Gigabyte Z790 UD AX User manual

Z790 UD AX
Z790 UD AC
Z790 UD
Z790 D DDR4
User's Manual
Rev. 1201
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Also, to reduce the impacts on global warming, the packaging materials of this product
are recyclable and reusable. GIGABYTE works with you to protect the environment.
For more product details, please visit GIGABYTE's website.

Copyright
© 2023 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.
The trademarks mentioned in this manual are legally registered to their respective owners.
Disclaimer
Information in this manual is protected by copyright laws and is the property of GIGABYTE.
Changes to the specications and features in this manual may be made by GIGABYTE without
prior notice. No part of this manual may be reproduced, copied, translated, transmitted, or
published in any form or by any means without GIGABYTE's prior written permission.
For detailed product information, carefully read the User's Manual.
For quick set-up of the product, refer to the Quick Installation Guide on GIGABYTE's
website.
https://download.gigabyte.com/FileList/Manual/mb_manual_quick-guide_am5.pdf?m=sw
For product-related information, check on our website at: https://www.gigabyte.com
Identifying Your Motherboard Revision
The revision number on your motherboard looks like this: "REV: X.X." For example, "REV: 1.0"
means the revision of the motherboard is 1.0. Check your motherboard revision before
updating motherboard BIOS, drivers, or when looking for technical information.
Example:

- 3 -
Table of Contents
Chapter 1 Product Introduction.......................................................................................4
1-1 Motherboard Layout......................................................................................... 4
Chapter 2 Hardware Installation .....................................................................................6
2-1 Installation Precautions.................................................................................... 6
2-2 Product Specications...................................................................................... 7
2-3 Installing the CPU and CPU Cooler ............................................................... 11
2-4 Installing the Memory..................................................................................... 14
2-5 Installing an Expansion Card ......................................................................... 15
2-6 Back Panel Connectors.................................................................................. 16
2-7 Onboard Buttons and LEDs ........................................................................... 18
2-8 Internal Connectors........................................................................................ 20
Chapter 3 BIOS Setup ..................................................................................................33
Chapter 4 Installing the Operating System and Drivers................................................35
4-1 Operating System Installation ........................................................................ 35
4-2 Drivers Installation.......................................................................................... 36
Chapter 5 Appendix ......................................................................................................37
5-1 Conguring a RAID Set.................................................................................. 37
Regulatory Notices.................................................................................................... 38
Contact Us ................................................................................................................ 42

- 4 -
1-1 Motherboard Layout
Chapter 1 Product Introduction
M2_WIFIjk
DP_HDMI
U320G
U32G2
U32_LAN
LGA1700
ATX
AUDIO
DDR5_A1 DDR5_A2 DDR5_B1 DDR5_B2
BAT
Intel®Z790
CLR_CMOS
M_BIOS
THB_C1
THB_C2
CODEC
PCIEX16
PCIEX1_2
PCIEX4
F_U32C F_U32
KB_MS_USB20
Z790 UD AX/ Z790 UD AC
Z790 UD
F_USB2
SPDIF_O
F_AUDIO
F_USB1
LED_C1
SPI_TPM F_PANEL
CPU_FAN
CPU_OPT
SYS_FAN3_PUMP
iTE®
Super I/O
D_LED2
LED_C2
ATX_12V_2X4_2
ATX_12V_2X4_1
USB 2.0
Hub
USB 2.0 Hub
SATA3 357
246
U32_20
Temperature sensor
Realtek®
2.5GbE LAN
RST_SW
RST
QFLED
QFLASH_PLUS
jOnly for Z790 UD AX.
kOnly for Z790 UD AC.
VGA CPU
BOOT DRAM
80
80
M2A_CPU
110
M2P_SB
80
M2Q_SB
PCIEX1_3
PCIEX1_4
COM
D_LED1
SYS_FAN1
SYS_FAN2A
SYS_FAN2B
PCIEX1_1k

- 5 -
HDMI
U320G
U32G2
U32_LAN
LGA1700
ATX
AUDIO
DDR4_A1 DDR4_A2 DDR4_B1 DDR4_B2
BAT
Intel®Z790
CLR_CMOS
M_BIOS
THB_C1
THB_C2
CODEC
PCIEX16
PCIEX1_2
PCIEX4
F_U32C F_U32
KB_MS_USB20
Z790 D DDR4
F_USB2
SPDIF_O
F_AUDIO
F_USB1
LED_C1
SPI_TPM F_PANEL
CPU_FAN
CPU_OPT
SYS_FAN3_PUMP
iTE®
Super I/O
D_LED2
LED_C2
ATX_12V_2X4
ATX_12V_2X2
USB 2.0
Hub
SATA3 357
246
U32
Temperature sensor
Realtek®
2.5GbE LAN
RST_SW
RST
QFLED
QFLASH_PLUS
VGA CPU
BOOT DRAM
80
80
M2A_CPU
110
M2P_SB
80
M2Q_SB
PCIEX1_3
PCIEX1_4
COM
D_LED1
SYS_FAN1
SYS_FAN2A
SYS_FAN2B

- 6 -
2-1 Installation Precautions
The motherboard contains numerous delicate electronic circuits and components which can become
damaged as a result of electrostatic discharge (ESD). Prior to installation, carefully read the user's
manual and follow these procedures:
•Prior to installation, make sure the chassis is suitable for the motherboard.
•Prior to installation, do not remove or break motherboard S/N (Serial Number) sticker or
warranty sticker provided by your dealer. These stickers are required for warranty validation.
•Always remove the AC power by unplugging the power cord from the power outlet before
installing or removing the motherboard or other hardware components.
•When connecting hardware components to the internal connectors on the motherboard, make
sure they are connected tightly and securely.
•When handling the motherboard, avoid touching any metal leads or connectors.
•It is best to wear an electrostatic discharge (ESD) wrist strap when handling electronic
components such as a motherboard, CPU or memory. If you do not have an ESD wrist strap,
keep your hands dry and rst touch a metal object to eliminate static electricity.
•Prior to installing the motherboard, please have it on top of an antistatic pad or within an
electrostatic shielding container.
•Before connecting or unplugging the power supply cable from the motherboard, make sure
the power supply has been turned off.
•Before turning on the power, make sure the power supply voltage has been set according to
the local voltage standard.
•Before using the product, please verify that all cables and power connectors of your hardware
components are connected.
•To prevent damage to the motherboard, do not allow screws to come in contact with the
motherboard circuit or its components.
•Make sure there are no leftover screws or metal components placed on the motherboard or
within the computer casing.
•Do not place the computer system on an uneven surface.
•Do not place the computer system in a high-temperature or wet environment.
•Turning on the computer power during the installation process can lead to damage to system
components as well as physical harm to the user.
•If you are uncertain about any installation steps or have a problem related to the use of the
product, please consult a certied computer technician.
•If you use an adapter, extension power cable, or power strip, ensure to consult with its installation
and/or grounding instructions.
Chapter 2 Hardware Installation

- 7 -
2-2 ProductSpecications
CPU LGA1700 socket: Support for the 13th and 12th Generation Intel®Core™, Pentium®
Gold and Celeron® Processors
(Go to GIGABYTE's website for the latest CPU support list.)
L3 cache varies with CPU
Chipset Intel® Z790 Express Chipset
Memory 13th Generation Intel®Core™ i9/i7 Processors:
- Support for DDR5 5600/5200/4800/4400 MT/s memory modules jkl
 13th Generation Intel®Core™ i5/i3 and 12th Generation Intel®Core™, Pentium®
Gold and Celeron® Processors:
- Support for DDR5 4800/4400 MT/s memory modules jkl
Support for DDR4 3200/3000/2933/2666/2400/2133 MHz memory modulesm
 4 x DDR5 DIMM sockets supporting up to 192 GB (48 GB single DIMM capacity)
of system memoryjkl
 4 x DDR4 DIMM sockets supporting up to 128 GB (32 GB single DIMM capacity)
of system memorym
Dual channel memory architecture
 Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules (operate in
non-ECC mode)
Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
Support for Extreme Memory Prole (XMP) memory modules
(The CPU and memory conguration may affect the supported memory types, data
rate (speed), and number of DRAM modules, please refer to "Memory Support
List" on GIGABYTE's website for more information.)
Onboard
Graphics
Integrated Graphics Processor-Intel® HD Graphics support:
- 1 x HDMI port, supporting a maximum resolution of 4096x2160@60 Hz
* Support for HDMI 2.0 version and HDCP 2.3.
- 1 x DisplayPort, supporting a maximum resolution of 4096x2304@60 Hzjkl
* Support for DisplayPort 1.2 version and HDCP 2.3
(Graphics specications may vary depending on CPU support.)
Audio Realtek®Audio CODEC
High Denition Audio
2/4/5.1/7.1-channel
* You can change the functionality of an audio jack using the audio software. To congure
7.1-channel audio, access the audio software for audio settings.
Support for S/PDIF Out
LAN Realtek® 2.5GbE LAN chip (2.5 Gbps/1 Gbps/100 Mbps)
Wireless
Communication
Modulej
Intel® Wi-Fi 6E AX210 (For PCB rev. 1.0)
- WIFI a, b, g, n, ac, ax, supporting 2.4/5/6 GHz carrier frequency bands
- BLUETOOTH 5.3
- Support for 11ax 160MHz wireless standard and up to 2.4 Gbps data rate
Intel® Wi-Fi 6E AX211 (For PCB rev. 1.1)
- WIFI a, b, g, n, ac, ax, supporting 2.4/5/6 GHz carrier frequency bands
- BLUETOOTH 5.3
- Support for 11ax 160MHz wireless standard and up to 2.4 Gbps data rate
(Actual data rate may vary depending on environment and equipment.)
jOnly for Z790 UD AX. lOnly for Z790 UD.
kOnly for Z790 UD AC. mOnly for Z790 D DDR4.

- 8 -
Wireless
Communication
Modulej
Realtek® Wi-Fi 6E RTL8852CE (For PCB rev. 1.2)
- WIFI a, b, g, n, ac, ax, supporting 2.4/5/6 GHz carrier frequency bands
- BLUETOOTH 5.3
- Support for 11ax 160MHz wireless standard and up to 2.4 Gbps data rate
(Actual data rate may vary depending on environment and equipment.)
Wireless
Communication
Modulek
Realtek® Wi-Fi RTL8821CE
- WIFI 802.11a, b, g, n, ac, supporting 2.4/5 GHz Dual-Band
- BLUETOOTH 4.2
- Support for 11ac wireless standard and up to 433 Mbps data rate
(Actual data rate may vary depending on environment and equipment.)
Expansion Slots
jlm
CPU:
- 1 x PCI Express x16 slot, supporting PCIe 5.0 and running at x16 (PCIEX16)
* For optimum performance, if only one PCI Express graphics card is to be installed,
be sure to install it in the PCIEX16 slot.
Chipset:
- 1 x PCI Express x16 slot, supporting PCIe 4.0 and running at x4 (PCIEX4)
- 1 x PCI Express x16 slot, supporting PCIe 3.0 and running at x1 (PCIEX1_4)
- 2 x PCI Express x1 slots, supporting PCIe 3.0 and running at x1 (PCIEX1_2,
PCIEX1_3)
Expansion Slots
k
CPU:
- 1 x PCI Express x16 slot, supporting PCIe 5.0 and running at x16 (PCIEX16)
* For optimum performance, if only one PCI Express graphics card is to be installed,
be sure to install it in the PCIEX16 slot.
Chipset:
- 1 x PCI Express x16 slot, supporting PCIe 4.0 and running at x4 (PCIEX4)
- 2 x PCI Express x16 slots, supporting PCIe 3.0 and running at x1 (PCIEX1_1,
PCIEX1_4)
- 2 x PCI Express x1 slots, supporting PCIe 3.0 and running at x1 (PCIEX1_2,
PCIEX1_3)
Storage Interface CPU:
- 1 x M.2 connector (Socket 3, M key, type 22110/2280 PCIe 4.0 x4/x2 SSD
support) (M2A_CPU)
Chipset:
- 2 x M.2 connectors (Socket 3, M key, type 2280 PCIe 4.0 x4/x2 SSD support)
(M2Q_SB, M2P_SB)
- 6 x SATA 6Gb/s connectors
RAID 0, RAID 1, RAID 5, and RAID 10 support for NVMe SSD storage devices
RAID 0, RAID 1, RAID 5, and RAID 10 support for SATA storage devices
jOnly for Z790 UD AX. lOnly for Z790 UD.
kOnly for Z790 UD AC. mOnly for Z790 D DDR4.

- 9 -
USB Chipset:
- 1 x USB Type-C® port on the back panel, with USB 3.2 Gen 2x2 support
- 1 x USB Type-C® port with USB 3.2 Gen 1 support, available through the
internal USB header
- 1 x USB 3.2 Gen 2 Type-A port (red) on the back panel
- 6 x USB 3.2 Gen 1 ports (4 ports on the back panel, 2 ports available through
the internal USB header)
USB Chipset+2 USB 2.0 Hubs:jkl
- 8 x USB 2.0/1.1 ports (4 ports on the back panel, 4 ports available through
the internal USB headers)
Chipset+1 USB 2.0 Hub:m
- 6 x USB 2.0/1.1 ports (2 ports on the back panel, 4 ports available through
the internal USB headers)
Internal
Connectors
1 x 24-pin ATX main power connector
2 x 8-pin ATX 12V power connectorsjkl
1 x 8-pin ATX 12V power connectorm
1 x 4-pin ATX 12V power connectorm
1 x CPU fan header
1 x CPU fan/water cooling pump header
3 x system fan headers
1 x system fan/water cooling pump header
2 x addressable LED strip headers
2 x RGB LED strip headers
3 x M.2 Socket 3 connectors
6 x SATA 6Gb/s connectors
1 x front panel header
1 x front panel audio header
1 x S/PDIF Out header
1 x USB Type-C® header, with USB 3.2 Gen 1 support
1 x USB 3.2 Gen 1 header
2 x USB 2.0/1.1 headers
1 x serial port header
2 x Thunderbolt™add-in card connectors
 1 x Trusted Platform Module header (For the GC-TPM2.0 SPI/GC-TPM2.0 SPI
2.0 module only)
1 x reset button
1 x Q-Flash Plus button
1 x reset jumper
1 x Clear CMOS jumper
jOnly for Z790 UD AX. lOnly for Z790 UD.
kOnly for Z790 UD AC. mOnly for Z790 D DDR4.

- 10 -
Back Panel
Connectors
1 x USB Type-C® port, with USB 3.2 Gen 2x2 support
1 x USB 3.2 Gen 2 Type-A port (red)
4 x USB 3.2 Gen 1 ports
4 x USB 2.0/1.1 portsjkl
2 x USB 2.0/1.1 portsm
2 x SMA antenna connectors (2T2R)j(1T1R)k
1 x HDMI port
1 x DisplayPortjkl
1 x RJ-45 port
3 x audio jacks
I/O Controller iTE® I/O Controller Chip
Hardware
Monitor
Voltage detection
Temperature detection
Fan speed detection
Water cooling ow rate detection
Fan fail warning
Fan speed control
* Whether the fan (pump) speed control function is supported will depend
on the fan (pump) you install.
BIOS 1 x 256 Mbit ash
Use of licensed AMI UEFI BIOS
PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
Unique Features Support for GIGABYTE Control Center (GCC)
* Available applications in GCC may vary by motherboard model. Supported functions
of each application may also vary depending on motherboard specications.
Support for Q-Flash
Support for Q-Flash Plus
Support for Smart Backup
Bundled
Software
Norton® Internet Security (OEM version)
LAN bandwidth management software
Operating
System
Support for Windows 11 64-bit
Support for Windows 10 64-bit
Form Factor ATX Form Factor; 30.5cm x 24.4cm
* GIGABYTE reserves the right to make any changes to the product specications and product-related information without
prior notice.
&Please visit the SERVICE/SUPPORT\Utility page on GIGABYTE's website to download the latest version
of apps.
https://www.gigabyte.com/Support/Utility/Motherboard?m=ut

- 11 -
2-3 Installing the CPU and CPU Cooler
Read the following guidelines before you begin to install the CPU:
•Make sure that the motherboard supports the CPU.
(Go to GIGABYTE's website for the latest CPU support list.)
•Always turn off the computer and unplug the power cord from the power outlet before installing the
CPU to prevent hardware damage.
•Locate the pin one of the CPU. The CPU cannot be inserted if oriented incorrectly. (Or you may
locate the notches on both sides of the CPU and alignment keys on the CPU socket.)
•Apply an even and thin layer of thermal grease on the surface of the CPU.
•Do not turn on the computer if the CPU cooler is not installed, otherwise overheating and damage
of the CPU may occur.
•Set the CPU host frequency in accordance with the CPU specications. It is not recommended
that the system bus frequency be set beyond hardware specications since it does not meet the
standard requirements for the peripherals. If you wish to set the frequency beyond the standard
specications, please do so according to your hardware specications including the CPU, graphics
card, memory, hard drive, etc.
A. Note the CPU Orientation
Note the alignment keys on the motherboard CPU socket and the notches on the CPU.
Alignment Key
Alignment Key
LGA1700 CPU Socket
Triangle Pin One
Marking of the
CPU Socket
Notch
Notch
LGA1700 CPU
Triangle Pin One
Marking on the
CPU
&Please visit GIGABYTE's website for details on hardware installation.
http://www.gigabyte.com/WebPage/210/quick-guide.html?m=sw
Do not remove the CPU socket cover before inserting the CPU. It may pop off from the load
plate automatically after you insert the CPU and close the load plate.

- 12 -
Do not force to engage the CPU socket locking lever when the CPU is not installed correctly
as this would damage the CPU and CPU socket.
B. Installing the CPU
Follow the steps below to correctly install the CPU into the motherboard CPU socket.
w
u
v
jGently press the CPU socket lever handle
down and away from the socket.
kCompletely lift up the CPU socket lock-
ing lever.
lUse the finger tab on the side of the
metal load plate to lift open the metal
load plate with the plastic protective cover
attached to it.
Hold the CPU with your ngers by the edges.
Align the CPU pin one marking (triangle) with
the pin one corner of the CPU socket (or you
may align the CPU notches with the socket
alignment keys) and gently insert the CPU
into position.
Make sure the CPU is properly installed and
then close the load plate. The plastic protec-
tive cover will pop off, just remove it. Secure
the lever under its retention tab to complete
the installation of the CPU.
* Always replace the plastic protective cover
when the CPU is not installed to protect the
CPU socket.
j
k
l
Finger Tab
Pin One
j
k
l

- 13 -
C. Installing the CPU Cooler
Be sure to install the CPU cooler after installing the CPU. (Actual installation process may differ depending the
CPU cooler to be used. Refer to the user's manual for your CPU cooler.)
u
v
Apply an even and thin layer of thermal
grease on the surface of the installed CPU.
Place the cooler atop the CPU, aligning the
four push pins through the pin holes on the
motherboard. Push down on the push pins
diagonally.
j
j
k
k
w
Finally, attach the power connector of
the CPU cooler to the CPU fan header
(CPU_FAN) on the motherboard.
CPU_FAN

- 14 -
2-4 Installing the Memory
Read the following guidelines before you begin to install the memory:
•Make sure that the motherboard supports the memory. It is recommended that memory of the same
capacity, brand, speed, and chips be used. (Go to GIGABYTE's website for the latest supported
memory speeds and memory modules.)
•Always turn off the computer and unplug the power cord from the power outlet before installing the
memory to prevent hardware damage.
•Memory modules have a foolproof design. A memory module can be installed in only one direction.
If you are unable to insert the memory, switch the direction.
DualChannelMemoryConguration
This motherboard provides four memory sockets and supports Dual Channel Technology. After the memory
is installed, the BIOS will automatically detect the specications and capacity of the memory. Enabling Dual
Channel memory mode will double the original memory bandwidth.
The four memory sockets are divided into two channels and each channel has two memory sockets as following:
Channel A: DDR5_A1jkl/DDR4_A1m, DDR5_A2jkl/DDR4_A2m
Channel A: DDR5_B1jkl/DDR4_B1m, DDR5_B2jkl/DDR4_B2m
* Recommended Dual Channel Memory Conguration:
DDR5_A1jkl
DDR4_A1m
DDR5_A2jkl
DDR4_A2m
DDR5_B1jkl
DDR4_B1m
DDR5_B2jkl
DDR4_B2m
Two Modules - - DS/SS - - DS/SS
4 Modules DS/SS DS/SS DS/SS DS/SS
(SS=Single-Sided, DS=Double-Sided, "- -"=No Memory)
Due to CPU limitations, read the following guidelines before installing the memory in Dual Channel mode.
1. Dual Channel mode cannot be enabled if only one memory module is installed.
2. When enabling Dual Channel mode with two or four memory modules, it is recommended that memory of
the same capacity, brand, speed, and chips be used.
When installing a single memory module, we recommend that you install it in the
DDR5_A2jkl/DDR4_A2msocket.
DDR5_A1jkl/DDR4_A1m
DDR5_A2jkl/DDR4_A2m
DDR5_B1jkl/DDR4_B1m
DDR5_B2jkl/DDR4_B2m
jOnly for Z790 UD AX. lOnly for Z790 UD.
kOnly for Z790 UD AC. mOnly for Z790 D DDR4.

- 15 -
2-5 Installing an Expansion Card
Read the following guidelines before you begin to install an expansion card:
•Make sure the motherboard supports the expansion card. Carefully read the manual that came
with your expansion card.
•Always turn off the computer and unplug the power cord from the power outlet before installing an
expansion card to prevent hardware damage.
Follow the steps below to correctly install your expansion card in the expansion slot.
1. Locate an expansion slot that supports your card. Remove the metal slot cover from the chassis back panel.
2. Align the card with the slot, and press down on the card until it is fully seated in the slot.
3. Make sure that the expansion card is fully seated in its slot.
4. Secure the card's metal bracket to the chassis back panel with a screw.
5. After installing all expansion cards, replace the chassis cover(s).
6. Turn on your computer. If necessary, go to BIOS Setup to make any required BIOS changes for your
expansion card(s).
7. Install the driver provided with the expansion card in your operating system.
PCIEX16 Slot

- 16 -
2-6 Back Panel Connectors
USB 2.0/1.1 Port (Q-Flash Plus Port)
The USB port supports the USB 2.0/1.1 specication. Use this port for USB devices. Before using Q-Flash
Plus (Note), make sure to insert the USB ash drive into this port rst.
USB 2.0/1.1 Port
The USB port supports the USB 2.0/1.1 specication. Use this port for USB devices.
PS/2 Keyboard/Mouse Port
Use this port to connect a PS/2 mouse or keyboard.
SMA Antenna Connectors (2T2R)j(1T1R)k
Use this connector to connect an antenna.
USB 2.0/1.1 Portjkl
The USB port supports the USB 2.0/1.1 specication. Use this port for USB devices.
USB 3.2 Gen 1 Port
The USB 3.2 Gen 1 port supports the USB 3.2 Gen 1 specication and is compatible to the USB 2.0
specication. Use this port for USB devices.
DisplayPortjkl
DisplayPort delivers high quality digital imaging and audio, supporting bi-directional audio transmission.
DisplayPort can support HDCP 2.3 content protection mechanisms. You can use this port to connect your
DisplayPort-supported monitor. Note: The DisplayPort Technology can support a maximum resolution of
4096x2304@60 Hz but the actual resolutions supported depend on the monitor being used.
HDMI Port
The HDMI port is HDCP 2.3 compliant and supports Dolby TrueHD and DTS
HD Master Audio formats. It also supports up to 192KHz/24bit 7.1-channel
LPCM audio output. You can use this port to connect your HDMI-supported monitor. The maximum
supported resolution is 4096x2160@60 Hz, but the actual resolutions supported are dependent on the
monitor being used.
Tighten the antennas to the antenna connectors and then aim the antennas correctly for better
signal reception.
After installing the DisplayPort/HDMI device, make sure to set the default sound playback device
to DisplayPort/HDMI. (The item name may differ depending on your operating system.)
(Note) To enable the Q-Flash Plus function, please navigate to the "Unique Features" page of GIGABYTE's
website for more information.
jOnly for Z790 UD AX.
kOnly for Z790 UD AC.
lOnly for Z790 UD.

- 17 -
Activity LED
Speed LED
LAN Port
Speed LED:
State Description
Orange 2.5Gbps data rate
Green 1 Gbps data rate
Off 100 Mbps data rate
Activity LED:
State Description
Blinking Data transmission or receiving is occurring
Off No data transmission or receiving is occurring
Line In/Rear Speaker Out
The line in jack. Use this audio jack for line in devices such as an optical drive, walkman, etc.
Line Out/Front Speaker Out
The line out jack.
Mic In/Center/Subwoofer Speaker Out
The Mic in jack.
•When removing the cable connected to a back panel connector, rst remove the cable from
your device and then remove it from the motherboard.
•When removing the cable, pull it straight out from the connector. Do not rock it side to side
to prevent an electrical short inside the cable connector.
Audio Jack Congurations:
Jack Headphone/
2-channel 4-channel 5.1-channel 7.1-channel
Line In/Rear Speaker Out a a a
Line Out/Front Speaker Out a a a a
Mic In/Center/Subwoofer Speaker Out a a
Front Panel Line Out/Side Speaker Out a
You can change the functionality of an audio jack using the audio software. To congure
7.1-channel audio, access the audio software for audio settings.
&Please visit GIGABYTE's website for details on conguring the audio software.
https://www.gigabyte.com/WebPage/697/realtek897-audio.html
USB 3.2 Gen 2 Type-A Port (Red)
The USB 3.2 Gen 2 port supports the USB 3.2 Gen 2 specication and is compatible to the USB 3.2 Gen 1
and USB 2.0 specication. Use this port for USB devices.
USB Type-C®Port (with USB 3.2 Gen 2x2 Support)
The reversible USB port supports the USB 3.2 Gen 2x2 specication and is compatible to the USB 3.2
Gen 2, USB 3.2 Gen 1, and USB 2.0 specications. Use this port for USB devices.
RJ-45 LAN Port
The Gigabit Ethernet LAN port provides Internet connection at up to 2.5 Gbps data rate. The following
describes the states of the LAN port LEDs.

- 18 -
2-7 Onboard Buttons and LEDs
QFLASH_PLUS (Q-Flash Plus Button)
Q-Flash Plus allows you to update the BIOS when your system is off (S5 shutdown state). Save the latest
BIOS on a USB thumb drive and plug it into the dedicated port, and then you can now ash the BIOS
automatically by simply pressing the Q-Flash Plus button. The QFLED will ash when the BIOS matching and
ashing activities start and will stop ashing when the main BIOS ashing is complete.
To enable the Q-Flash Plus function, please navigate to the "Unique Features" page of GIGABYTE's
website for more information.
QFLASH_PLUS
QFLED
Quick Buttons
The reset button (RST_SW) allows users to quickly turn on/off the computer in an open-case environment when
they want to change hardware components or conduct hardware testing.
The reset button provides you with several functions to use. To remap the button to perform different
tasks, please navigate to the "BIOS Setup" page of GIGABYTE's website and search for "RST_SW
(MULTIKEY)" for more information.
RST_SW

- 19 -
Status LEDs
The status LEDs show whether the CPU, memory, graphics card, and operating system are working properly
after system power-on. If the CPU/DRAM/VGA LED is on, that means the corresponding device is not working
normally; if the BOOT LED is on, that means you haven't entered the operating system yet.
CPU: CPU status LED
DRAM: Memory status LED
VGA: Graphics card status LED
BOOT: Operating system status LED
CPU DRAM
VGA BOOT

- 20 -
2-8 Internal Connectors
1) ATX_12V_2X4_1/2jkl,
ATX_12V_2X2m/ATX_12V_2X4m
2) ATX
3) CPU_FAN
4) SYS_FAN1/2A/2B
5) SYS_FAN3_PUMP
6) CPU_OPT
7) LED_C1/LED_C2
8) D_LED1/D_LED2
9) SATA3 2/3/4/5/6/7
10) M2A_CPU/M2P_SB/M2Q_SB
11) F_PANEL
12) F_AUDIO
13) SPDIF_O
14) F_U32C
15) F_U32
16) F_USB1/F_USB2
17) COM
18) SPI_TPM
19) THB_C1/THB_C2
20) CLR_CMOS
21) BAT
22) RST
Read the following guidelines before connecting external devices:
•First make sure your devices are compliant with the connectors you wish to connect.
•Before installing the devices, be sure to turn off the devices and your computer. Unplug the power
cord from the power outlet to prevent damage to the devices.
•After installing the device and before turning on the computer, make sure the device cable has
been securely attached to the connector on the motherboard.
11
4
87
3
2
7
6 8
1
4
14
10
10
10 9
19
15
12 13 17 18 16 5 22 20
21
jOnly for Z790 UD AX. lOnly for Z790 UD.
kOnly for Z790 UD AC. mOnly for Z790 D DDR4.