ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA vs GIGABYTE B650 Eagle AX AM5 LGA 1718 AMD B650 ATX
Updated July 2026 — GIGABYTE B650 Eagle AX AM5 LGA 1718 AMD B650 ATX leads on price and connectivity.
The GIGABYTE B650 Eagle AX offers superior performance and features compared to the ASRock B450M/AC R2.0, making it the better choice for modern builds.
Why ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA is better
Price
ASRock is significantly cheaper at $79.00.
Compatibility
Supports older Ryzen processors.
Basic Features
Adequate for basic gaming and productivity.
Why GIGABYTE B650 Eagle AX AM5 LGA 1718 AMD B650 ATX is better
Performance
Better memory support with DDR5.
Expansion
More M.2 slots for storage.
Connectivity
Includes USB 3.2 Gen 2x2 and Wi-Fi 6E.
Overall score
Specifications
| Spec | ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA | GIGABYTE B650 Eagle AX AM5 LGA 1718 AMD B650 ATX |
|---|---|---|
| Socket Type | AM4 | AM5 |
| Memory Type | DDR4 | DDR5 |
| M.2 Slots | 2 | 3 |
| USB Ports | USB 3.0 | USB 3.2 Gen 2x2 |
| Wi-Fi | No | Yes |
Dimension comparison
Overview of the ASRock B450M/AC R2.0 and GIGABYTE B650 Eagle AX
The ASRock B450M/AC R2.0 is priced at $79.00, while the GIGABYTE B650 Eagle AX costs $139.99, making the latter about 77% more expensive. Both motherboards cater to different segments of the AMD market, with the ASRock board designed for older Ryzen processors and the GIGABYTE model supporting the latest AM5 architecture. This comparison will delve into their specifications, features, and overall performance to help you determine which motherboard best suits your needs.
Compatibility and Socket Support
The ASRock B450M/AC R2.0 supports the AM4 socket, accommodating a range of AMD Ryzen processors from the 2000 to 5000 series, including the 5000 G-Series. In contrast, the GIGABYTE B650 Eagle AX utilizes the newer AM5 socket, specifically designed for AMD Ryzen 7000 series processors. This key difference in socket compatibility means that users looking to upgrade to the latest generation of Ryzen CPUs will need the GIGABYTE, while those with older processors can opt for the ASRock model.
Memory Support
In terms of memory, the ASRock B450M/AC R2.0 supports DDR4 memory with a maximum speed of 3200 MHz, which is adequate for most gaming and productivity tasks. On the other hand, the GIGABYTE B650 Eagle AX is compatible with DDR5, offering four SMD DIMMs with support for AMD EXPO and Intel XMP memory modules. This allows for greater memory bandwidth and faster speeds, making it a superior choice for high-performance builds, especially in gaming and content creation.
Expansion Slots
The ASRock B450M/AC R2.0 features one PCIe 3.0 x16 slot and one PCIe 2.0 x16 slot, which limits expansion options for users who may want to install multiple graphics cards or other PCIe devices. Conversely, the GIGABYTE B650 Eagle AX provides a more robust configuration with three M.2 slots: one PCIe 5.0 and two PCIe 4.0, ensuring high-speed storage options and improved performance in data-intensive applications. This makes the GIGABYTE a better choice for users looking to maximize their system's upgrade potential.
Graphics and Output Options
In terms of graphics output, the ASRock B450M/AC R2.0 includes HDMI output, which allows for easy connection to monitors. However, it lacks advanced features like support for higher refresh rates or resolutions that newer boards might offer. The GIGABYTE B650 Eagle AX, while not detailing its graphics output capabilities, is likely to support more advanced graphics features due to its modern architecture and better bandwidth, appealing to gamers and professionals needing high-resolution display support.
Connectivity Options
The connectivity options also differ significantly. The ASRock B450M/AC R2.0 provides basic connectivity but lacks modern standards like USB 3.2 Gen 2 or Wi-Fi 6. In contrast, the GIGABYTE B650 Eagle AX is equipped with USB 3.2 Gen 2x2 Type-C and also features AMD Wi-Fi 6E, ensuring faster data transfer speeds and improved wireless connectivity. This makes the GIGABYTE a more future-proof option, especially for users who rely on high-speed data transfers and wireless networking.
Price Comparison and Value
The ASRock B450M/AC R2.0 is priced at $79.00, while the GIGABYTE B650 Eagle AX is listed at $139.99. This price difference of $60 highlights the budget-friendly nature of the ASRock board, making it suitable for users with limited budgets or those who do not require the latest technology. However, the additional features and future-proofing offered by the GIGABYTE justify its higher price tag for users looking for performance and longevity in their hardware.
User Experience and Performance
While exact sales ranks for these motherboards are not provided, the GIGABYTE B650 Eagle AX is poised to offer a more advanced user experience due to its superior specifications, including enhanced thermal design and a more robust power delivery system with a 12 plus 2 plus 2 Phases Digital VRM Solution. This improvement is particularly beneficial for gamers and content creators who push their systems to the limit, ensuring stability and performance during intensive tasks.
Which should you buy?
Ultimately, the choice between the ASRock B450M/AC R2.0 and the GIGABYTE B650 Eagle AX depends on your specific needs and budget. If you are looking for an affordable option that supports older Ryzen processors and basic gaming or productivity tasks, the ASRock model at $79.00 is a solid choice. However, if you desire the latest technology, better memory support, enhanced connectivity options, and overall superior performance, the GIGABYTE B650 Eagle AX at $139.99 is worth the investment.

