The Gigabyte Z890 UD is built around the LGA 1851 CPU socket and is compatible with the Z890 chipset, housed in a standard ATX form factor measuring 305 mm × 244 mm. It supports a single CPU socket configuration and does not include an integrated CPU or integrated graphics. The board is designed with overclocking in mind and features RGB lighting, while lacking built-in Wi-Fi and Bluetooth connectivity. It does not offer a dual BIOS setup or a simplified CMOS reset mechanism. A 3-year warranty is included with the board.
The board supports DDR5 memory across four slots in a dual-channel configuration, with a maximum capacity of 256 GB. Standard RAM speeds top out at 6400 MHz, while overclocked profiles can reach up to 8800 MHz. ECC memory is not supported on this board.
The rear I/O panel offers a solid range of connectivity, including one USB 4 40Gbps port, one Thunderbolt 4 port, one USB 3.2 Gen 2 Type-A port, four USB 3.2 Gen 1 Type-A ports, and four USB 2.0 ports. A USB Type-C port is present, though there are no USB 3.2 Gen 2 or Gen 1 Type-C ports, and no USB 3.2 Gen 2x2 or USB 4 20Gbps ports. For display output, there is one DisplayPort, while HDMI, DVI, and VGA outputs are absent. Networking is handled by a single RJ45 port, and legacy input device support is provided through one PS/2 port. There are no eSATA or Thunderbolt 3 ports on this board.
Internal connectivity is well-provisioned, with four M.2 sockets and four SATA 3 connectors for storage, while SATA 2 and U.2 sockets are not present, nor is an mSATA connector. Expansion headers include two USB 3.2 Gen 1 ports, two USB 3.0 ports, and four USB 2.0 ports, all accessible through internal connectors. Thermal management is supported by six fan headers, and a TPM connector is also included on the board.
The board provides three full-length PCIe slots in total: one PCIe 5.0 x16 slot and two PCIe 4.0 x16 slots. There are no PCIe 3.0, 2.0, x8, x4, or x1 slots, and no legacy PCI slots are present.
The board supports 7.1-channel audio and provides three analog audio connectors. An S/PDIF Out port is not included.
The board supports four RAID configurations: RAID 0, RAID 1, RAID 5, and RAID 10 (1+0). RAID 0+1 is not supported.