ASRock H61M-VG3 User Manual - Page 60

USB Configuration - compatibility

Page 60 highlights

CSM Please disable CSM when you enable Fast Boot option. The default value is [Enabled]. 3.4.8 USB Configuration USB 2.0 Controller Use this item to enable or disable the use of USB 2.0 controller. Legacy USB Support Use this option to select legacy support for USB devices. There are four configuration options: [Enabled], [Auto], [Disabled] and [UEFI Setup Only]. The default value is [Enabled]. Please refer to below descriptions for the details of these four options: [Enabled] - Enables support for legacy USB. [Auto] - Enables legacy support if USB devices are connected. [Disabled] - USB devices are not allowed to use under legacy OS and UEFI setup when [Disabled] is selected. If you have USB compatibility issue, it is recommended to select [Disabled] to enter OS. [UEFI Setup Only] - USB devices are allowed to use only under UEFI setup and Windows / Linux OS. 60

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60
3.4.8
USB Configuration
USB 2.0 Controller
Use this item to enable or disable the use of USB 2.0 controller.
Legacy USB Support
Use this option to select legacy support for USB devices. There are four
configuration options: [Enabled], [Auto], [Disabled] and [UEFI Setup Only].
The default value is [Enabled]. Please refer to below descriptions for the
details of these four options:
[Enabled] - Enables support for legacy USB.
[Auto] - Enables legacy support if USB devices are connected.
[Disabled] - USB devices are not allowed to use under legacy OS and
UEFI setup when [Disabled] is selected. If you have USB compatibility is-
sue, it is recommended to select [Disabled] to enter OS.
[UEFI Setup Only] - USB devices are allowed to use only under UEFI
setup and Windows / Linux OS.
CSM
Please disable CSM when you enable Fast Boot option. The default value
is [Enabled].