ASROCK A75 Pro4-M User Manual

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3.4.7 USB Configuration
USB 2.0 Controller
Use this item to enable or disable the use of USB 2.0 controller.
USB 3.0 Controller
Use this item to enable or disable the use of USB 3.0 controller.
Legacy USB Support
Use this option to select legacy support for USB devices. There are four
con guration 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.
Legacy USB 3.0 Support
Use this option to enable or disable legacy support for USB 3.0 devices.
The default value is [Enabled].

ASROCK A75 Pro4-M Specifications

General

Form Factor	Micro ATX
Chipset	AMD A75
Socket	FM1
Max Memory	64GB
PCIe Slots	1 x PCIe 2.0 x16, 1 x PCIe 2.0 x1
PCI Slots	2
SATA Ports	6 x SATA3 6.0 Gb/s
Video Outputs	D-Sub, DVI-D, HDMI
Audio	Realtek ALC892 7.1-Channel High Definition Audio Codec
LAN	Realtek RTL8111E Gigabit LAN
Memory Slots	4 x DIMM
Memory Support	DDR3 2400(OC)/1866/1600/1333/1066
eSATA Port	1 x eSATA3
USB Ports	10 x USB 2.0
RAID Support	RAID 0, RAID 1, RAID 10