Asus STRIX X99 Manual page 38

4. USB 3.0 connectors (20-1 pin USB3_12, USB3_34)
These connectors allow you to connect a USB 3.0 module for additional USB 3.0 front
or rear panel ports. With an installed USB 3.0 module, you can enjoy all the benefits of
USB 3.0 including faster data transfer speeds of up to 5Gb/s, faster charging time for
USB-chargeable devices, optimized power efficiency, and backward compatibility with
USB 2.0.
The USB 3.0 module is purchased separately.
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Ensure to install the related driver to fully use the USB 3.0 ports under Windows
The plugged USB 3.0 device may run on xHCI or EHCI mode depending on the
operating system's setting.
These USB 3.0 ports support native UASP transfer standard in Windows
Windows 8.1 and Turbo Mode when using USB 3.0 Boost feature.
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Chapter 1: Product Introduction
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