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ASRock B550 Phantom Gaming 4 AC Supports 3rd Gen vs GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard,

Updated August 2026 — GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard, leads on memory and performance.

The GIGABYTE Z790 Eagle AX offers superior performance and features compared to the ASRock B550 Phantom Gaming 4 AC, making it the better choice for high-end gaming setups.

Why ASRock B550 Phantom Gaming 4 AC Supports 3rd Gen is better

Price

More budget-friendly at $100.71

AMD Support

Supports 3rd Gen AMD Ryzen processors

Design

Appealing gaming-oriented design

Why GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard, is better

Performance

Advanced power design with 12+1+1 phases

Memory

Supports faster DDR5 memory

Connectivity

Includes PCIe 5.0 and USB 3.2 Gen 2x2 Type-C

Overall score

ASRock B550 Phantom Gaming 4 AC Supports 3rd Gen
70
GIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard,
85

Specifications

SpecASRock B550 Phantom Gaming 4 AC Supports 3rd GenGIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard,
SocketAM4LGA 1700
Power Phases812+1+1
Memory TypeDDR4DDR5
Expansion Slots1x PCIe 4.0PCIe 5.0
USB PortsStandardUSB 3.2 Gen 2x2 Type-C

Dimension comparison

ASRock B550 Phantom Gaming 4 AC Supports 3rd GenGIGABYTE Z790 Eagle AX LGA 1700 ATX Motherboard,

Overview of the ASRock B550 Phantom Gaming 4 AC and GIGABYTE Z790 Eagle AX

When comparing the ASRock B550 Phantom Gaming 4 AC and the GIGABYTE Z790 Eagle AX, the main difference lies in their target processors and performance capabilities. The ASRock motherboard supports 3rd Gen AMD AM4 Ryzen processors, while the GIGABYTE board is designed for Intel's 14th, 13th, and 12th Gen Core processors. This means that your choice will heavily depend on the CPU brand you prefer or already own.

The ASRock B550 is priced at $100.71, making it budget-friendly compared to the GIGABYTE Z790, which costs $159.99. This translates to a price difference of about 37%. If you are looking to build a gaming rig on a tighter budget, the ASRock motherboard is definitely an appealing option.

Performance and Power Design

In terms of performance, the GIGABYTE Z790 Eagle AX boasts a more advanced power design featuring a twin 12+1+1 phase digital VRM solution. This setup facilitates better power distribution, enhancing stability during heavy workloads. On the other hand, the ASRock B550 features an 8 power phase design, which, while adequate for most gaming scenarios, may not provide the same level of performance under extreme conditions.

The GIGABYTE model also supports DDR5 memory, whereas the ASRock only supports DDR4. This could be a significant factor for gamers and content creators looking for maximum speed and efficiency. Overall, if high-performance gaming is your goal, the GIGABYTE Z790 may be the better choice.

Memory Compatibility

The ASRock B550 Phantom Gaming 4 AC supports DDR4 memory at speeds of up to 4733+ (OC), while the GIGABYTE Z790 Eagle AX is equipped for dual-channel DDR5 across four DIMMs. This difference in memory compatibility is crucial for users who want the latest and fastest RAM available.

If you are planning to future-proof your build with the latest technology, the GIGABYTE motherboard provides a clear advantage. DDR5 memory is designed to deliver higher bandwidth and improved efficiency compared to DDR4, making it a superior choice for high-performance applications.

Expansion Slots and Connectivity

Both motherboards offer solid expansion options, but they differ in connectivity features. The ASRock B550 includes one PCIe 4.0 x16 slot and two PCIe 3.0 x1 slots, while the GIGABYTE Z790 features more advanced options with PCIe 5.0 support. This means that the GIGABYTE motherboard is better equipped for next-gen graphics cards and NVMe drives, which could significantly enhance gaming performance and loading times.

In terms of USB connectivity, the GIGABYTE Z790 provides USB 3.2 Gen 2x2 Type-C, which is not available on the ASRock board. This makes the GIGABYTE a more versatile option for users who require high-speed data transfer or are utilizing multiple peripherals.

Thermal Management

Thermal management is another critical aspect of motherboard design, especially for gaming. The GIGABYTE Z790 Eagle AX includes an advanced thermal design with enlarged MOSFET heatsinks and an M.2 thermal guard. This ensures that the components remain cool during heavy use, which can prolong the lifespan of the motherboard and other installed parts.

In contrast, the ASRock B550 does not specify any advanced thermal features, which may leave it at a disadvantage during prolonged gaming sessions. Proper thermal management is essential for maintaining optimal performance, making the GIGABYTE a more robust choice in this regard.

Design and Aesthetics

When it comes to aesthetics, both the ASRock B550 and GIGABYTE Z790 offer visually appealing designs that cater to gamers. The ASRock model features a striking look designed specifically for a gaming audience, while the GIGABYTE Z790 incorporates RGB Fusion technology for customizable lighting effects.

If visual customization is important to you, the GIGABYTE Z790 provides more options. However, if you prefer a straightforward gaming design without the need for additional lighting, the ASRock B550 may be sufficient.

Pricing and Value

The ASRock B550 Phantom Gaming 4 AC is priced at $100.71, making it a cost-effective option for budget-conscious gamers. Meanwhile, the GIGABYTE Z790 Eagle AX is priced at $159.99, which is about 37% more expensive. This price difference could be a decisive factor for many consumers, especially those who are looking to build a gaming setup without breaking the bank.

While the GIGABYTE offers superior features and performance, the value proposition of the ASRock B550 cannot be overlooked. For gamers on a budget, it presents a compelling option without sacrificing too much in terms of essential features.

Which should you buy?

Deciding between the ASRock B550 Phantom Gaming 4 AC and the GIGABYTE Z790 Eagle AX ultimately depends on your specific needs and preferences. If you are looking for a budget-friendly motherboard that supports AMD processors and offers decent performance, the ASRock B550 is a solid choice at $100.71.

However, if you want to invest in a more advanced motherboard that supports the latest Intel processors, DDR5 memory, and superior thermal management, the GIGABYTE Z790 Eagle AX is worth the extra cost at $159.99. It provides better performance and future-proofing capabilities. In the end, your decision should be based on your current setup, gaming goals, and budget.