Z790 UD AC - Motherboard GIGABYTE - Free user manual and instructions
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| Product Type | Motherboard |
| Brand | Gigabyte |
| Model | Z790 UD AC |
| Form Factor | ATX |
| Socket | LGA1700 |
| Chipset | Intel Z790 |
| Memory Support | DDR5, 4 slots, up to 128GB, max 7600MHz (OC) |
| Expansion Slots | 1 x PCIe 5.0 x16, 1 x PCIe 4.0 x16, 2 x PCIe 3.0 x1 |
| Storage | 3 x M.2 (PCIe 4.0), 4 x SATA 6Gb/s |
| Networking | Wi-Fi 6E, Bluetooth 5.3, Realtek 2.5GbE LAN |
| Audio | Realtek ALC897 7.1 Channel HD Audio |
| USB Ports (Rear) | 1 x USB 3.2 Gen 2x2 Type-C, 1 x USB 3.2 Gen 2 Type-A, 4 x USB 3.2 Gen 1 Type-A, 2 x USB 2.0 |
| Internal I/O | 1 x USB 3.2 Gen 1 header, 2 x USB 2.0 headers, 1 x Thunderbolt add-in card header |
| Power Connectors | 24-pin ATX, 8-pin + 4-pin CPU |
| Dimensions | 305mm x 244mm (12 x 9.6 inches) |
| Weight | Approximately 1.2 kg (2.65 lbs) |
| BIOS | 256 Mbit Flash, UEFI AMI, with Q-Flash Plus |
| Operating System Support | Windows 11, Windows 10 64-bit |
| Maintenance | Keep dry and dust-free; clean with soft, dry cloth |
| Safety | Use ESD wrist strap; power off before installation |
| Spare Parts & Repairability | Contact Gigabyte support for replacement; no user-serviceable parts |
| General | Released 2022, supports Intel 12th/13th/14th Gen CPUs |
Frequently Asked Questions - Z790 UD AC GIGABYTE
Does the Gigabyte Z790 UD AC support DDR4 memory?
No, this motherboard supports only DDR5 memory. DDR4 modules are not compatible.
How do I update the BIOS on the Z790 UD AC?
You can update the BIOS using Q-Flash Plus (USB flashback) without a CPU or memory. Download the latest BIOS from Gigabyte's website, rename it to 'gigabyte.bin', place on a FAT32 USB drive, insert into the white USB port, then press the Q-Flash Plus button.
What is the maximum RAM speed supported?
Officially, the motherboard supports DDR5 up to 7600MHz (OC). Actual speeds depend on the CPU and memory kit.
Does the Z790 UD AC have built-in Wi-Fi?
Yes, it includes Wi-Fi 6E (802.11ax) and Bluetooth 5.3 via an onboard module.
How many M.2 slots are available and which generation?
There are three M.2 slots, all supporting PCIe 4.0 x4. The top slot also supports SATA SSDs.
Can I use a 12th Gen Intel CPU on this board?
Yes, the Z790 UD AC is compatible with Intel 12th, 13th, and 14th Gen Core processors (LGA1700). A BIOS update may be required for 14th Gen.
What is the rear I/O layout?
Rear I/O includes: 1 x USB 3.2 Gen 2x2 Type-C, 1 x USB 3.2 Gen 2 Type-A, 4 x USB 3.2 Gen 1 Type-A, 2 x USB 2.0, HDMI 2.0, DisplayPort 1.2, 2.5GbE LAN, Wi-Fi antenna connectors, audio jacks, and optical S/PDIF out.
How do I enable XMP/EXPO for memory?
Enter the BIOS (DEL key at startup), navigate to Tweaker section, find Memory Profile (XMP/EXPO), select the desired profile, save and exit.
Is the board compatible with Windows 10?
Yes, it supports Windows 10 64-bit, but for full feature support (e.g., Wi-Fi 6E), Windows 11 is recommended.
What to do if the motherboard doesn't power on?
Check all power connections (24-pin ATX, CPU 8+4 pin), ensure the PSU switch is on, and try a CMOS reset by shorting the CLR_CMOS pins or removing the battery for 30 seconds.
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USER MANUAL Z790 UD AC GIGABYTE
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Product information
Brand : GIGABYTE
Model : Z790 UD AC
Category : Motherboard