Asus P5SD2-A User Manual - Page 32

Legacy USB Support [Enabled]

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The following item appears only when you set the AI Overclocking item to [Manual]. CPU Frequency [200] Displays the frequency sent by the clock generator to the system bus and PCI bus. The value of this item is auto-detected by the BIOS. Use the and keys to adjust the CPU frequency. You can also type the desired CPU frequency using the numeric keypad. The values range from 100 to 450. Refer to the table below for the correct Front Side Bus and CPU External Frequency settings. FSB/CPU External Frequency Synchronization Front Side Bus FSB 1066 FSB 800 FSB 533 CPU External Frequency 266 MHz 200 MHz 133 MHz The following item appears only when you set the AI Overclocking item to [Overclock Profile]. Overclock Options [Standard] Allows selection of CPU overclocking options to achieve desired CPU internal frequency. Configuration options: [Standard] [Overclock 5%] [Overclock 10%] [Overclock 15%] [Overclock 20%] [Overclock 30%] 2.4.2 USB Configuration The items in this menu allows you to change the USB-related features. Select an item then press to display the configuration options. The Module Version and USB Devices Enabled items show the auto-detected values. If no USB device is detected, the item shows None. OnBoard SiS USB 1.1/USB 2.0 Device [Enabled] Allows you to enable or disable the USB 1.1/USB 2.0 device. Configuration options: [Enabled] [Disabled] Legacy USB Support [Enabled] Allows you to enable or disable support for USB devices on legacy operating systems (OS). 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] USB 2.0 Controller Mode [HiSpeed] Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full Speed (12 Mbps). Configuration options: [FullSpeed] [HiSpeed] BIOS EHCI Hand-Off [Enabled] Allows you to enable support for operating systems without an EHCI hand‑off feature. Configuration options: [Disabled] [Enabled] Chapter 2: BIOS information 2-7

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Chapter 2: BIOS information
2-7
The following item appears only when you set the AI Overclocking item to [Manual].
CPU Frequency [200]
Displays the frequency sent by the clock generator to the system bus and PCI bus. The
value of this item is auto-detected by the BIOS. Use the
<+>
and
<->
keys to adjust the CPU
frequency. You can also type the desired CPU frequency using the numeric keypad. The
values range from 100 to 450. Refer to the table below for the correct Front Side Bus and
CPU External Frequency settings.
FSB/CPU External Frequency Synchronization
The following item appears only when you set the AI Overclocking item to [Overclock
Profile].
Overclock Options [Standard]
Allows selection of CPU overclocking options to achieve desired CPU internal frequency.
Configuration options: [Standard] [Overclock 5%] [Overclock 10%] [Overclock 15%]
[Overclock 20%] [Overclock 30%]
2.4.2
USB Configuration
The items in this menu allows you to change the USB-related features. Select an item then
press <Enter> to display the configuration options.
Front Side Bus
CPU External Frequency
FSB 1066
266 MHz
FSB 800
200 MHz
FSB 533
133 MHz
The Module Version and USB Devices Enabled items show the
auto-detected values. If no USB device is detected, the item shows None.
OnBoard SiS USB 1.1/USB 2.0 Device [Enabled]
Allows you to enable or disable the USB 1.1/USB 2.0 device.
Configuration options: [Enabled] [Disabled]
Legacy USB Support [Enabled]
Allows you to enable or disable support for USB devices on legacy operating systems
(OS). 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]
USB 2.0 Controller Mode [HiSpeed]
Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full Speed (12
Mbps). Configuration options: [FullSpeed] [HiSpeed]
BIOS EHCI Hand-Off [Enabled]
Allows you to enable support for operating systems without an EHCI hand-off feature.
Configuration options: [Disabled] [Enabled]