A75MH / A55MH UEFI BIOS Manual
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Fan Ctrl Start Value
This item sets CPU FAN Start Speed Value.
Options: 50 (Default)
Fan Ctrl Sensitive
The bigger the numeral is, the higher the FAN speed is.
Options: 30 (Default)
USB Configuration
Legacy USB Support
This item determines if the BIOS should provide legacy support for USB devices
like the keyboard, mouse, and USB drive. This is a useful feature when using such
USB devices with operating systems that do not natively support USB (e.g.
Microsoft DOS or Windows NT).
Options: Enabled (Default) / Disabled / Auto
USB3.0 Support (Only for A75MH)
The item allows you to enable or disable USB3.0 (XHCI) Controller support.
Options: Enabled (Default) / Disabled
XHCI Hand-Off (Only for A75MH)
This is a workaround for OSes without XHCI hand-off support. The XHCI
ownership change should be claimed by XHCI driver.
Options: Disabled (Default) / Enabled
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