GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX vs GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,
Updated August 2026 — GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, leads on connectivity and thermals.
The GIGABYTE Z790 UD AC offers superior features and performance for Intel users, making it the better choice overall.
Why GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX is better
Price
B850M is slightly cheaper.
AMD Support
Better for AMD Ryzen builds.
Warranty
Both have the same 5-year warranty.
Why GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, is better
Power Phases
Z790 has 16+1+1 power phase design.
Connectivity
Z790 offers three M.2 slots.
Thermal Management
Z790 includes M.2 thermal guard.
Overall score
Specifications
| Spec | GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX | GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, |
|---|---|---|
| Socket | AM5 | LGA 1700 |
| M.2 Slots | 2 | 3 |
| Power Phases | 10+2+2 | 16+1+1 |
| USB Type | USB-C | USB 3.2 Gen 2x2 |
| DDR5 Support | Yes | Yes |
Dimension comparison
Overview
The GIGABYTE B850M Gaming X WIFI6E and the GIGABYTE Z790 UD AC are two solid choices in the motherboard market, each catering to different processor families. The B850M is designed for AMD Ryzen processors, while the Z790 UD AC supports Intel Core processors. This fundamental difference influences their features, performance, and overall suitability for various builds.
Performance Potential
The GIGABYTE B850M Gaming X WIFI6E is built to support AMD Ryzen 9000, 8000, and 7000 series processors, offering a robust power design of 10+2+2 phases. This configuration is aimed at providing stable performance under load, making it ideal for gaming and heavy multitasking. In contrast, the GIGABYTE Z790 UD AC supports Intel Core 14th, 13th, and 12th generation processors, featuring a more advanced 16+1+1 power phase design. This design not only enhances stability but also allows for better overclocking potential, making the Z790 a powerful choice for enthusiasts.
Connectivity Options
When it comes to connectivity, the GIGABYTE Z790 UD AC edges out the B850M. The Z790 offers three M.2 slots compared to the B850M's two, allowing for greater expansion potential for high-speed storage solutions. Both motherboards support PCIe 5.0, ensuring compatibility with the latest graphics cards and SSDs. Additionally, both motherboards feature USB-C ports for modern connectivity, but the Z790 UD AC includes USB 3.2 Gen 2x2, which provides faster data transfer rates compared to the standard offerings found on the B850M.
Memory Support
In terms of memory, both motherboards support DDR5 memory, which is essential for high-performance computing and gaming. The B850M Gaming X allows for up to four DIMMs, while the Z790 UD AC also supports dual-channel DDR5 with four DIMMs. This similarity means that both boards can handle high-speed memory, but the Z790 UD AC's overall power design may lead to better memory performance and stability, especially under overclocked conditions.
Thermal Management
Thermal management is crucial for maintaining system performance, and both GIGABYTE motherboards come equipped with comprehensive thermal solutions. The B850M features fully covered MOSFET heatsinks, which help in dissipating heat during extensive operations. On the other hand, the Z790 UD AC not only has fully covered MOSFET heatsinks but also includes an M.2 thermal guard and ultra-durable armor, providing an extra layer of protection against overheating and ensuring longevity under heavy workloads.
Price Comparison
The GIGABYTE B850M Gaming X WIFI6E is priced at $149.91, while the GIGABYTE Z790 UD AC is slightly higher at $149.99. This means the Z790 UD AC is about 0.05% more expensive than the B850M. Given this minimal price difference, the features and performance enhancements offered by the Z790 UD AC may justify the slight premium for buyers seeking advanced capabilities. However, for those on a tighter budget or specifically building an AMD-based system, the B850M remains a compelling option.
Warranty and Support
Both motherboards come with a 5-year warranty, which is a testament to GIGABYTE's confidence in their products and provides peace of mind for buyers. This extended warranty period is beneficial for users investing in a new build, ensuring that any issues can be resolved without additional cost. While warranty length is the same for both, customer support experiences may vary based on location and individual case scenarios.
Aesthetics and Build Quality
In terms of aesthetics, the GIGABYTE Z790 UD AC features RGB Fusion support, allowing users to customize lighting effects for a more personalized build. This is a notable advantage for gamers and PC builders who prioritize visual appeal. The B850M Gaming X, while not specifically mentioned to have RGB lighting, maintains a sleek design that fits well in most builds. Both motherboards are constructed with high-quality materials, ensuring durability and a robust build quality.
Which should you buy?
Ultimately, the choice between the GIGABYTE B850M Gaming X WIFI6E and the GIGABYTE Z790 UD AC boils down to your specific needs and preferences. If you’re building a system around an AMD processor and need a reliable, cost-effective motherboard, the B850M is a solid choice. However, if you are looking for a motherboard that offers more advanced features, better thermal management, and greater expansion options for an Intel processor, the Z790 UD AC is worth the slight price increase. Each motherboard has its strengths, catering to different user requirements, making either a strong contender in the motherboard market.

