2.4.6 USB Configuration Asus prime Asus M3A78

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Chapter 2: BIOS setup

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2.4.5 

PCI PnP

The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices. 

The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA 

devices, and setting the memory size block for legacy ISA devices.

The Module Version and USB Devices Enabled items show the  auto-detected values. If 

no USB device is detected, the item shows None.

USB Functions [Enabled]

Allows you to enable or disable the USB Functions.  

Configuration options: [Enabled] [Disabled]

USB 2.0 Controller [Enabled]

Allows you to enable or disable the USB 2.0 Controller. 

Configuration options: [Enabled] [Disabled]

Legacy USB Support [Auto]

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]

Be cautious when changing the settings of the PCI PnP menu items. Incorrect field values 

can cause the system to malfunction.

Plug and Play O/S [No]

When set to [No], BIOS configures all the devices in the system. When set to [Yes] and if 

you install a Plug and Play operating system, the operating system configures the Plug and 

Play devices not required for boot. Configuration options: [No] [Yes]

2.4.6 

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.