabled] Enables Legacy USB support. AUTO option disables legacy support if no USB devices are connected. DISABLE option will keep USB devices available only for EFI applications. USB hardware delays and time-out: USB transfer time-out [20 sec] Device reset time-out [20 sec] Device power-up delay [Auto] The USB Devices item shows the auto-detected values. If no USB device is detected, the item shows None. Legacy USB Support [Enabled] Allows you to enable or disable support for legacy USB devices. Setting to [Auto] allows the system to detect the presence of USB devices at startup. If detected, the USB controller legacy mode is enabled. If no USB device is detected, the legacy USB support is disabled. Configuration options: [Disabled] [Enabled] [Auto] EHCI Hand-off [Disabled] Enables or disables the BIOS EHCI hand-off support. Configuration options: [Disabled] [Enabled] 4-20 Chapter 4: BIOS setup