ASRock B550 Phantom Gaming 4 AC Supports 3rd Gen vs GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,
Updated August 2026 — GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, leads on performance and memory.
The GIGABYTE Z790 UD AC offers superior performance and advanced features, making it the better choice for Intel users. The ASRock B550 Phantom Gaming 4 AC is a solid budget option for AMD enthusiasts.
Why ASRock B550 Phantom Gaming 4 AC Supports 3rd Gen is better
Price
Lower cost at $100.71
AMD Support
Supports 3rd Gen AMD Ryzen processors
Power Design
8 power phase design for stable performance
Why GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, is better
Performance
Supports Intel's latest 14th Gen processors
Memory
Compatible with DDR5 for faster speeds
Connectivity
Includes PCIe 5.0 and triple M.2 slots
Overall score
Specifications
| Spec | ASRock B550 Phantom Gaming 4 AC Supports 3rd Gen | GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, |
|---|---|---|
| Socket | AM4 | LGA 1700 |
| Max RAM | DDR4 4733+ | DDR5 |
| Power Phases | 8 | 16+1+1 |
| M.2 Slots | 2 | 3 |
| WiFi | No | Yes |
Dimension comparison
Overview of ASRock B550 Phantom Gaming 4 AC
The ASRock B550 Phantom Gaming 4 AC is a solid choice for users looking to build a gaming rig with AMD components. Priced at $100.71, it offers support for 3rd Gen AMD AM4 Ryzen processors and future AMD Ryzen processors, providing a degree of future-proofing for gamers. The motherboard is designed with an 8 power phase configuration, which ensures stable power delivery during intense gaming sessions.
Additionally, the B550 Phantom Gaming 4 AC supports DDR4 memory speeds of up to 4733+ (OC), enabling users to take advantage of high-speed RAM for better performance. The graphics output options include HDMI, allowing for easy connectivity to modern displays. Overall, this motherboard is an appealing option for gamers who prefer AMD's ecosystem.
Overview of GIGABYTE Z790 UD AC
The GIGABYTE Z790 UD AC is positioned as a premium motherboard for Intel users, with a price tag of $149.99. Designed to support Intel's 14th, 13th, and 12th Gen processors, it provides a high-performance platform for gamers and content creators alike. The motherboard features a robust 16+1+1 power phase design, ensuring reliable power distribution even under heavy loads.
Moreover, the Z790 UD AC is compatible with DDR5 memory, allowing for faster data transfer rates and improved overall performance. It also includes advanced connectivity options such as PCIe 5.0 and triple NVMe PCIe 4.0 x4 M.2 slots, making it an excellent choice for those who prioritize speed and efficiency in their builds. This motherboard is particularly suited for gamers looking for cutting-edge technology to enhance their gaming experience.
Performance Comparison
In terms of performance, the ASRock B550 Phantom Gaming 4 AC and GIGABYTE Z790 UD AC cater to different segments of the market, but both aim to deliver exceptional gaming experiences. The ASRock motherboard, with its support for 3rd Gen AMD Ryzen processors, is ideal for users who are invested in AMD's ecosystem. Its 8 power phase design contributes to stable performance under load, making it suitable for gaming and multitasking.
On the other hand, the GIGABYTE Z790 UD AC excels in offering next-gen features such as PCIe 5.0 support and DDR5 compatibility, which can significantly enhance data transfer rates and overall system responsiveness. Users who opt for this motherboard can expect improved performance, especially in tasks that require high bandwidth, such as gaming at higher resolutions or content creation. The differences in processor compatibility and memory support will heavily influence the performance outcomes based on user needs.
Connectivity Options
Connectivity is a crucial aspect to consider when comparing these two motherboards. The ASRock B550 Phantom Gaming 4 AC offers a range of connection options, including one PCIe 4.0 x16 slot, one PCIe 3.0 x16 slot, and two PCIe 3.0 x1 slots. This setup provides sufficient expansion capabilities for most gaming setups, though it may not be as future-proof as its competitor.
In contrast, the GIGABYTE Z790 UD AC provides a more comprehensive connectivity suite with PCIe 5.0 support, enabling faster data transfer rates and better overall performance. It features three M.2 slots for NVMe SSDs, allowing for rapid storage solutions that can significantly reduce load times in games and applications. The inclusion of USB-C 3.2 ports on the GIGABYTE motherboard further enhances its connectivity, making it a more versatile option for modern peripherals.
Power Design and Efficiency
When it comes to power design, the ASRock B550 Phantom Gaming 4 AC features an 8 power phase design with Digi Power technology. This configuration helps in distributing power efficiently, ensuring that the motherboard can handle the demands of gaming without overheating or throttling. However, it may not be as robust as the GIGABYTE model.
The GIGABYTE Z790 UD AC stands out with its 16+1+1 Twin Hybrid Phases Digital Power Design, which incorporates 60A DrMOS. This advanced power delivery system not only supports high-performance processors but also enhances overall efficiency, making it suitable for overclocking scenarios. The GIGABYTE motherboard's comprehensive thermal design, including fully covered MOSFET heatsinks, ensures that it maintains optimal temperatures even during demanding tasks.
Gaming Features
Both motherboards are designed with gaming in mind, but they cater to different user preferences. The ASRock B550 Phantom Gaming 4 AC emphasizes a gaming-oriented aesthetic and is tailored for AMD users, making it a great choice for those who want a stylish, functional motherboard that supports the latest AMD processors.
Conversely, the GIGABYTE Z790 UD AC promises an elevated gaming experience with its advanced features. It boasts RGB Fusion for customizable lighting effects, enhancing the visual appeal of a gaming setup. Additionally, its dual-band WiFi and 2.5GbE support ensure stable online gaming with minimal lag, appealing to competitive gamers who prioritize performance.
Pricing and Value
The ASRock B550 Phantom Gaming 4 AC is priced at $100.71, making it a budget-friendly option in the motherboard market. It offers excellent value for users looking to build a capable gaming rig without breaking the bank. For those who primarily use AMD components, this motherboard presents a compelling choice.
In contrast, the GIGABYTE Z790 UD AC comes with a higher price tag of $149.99. While it is more expensive—about 48% higher than the ASRock model—it justifies this with advanced features and next-gen support that could be beneficial for users seeking the latest technology. The investment may be worthwhile for gamers looking for top-tier performance and future-proofing in their builds.
Which should you buy?
Choosing between the ASRock B550 Phantom Gaming 4 AC and the GIGABYTE Z790 UD AC ultimately depends on your specific needs and existing hardware. If you are an AMD enthusiast looking for a cost-effective motherboard that supports Ryzen processors, the ASRock model at $100.71 is a solid choice. It offers essential gaming features and adequate performance for most users.
However, if you prefer Intel's ecosystem and are willing to invest more for cutting-edge technology, the GIGABYTE Z790 UD AC at $149.99 provides superior performance and advanced features, making it a worthwhile option for serious gamers and content creators. Ultimately, understanding your requirements will guide you in making the best choice between these two capable motherboards.

