Asus MAXIMUS IV EXTREME-Z User Manual - Page 116
Legacy USB3.0 Support [Enabled], EHCI Hand-off [Disabled], USB 2.0 Switch [PCH]
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Legacy USB3.0 Support [Enabled] [Enabled] Enables the support for USB 3.0 devices on legacy operating systems (OS). [Disabled] Disables the function. EHCI Hand-off [Disabled] [Enabled] Enables the support for operating systems without an EHCI hand‑off feature. [Disabled] Disables the function. USB 2.0 Switch [PCH] Allows you to select from PCH to NEC for USB 2.0 ports. Configuration options: [PCH] [NEC] 3-24 Chapter 3: BIOS setup
3-24
Chapter 3: BIOS setup
Legacy USB3.0 Support [Enabled]
[Enabled]
Enables the support for USB 3.0 devices on legacy operating
systems (OS).
[Disabled]
Disables the function.
EHCI Hand-off [Disabled]
[Enabled]
Enables the support for operating systems without an EHCI
hand-off feature.
[Disabled]
Disables the function.
USB 2.0 Switch [PCH]
Allows you to select from PCH to NEC for USB 2.0 ports.
Configuration options: [PCH] [NEC]