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ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA vs ASUS ROG STRIX B860-I GAMING WIFI B860 LGA 1851

Updated July 2026 — ASUS ROG STRIX B860-I GAMING WIFI B860 LGA 1851 leads on memory and price.

The ASUS ROG STRIX B860-I offers superior features and performance for high-end users, while the ASRock B450M/AC R2.0 is a budget-friendly option. Choose based on your specific needs.

Why ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA is better

Price

ASRock B450M/AC R2.0 is significantly cheaper.

Compatibility

Supports a wide range of AMD processors.

Basic Features

Adequate for budget builds.

Why ASUS ROG STRIX B860-I GAMING WIFI B860 LGA 1851 is better

Performance

Higher performance with advanced features.

Memory Support

Supports the latest DDR5 memory.

Networking

Includes 2.5G LAN and WiFi 7.

Overall score

ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA
65
ASUS ROG STRIX B860-I GAMING WIFI B860 LGA 1851
85

Specifications

SpecASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATAASUS ROG STRIX B860-I GAMING WIFI B860 LGA 1851
SocketAM4LGA 1851
PCIe Version3.05.0
WiFiNoYes
AI FeaturesNoYes
Form FactorMicro ATXMini ITX

Dimension comparison

ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATAASUS ROG STRIX B860-I GAMING WIFI B860 LGA 1851

Overview of the ASRock B450M/AC R2.0 and ASUS ROG STRIX B860-I

The ASRock B450M/AC R2.0 is priced at $79.00, while the ASUS ROG STRIX B860-I is significantly more expensive at $207.99. This price difference of about 163% reflects the distinct target markets and feature sets of these two motherboards. While the ASRock model caters to budget-conscious users looking for solid performance in an AMD setup, the ASUS motherboard is designed for high-end gaming and AI applications with advanced features.

Compatibility and Processor Support

The ASRock B450M/AC R2.0 supports AMD AM4 socket processors, including Ryzen 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series Desktop Processors. This wide compatibility allows users to choose from a range of AMD processors that fit their performance needs. Conversely, the ASUS ROG STRIX B860-I is built for the Intel LGA 1851 socket, making it ready for the Intel Core Ultra processors (Series 2). This distinction emphasizes the need for users to decide which platform (AMD or Intel) aligns best with their preferences and existing hardware.

Memory Support

Memory support varies significantly between the two motherboards. The ASRock B450M/AC R2.0 supports DDR4 memory up to 3200MHz, which is standard for many mid-range systems. In contrast, the ASUS ROG STRIX B860-I supports DDR5 memory, which is the latest generation, offering improved speeds and efficiency. This difference could be a critical factor for users looking to future-proof their systems and take advantage of the latest advancements in memory technology.

Expansion Slots and Connectivity

When it comes to expansion slots, the ASRock B450M/AC R2.0 features one PCIe 3.0 x16 and one PCIe 2.0 x16 slot, providing decent options for graphics cards and additional components. However, the ASUS ROG STRIX B860-I takes expansion to the next level with PCIe 5.0 x16 support, which can significantly enhance performance for next-gen GPUs. Additionally, the ASUS motherboard includes Thunderbolt™ 4 connectivity, providing versatile options for external devices, which is absent in the ASRock model.

Networking Capabilities

The networking features of these two motherboards highlight their targeted use cases. The ASRock B450M/AC R2.0 includes basic networking options suitable for general use, while the ASUS ROG STRIX B860-I is equipped with 2.5G LAN and WiFi 7 capabilities. This advanced networking support enhances online gaming and streaming experiences, making the ASUS board a better choice for users who prioritize high-speed internet connectivity and low latency.

Power Delivery and Thermal Management

Power delivery is crucial for system stability, especially under load. The ASUS ROG STRIX B860-I boasts a robust power solution with 10(80A)+1(80A)+2(80A)+1(80A) power stages, which ensures efficient power distribution to the CPU. In contrast, the ASRock B450M/AC R2.0 does not provide specific details regarding its power stages, suggesting it may not be optimized for high-performance scenarios. Moreover, the thermal management in the ASUS model includes massive heatsinks and thermal pads to maintain optimal operating temperatures, an essential feature for gaming and demanding applications.

Advanced Features and Technologies

The ASUS ROG STRIX B860-I is particularly notable for its advanced features tailored for gaming and AI applications. It incorporates exclusive ASUS AI technologies, such as ASUS AI Advisor and AI Networking II, enhancing the user experience and system performance. The ASRock B450M/AC R2.0, while functional, does not offer similar advanced features, which may limit its appeal to users looking for cutting-edge technology in their builds.

Which should you buy?

Choosing between the ASRock B450M/AC R2.0 and the ASUS ROG STRIX B860-I ultimately depends on your specific needs and budget. If you are building a budget-friendly system with AMD components, the ASRock B450M/AC R2.0 at $79.00 could be the right choice. However, if you are looking for a high-performance motherboard with advanced features for gaming or AI applications, the ASUS ROG STRIX B860-I at $207.99 offers superior capabilities and future-proofing. Thus, your decision should hinge on whether you prioritize cost-effectiveness or cutting-edge technology and features.