GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard, vs GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,
Updated August 2026 — GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, leads on power phase and connectivity.
The GIGABYTE Z790 UD AC offers better power design and is more affordable, making it the better choice overall.
Why GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard, is better
Price
Z790 Eagle AX is more expensive
Wireless
Z790 Eagle AX has WIFI6E
Aesthetics
Z790 Eagle AX has RGB Fusion
Why GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, is better
Power Design
Z790 UD AC has 16+1+1 power phase
Thermal Management
Z790 UD AC has ultra-durable armor
Value
Z790 UD AC is cheaper by $10
Overall score
Specifications
| Spec | GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard, | GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, |
|---|---|---|
| Power Phase | 12+1+1 | 16+1+1 |
| M.2 Slots | 3X | 3X |
| USB Type-C | 3.2 Gen 2x2 | 3.2 Gen 2x2 |
| WiFi | WIFI6E | Dual Band |
| Ethernet | 2.5GbE | 2.5GbE |
Dimension comparison
Overview of GIGABYTE Z790 Eagle AX and GIGABYTE Z790 UD AC
The GIGABYTE Z790 Eagle AX and the GIGABYTE Z790 UD AC are both high-performance motherboards supporting Intel Core 14th, 13th, and 12th Gen processors. While they share many similarities, key differences set them apart. The Z790 Eagle AX is priced at $159.99, whereas the Z790 UD AC comes in at $149.99, making it about 6% cheaper than its counterpart.
Power Design Comparison
The Z790 Eagle AX features a 12+1+1 power phase design, while the Z790 UD AC boasts a more robust 16+1+1 power phase setup. This difference means that the UD AC can potentially handle higher power demands and offer improved stability during intense gaming sessions. The Z790 UD AC's use of a 60A DrMOS in its power design also indicates a more advanced power delivery, which can be beneficial for overclocking and maintaining performance under heavy load.
Thermal Management
When it comes to thermal management, both motherboards are designed with comprehensive cooling solutions. The Z790 Eagle AX includes enlarged MOSFET heatsinks and an M.2 Thermal Guard to maintain optimal temperatures during operation. In contrast, the Z790 UD AC features fully covered MOSFET heatsinks and an ultra-durable armor, which may provide superior thermal management. This could lead to better longevity and performance stability over time, particularly for users who push their systems to the limit.
Connectivity Options
Connectivity is another area where these two motherboards excel, but with slight differences. Both support PCIe 5.0 and include three M.2 slots for NVMe SSDs, but the Z790 Eagle AX is designed for PCIe 4.0, while the Z790 UD AC supports triple NVMe PCIe 4.0 x4 M.2. This distinction means the UD AC offers slightly better versatility for storage options. Furthermore, both motherboards feature USB 3.2 Gen 2x2 Type-C, ensuring fast data transfer rates for compatible devices.
Memory Support
Both the Z790 Eagle AX and Z790 UD AC support dual-channel DDR5 memory with four DIMM slots. However, the Z790 UD AC's power design, with its 16+1+1 configuration, suggests it may provide better memory overclocking potential. This could be an important factor for users looking to maximize their system's performance with higher-capacity and higher-speed RAM configurations.
Networking Features
Networking capabilities are vital for gamers and content creators alike. The Z790 Eagle AX includes WIFI6E and 2.5GbE Ethernet, ensuring fast and reliable internet connectivity. The Z790 UD AC offers dual-band WiFi and the same 2.5GbE Ethernet, but lacks the advanced features of WIFI6E. Users focused on cutting-edge wireless technology may prefer the Eagle AX for its superior wireless capabilities, although both provide excellent wired options.
Aesthetic and Build Quality
In terms of aesthetics, both motherboards feature GIGABYTE's RGB Fusion technology, adding customizable lighting options for users who appreciate visual appeal. The Z790 UD AC, however, builds on this with an ultra-durable armor, which not only enhances its appearance but also contributes to overall durability. Both motherboards are built on a six-layer PCB, ensuring a sturdy foundation, but the added features of the UD AC may give it a slight edge in terms of long-term reliability.
Price Comparison
The GIGABYTE Z790 Eagle AX is priced at $159.99, while the Z790 UD AC is available for $149.99. This makes the UD AC about 6% cheaper, providing potential savings for budget-conscious users. Given the similar features and performance capabilities, the price difference could influence a buyer's decision, especially if they are looking for value without sacrificing quality.
Which should you buy?
Choosing between the GIGABYTE Z790 Eagle AX and the GIGABYTE Z790 UD AC ultimately depends on your specific needs and preferences. If you prioritize advanced wireless connectivity and a slightly higher power phase count, the Z790 UD AC may be the better choice, especially considering its lower price. However, if cutting-edge wireless technology is essential for your setup, the Z790 Eagle AX stands out as the superior option. Both motherboards offer excellent performance and features, making them solid choices for gamers and PC builders alike.

