ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA vs MSI MAG B850M Mortar WiFi Motherboard, mATX
Updated July 2026 — MSI MAG B850M Mortar WiFi Motherboard, mATX leads on price and connectivity.
The MSI MAG B850M Mortar WiFi offers superior performance and features compared to the ASRock B450M/AC R2.0, making it the better choice for high-end users.
Why ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA is better
Price
ASRock is significantly cheaper at $79.00.
Basic Use
Suitable for mainstream applications.
Legacy Support
Supports older Ryzen processors.
Why MSI MAG B850M Mortar WiFi Motherboard, mATX is better
Performance
Supports latest Ryzen 9000 series processors.
Memory
Supports DDR5 memory up to 8200 MT/s.
Connectivity
Includes Wi-Fi 7 and advanced USB options.
Overall score
Specifications
| Spec | ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA | MSI MAG B850M Mortar WiFi Motherboard, mATX |
|---|---|---|
| Processor Support | Ryzen 2000-5000 | Ryzen 9000/8000/7000 |
| Memory Type | DDR4 | DDR5 |
| Max Memory Speed | 3200 MT/s | 8200 MT/s |
| PCIe Version | 3.0 | 5.0 |
| Wi-Fi | No | Wi-Fi 7 |
Dimension comparison
Overview of the ASRock B450M/AC R2.0 and MSI MAG B850M Mortar WiFi
The ASRock B450M/AC R2.0 is priced at $79.00, making it significantly more budget-friendly compared to the MSI MAG B850M Mortar WiFi, which retails for $219.99. This represents a price difference of about 178%, placing the ASRock option firmly in the entry-level category while the MSI motherboard targets high-end users looking for advanced features.
The ASRock B450M/AC R2.0 is designed to support AMD’s Ryzen 2000 to 5000 series processors, while the MSI MAG B850M Mortar WiFi is built for the latest Ryzen 9000, 8000, and 7000 series processors. This distinction in processor support reflects the technological advancements between the two, with the MSI board catering to more demanding applications.
Build Quality and Design
Build quality is a key consideration when selecting a motherboard. The MSI MAG B850M Mortar WiFi boasts a durable 8-layer PCB with 2oz of thickened copper, providing enhanced stability and longevity. It is equipped with a 12 Duet Rail Power System (60A, SPS) VRM, specifically designed to support the latest Ryzen processors effectively.
In contrast, the ASRock B450M/AC R2.0, while sturdy, does not incorporate the same level of premium materials or advanced power delivery systems. It is nevertheless suitable for mainstream use, particularly for those who do not require the latest technology or high-performance features.
Processor Compatibility
When it comes to processor compatibility, the MSI MAG B850M Mortar WiFi stands out due to its support for the latest AMD Ryzen 9000 series processors. This motherboard is engineered to handle the increased power demands and performance capabilities of these advanced CPUs.
On the other hand, the ASRock B450M/AC R2.0 supports older Ryzen processors from the 2000 to 5000 series. This may limit future upgrade paths for users looking to adopt the latest technology. If you plan on utilizing the newest CPUs, the MSI option is undoubtedly the better choice.
Memory Support
The MSI MAG B850M Mortar WiFi supports DDR5 memory up to 8200 MT/s, allowing for high-speed memory performance suitable for gaming and professional applications. This feature is crucial for users who demand the utmost speed and efficiency from their systems.
In contrast, the ASRock B450M/AC R2.0 supports DDR4 memory up to 3200 MT/s. While sufficient for most general applications and gaming, it does not match the performance capabilities of the MSI motherboard, making it less desirable for high-performance builds.
Connectivity Options
Connectivity is another area where the MSI MAG B850M Mortar WiFi excels. It includes a full-speed Wi-Fi 7 module with Bluetooth 5.4, 5Gbps LAN, USB 20G Type-C, and robust audio support with 7.1 USB High Performance Audio. This extensive range of connectivity options ensures compatibility with a variety of peripherals and networking standards.
The ASRock B450M/AC R2.0 offers more basic connectivity, primarily focusing on HDMI outputs and standard USB ports. While adequate for general use, it lacks the advanced networking features and fast data transfer capabilities found in the MSI board. Users who prioritize top-tier connectivity should lean towards the MSI option.
Cooling Solutions
For cooling, the MSI MAG B850M Mortar WiFi is equipped with several premium cooling features, including a chipset heatsink and EZ M.2 Shield Frozr II, designed to prevent thermal throttling. This level of cooling is essential for high-performance systems, especially when running demanding applications or overclocking components.
The ASRock B450M/AC R2.0 does not feature the same advanced cooling solutions. While it is designed to manage heat effectively, users who plan to push their systems to the limit may find it lacking in this regard. The MSI motherboard’s superior cooling solutions make it the better choice for high-performance users.
Gaming Performance
The MSI MAG B850M Mortar WiFi is designed specifically with gaming in mind, supporting the latest graphics cards with its PCIe 5.0 x16 slot. This capability ensures that gamers can take full advantage of cutting-edge graphics technology for an enhanced gaming experience.
In contrast, the ASRock B450M/AC R2.0 supports only PCIe 3.0, which may limit the performance of more modern graphics cards. Gamers looking for future-proofing and maximum performance should consider the MSI motherboard as the superior option for gaming.
Which should you buy?
In conclusion, if you are looking for a cost-effective motherboard for basic use with older Ryzen processors, the ASRock B450M/AC R2.0, priced at $79.00, is a decent choice. However, for users who want the latest technology, superior build quality, enhanced connectivity, and high-performance capabilities, the MSI MAG B850M Mortar WiFi at $219.99 offers a far more compelling package. Its support for the latest AMD processors and DDR5 memory makes it the clear winner for those seeking a robust and future-proof motherboard.