GIGABYTE Z690 AORUS ELITE AX DDR5 LGA 1700 ATX Motherboard - Manual (Page 20)

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Above 4G Decoding
Enables or disables 64-bit capable devices to be decoded in above 4 GB address space (only if your system
supports 64-bit PCI decoding). Set to Enabled if more than one advanced graphics card are installed and
their drivers are not able to be launched when entering the operating system (because of the limited 4 GB
memory address space).
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IOAPIC 24-119 Entries
Enables or disables this function.
` Thunderbolt(TM) Configuration (Note)
This sub-menu provides Intel ® Thunderbolt ™ related configuration options.
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PCIE Tunneling over USB4
Enables or disables PCIE Tunneling over USB4.
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Discrete Thunderbolt(TM) Support
Enables or disables the Intel ® Thunderbolt ™ Technology.
& Wake up from Thunderbolt(TM) Devices
Enabled allows the system to wake up from Thunderbolt ™ devices.
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Discrete Thunderbolt(TM) Configuration
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Thunderbolt(TM) Boot Support
Enabled allows for booting from bootable devices connected through Thunderbolt ™ .
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GPIO filter
GPIO filter is needed to avoid electrical noise on PCH GPIOs during hotplug of 12V USB devices.
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DTBT Go2Sx Command
Enables or disables the Go2sx command to put DTBT into Sx state while system is going into Sx.
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DTBT Controller 0 Configuration
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DTBT Controller 0
Enables or disables DTBT Controller 0.
& Extra Bus Reserved
This item allows you to set the number of the bus reserved for Thunderbolt ™ ports.
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Reserved Memory
Allows you to set the reserved memory for this root bridge.
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Memory Alignment
Allows you to set memory alignment.
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Reserved PMemory
Allows you to set the reserved prefetchable memory for this root bridge.
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PMemory Alignment
Allows you to set prefetchable memory alignment.
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Reserved I/O
Allows you to set reserved I/O for DTBT Controller 0.
(Note) This sub-menu appears only on motherboards that have an onboard Intel ® Thunderbolt ™ controller or
motherboards that have a GIGABYTE Thunderbolt ™ add-in card installed.