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GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, vs MSI MAG B550 Tomahawk Gaming Motherboard

Updated August 2026 — GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, leads on power design and features.

The GIGABYTE Z790 UD AC offers superior performance and future-proofing features, making it the better choice for Intel users. However, the MSI MAG B550 Tomahawk is a solid option for budget-conscious AMD gamers.

Why GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, is better

Power Design

16+1+1 power phase for stability

Memory Support

Supports DDR5 for higher speeds

Future-Proofing

PCIe 5.0 for next-gen GPUs

Why MSI MAG B550 Tomahawk Gaming Motherboard is better

Price

Cheaper by $15

Audio Quality

Audio Boost for immersive sound

RGB Lighting

Customizable Mystic Light technology

Overall score

GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,
88
MSI MAG B550 Tomahawk Gaming Motherboard
82

Specifications

SpecGIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,MSI MAG B550 Tomahawk Gaming Motherboard
SocketLGA 1700AM4
DDR SupportDDR5DDR4
PCIe Version5.04.0
Max Memory128 GB128 GB
LAN2.5GbE2.5G + Gigabit

Dimension comparison

GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,MSI MAG B550 Tomahawk Gaming Motherboard

Overview of the GIGABYTE Z790 UD AC

The GIGABYTE Z790 UD AC is designed for users looking to leverage the latest Intel Core processors. This motherboard supports Intel’s 14th, 13th, and 12th Gen CPUs and boasts a robust power design, making it a strong contender for gamers and content creators alike. Priced at $149.99, it offers features such as DDR5 support, PCIe 5.0 compatibility, and enhanced thermal management.

With a 16+1+1 power phase design, the GIGABYTE motherboard ensures stability during high-performance tasks. It features comprehensive cooling solutions, including fully covered MOSFET heatsinks and a thermal guard for M.2 SSDs, which are critical for maintaining optimal performance during extended usage. The inclusion of USB-C 3.2 and dual-band WiFi support further enhances connectivity options, making this motherboard a solid choice for modern setups.

Overview of the MSI MAG B550 Tomahawk

The MSI MAG B550 Tomahawk, priced at $134.99, is an excellent choice for AMD enthusiasts, particularly those looking to use Ryzen 5000 series processors. This motherboard supports dual channel DDR4 memory and offers advanced connectivity options, including PCIe 4.0 and USB 3.2 Gen 2. With its premium thermal solution and audio enhancements, it caters well to gamers who demand both performance and immersive audio experiences.

Equipped with Mystic Light technology, the MSI motherboard allows for customizable RGB lighting, enhancing the aesthetic appeal of any gaming rig. Additionally, it supports dual LAN, including a 2.5G LAN port, which is beneficial for users seeking faster network speeds and better connectivity options. The B550 Tomahawk is built with longevity in mind, featuring durable components and robust cooling solutions to ensure sustained performance.

Performance and Power Design

In terms of performance, the GIGABYTE Z790 UD AC is engineered for maximum efficiency with its 16+1+1 power phase architecture, which provides superior power delivery to the CPU. This design ensures that even during demanding tasks, the system runs smoothly without hiccups. The dual-channel DDR5 support allows for faster memory speeds and improved bandwidth, which are particularly advantageous for gaming and high-end applications.

Conversely, the MSI MAG B550 Tomahawk supports Ryzen processors with its efficient thermal management and dual channel DDR4 memory capabilities. With a maximum memory support of 128 GB and speeds of up to 4866 MHz, it presents a solid performance framework for gamers. While the B550 Tomahawk does not support DDR5, its PCIe 4.0 support offers substantial speed improvements over previous generations, making it competitive for mainstream gaming.

Connectivity Options

Connectivity is a vital factor in motherboard performance, and both the GIGABYTE and MSI motherboards excel in this area. The GIGABYTE Z790 UD AC features PCIe 5.0, which provides double the bandwidth compared to PCIe 4.0, making it future-proof for next-generation GPUs and SSDs. Additionally, it includes multiple M.2 slots and USB-C 3.2 ports, offering a wide array of connection possibilities for peripherals.

On the other hand, the MSI MAG B550 Tomahawk offers PCIe 4.0, which, while not as advanced as PCIe 5.0, still offers substantial performance improvements over older standards. It also features dual LAN for enhanced networking capabilities, which can be particularly useful for gamers seeking lower latency and higher speeds. Both motherboards offer HDMI and DisplayPort outputs, catering to users who require versatile video outputs.

Thermal Management

Thermal management is crucial for maintaining performance during extended gaming sessions. The GIGABYTE Z790 UD AC is equipped with a comprehensive thermal design, including fully covered MOSFET heatsinks and an M.2 thermal guard. This ensures that the motherboard stays cool, even under heavy loads.

Conversely, the MSI MAG B550 Tomahawk features an extended heatsink design and M.2 Shield Frozr, which are designed to dissipate heat effectively. The use of aluminum covers and thermal pads rated for high performance adds to its cooling efficiency. Both motherboards are built with longevity in mind, but GIGABYTE's design may offer a slight edge in high-performance scenarios due to its advanced cooling solutions.

Audio Quality

Audio quality can significantly enhance the gaming experience, and both motherboards provide impressive audio features. The GIGABYTE Z790 UD AC does not specify audio codec details, but its overall design suggests a focus on high-quality audio performance compatible with modern gaming setups.

In contrast, the MSI MAG B550 Tomahawk features Audio Boost technology, which delivers studio-grade sound quality. This is a notable advantage for gamers who prioritize immersive audio experiences. The inclusion of advanced audio components allows for richer sound and clearer communication during gameplay, making it a strong choice for an engaging gaming experience.

Price Comparison

The GIGABYTE Z790 UD AC is priced at $149.99, while the MSI MAG B550 Tomahawk comes in at a lower price of $134.99. This makes the MSI motherboard about 10% cheaper than the GIGABYTE option. While the price difference is relatively small, it may influence budget-conscious buyers who are looking for a high-performance motherboard without breaking the bank.

When considering the overall value, the features offered by each motherboard justify their respective prices. The GIGABYTE motherboard’s support for next-gen technologies may appeal to those looking to future-proof their systems, while the MSI motherboard provides excellent performance for its price, particularly for gamers focused on AMD platforms.

Which should you buy?

Ultimately, the choice between the GIGABYTE Z790 UD AC and the MSI MAG B550 Tomahawk depends on your specific needs and preferences. If you are an Intel user seeking cutting-edge technology with advanced power design and future-proof capabilities, the GIGABYTE Z790 UD AC is the better option. However, if you are looking for a cost-effective solution with great performance for AMD Ryzen processors, the MSI MAG B550 Tomahawk is an excellent choice. Each motherboard has its strengths, making them suitable for different types of users.