Asus SABERTOOTH X99 User Guide - Page 114
xHCI Hand-off [Disabled], USB Single Port Control, Disables the EHCI Hand-off support.
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Page 114 highlights
xHCI Hand-off [Disabled] [Enabled] Enables the support for operating systems without an xHCI hand‑off feature. [Disabled] Disables the xHCI Hand-off support. EHCI Hand-off [Disabled] [Enabled] Enables the support for operating systems without an EHCI hand‑off feature. [Disabled] Disables the EHCI Hand-off support. USB Single Port Control This item allows you to enable or disable the individual USB ports. Refer to section 1.2.2 Motherboard layout for the location of the USB ports. Chapter 3 3-44 Chapter 3: BIOS setup
3-44
Chapter 3: BIOS setup
Chapter 3
xHCI Hand-off [Disabled]
[Enabled]
Enables the support for operating systems without an xHCI hand-off
feature.
[Disabled]
Disables the xHCI Hand-off support.
EHCI Hand-off [Disabled]
[Enabled]
Enables the support for operating systems without an EHCI hand-off
feature.
[Disabled]
Disables the EHCI Hand-off support.
USB Single Port Control
This item allows you to enable or disable the individual USB ports.
Refer to section
1.2.2 Motherboard layout
for the location of the USB ports.