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ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA vs MSI MPG B550 Gaming Plus V1 Gaming Motherboard

Updated July 2026 — ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA wins on compatibility, MSI MPG B550 Gaming Plus V1 Gaming Motherboard wins on memory and price.

The MSI MPG B550 Gaming Plus V1 offers superior performance and features compared to the ASRock B450M/AC. For gamers and high-performance users, the MSI is the better choice.

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

Price

ASRock is significantly cheaper at $79.00.

Compatibility

Supports a wider range of AMD processors.

Basic Use

Suitable for everyday tasks and light gaming.

Why MSI MPG B550 Gaming Plus V1 Gaming Motherboard is better

Performance

Higher memory capacity and speed.

Gaming Features

Includes advanced gaming features like M.2 Shield Frozr.

Aesthetics

Offers RGB lighting customization options.

Overall score

ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA
70
MSI MPG B550 Gaming Plus V1 Gaming Motherboard
85

Specifications

SpecASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATAMSI MPG B550 Gaming Plus V1 Gaming Motherboard
Processor SupportAMD AM4 (2000-5000)3rd Gen AMD Ryzen + future
Memory SupportDDR4 3200DDR4 up to 4400
PCIe VersionPCIe 3.0PCIe 4.0
M.2 SupportNoYes
RGB LightingNoYes

Dimension comparison

ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATAMSI MPG B550 Gaming Plus V1 Gaming Motherboard

Introduction to the Motherboards

In this comparison, we will explore two notable motherboards: the ASRock B450M/AC R2.0 and the MSI MPG B550 Gaming Plus V1. The ASRock B450M/AC is priced at $79.00, making it a budget-friendly option, while the MSI MPG B550 Gaming Plus V1 comes in at $139.99, approximately 77% more expensive. Both motherboards cater to AMD processors but offer different features and specifications that may appeal to various users.

Compatibility with Processors

The ASRock B450M/AC supports a range of AMD AM4 socket processors, including Ryzen 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series desktop processors. This extensive compatibility makes it a versatile choice for users looking to build or upgrade a system with older or newer AMD processors. In contrast, the MSI MPG B550 Gaming Plus V1 is specifically designed for 3rd Gen AMD Ryzen processors and promises future compatibility with newer processors through BIOS updates. This ensures that users can leverage upcoming advancements in AMD technology.

Memory Support

When it comes to memory, the ASRock B450M/AC supports DDR4 memory, with a maximum speed of 3200 MHz. This allows for decent performance in everyday tasks and gaming. On the other hand, the MSI MPG B550 Gaming Plus V1 supports dual-channel DDR4 memory and can handle up to 128 GB, with speeds reaching 4400 MHz. This significant difference in memory capacity and speed positions the MSI motherboard as a superior choice for gamers and professionals requiring higher performance and multitasking capabilities.

Expansion Slots and Connectivity

The ASRock B450M/AC features one PCIe 3.0 x16 slot and one PCIe 2.0 x16 slot, which cater to a basic level of expansion. It also supports AMD Quad CrossFireX for multi-GPU setups, which is a plus for users interested in enhanced graphics performance. In contrast, the MSI MPG B550 Gaming Plus V1 offers more robust expansion possibilities with its support for PCIe 4.0. This allows for greater bandwidth and faster data transfer rates, particularly beneficial for high-speed SSDs and advanced graphics cards.

Gaming Features

Gaming enthusiasts may find the MSI MPG B550 Gaming Plus V1 more appealing due to its gaming-centric features. It boasts M.2 Shield Frozr technology, designed to keep M.2 SSDs cool, thereby ensuring sustained performance during intense gaming sessions. Additionally, it features AMD Turbo USB 3.2 Gen 2 for faster data transfer and a premium thermal solution with an extended heatsink. The ASRock B450M/AC, while capable, lacks these advanced gaming features and thermal management solutions, making the MSI board a better fit for serious gamers.

Aesthetic and RGB Lighting

The MSI MPG B550 Gaming Plus V1 includes MYSTIC LIGHT, which provides RGB LED lighting with the capability of displaying 16.8 million colors and 29 effects. This feature allows users to customize their gaming rig’s aesthetics, enhancing the overall gaming experience. In contrast, the ASRock B450M/AC does not have built-in RGB lighting, which may be a disadvantage for users who prioritize visual flair in their builds. The MSI board’s lighting options can significantly enhance the visual appeal of a gaming setup.

Price Considerations

The ASRock B450M/AC is priced at $79.00, making it an appealing option for budget-conscious builders. Conversely, the MSI MPG B550 Gaming Plus V1 is priced at $139.99, which is about 77% more expensive than the ASRock model. While the MSI motherboard offers advanced features and better performance, the higher cost may not be justified for users with simpler needs or those building a basic system. Therefore, budget considerations play a crucial role in deciding between the two.

User Experience and Build Quality

Both motherboards are designed for reliability, but their intended user experiences differ. The ASRock B450M/AC is suitable for users looking for an affordable, straightforward motherboard for everyday tasks and light gaming. In contrast, the MSI MPG B550 Gaming Plus V1 focuses on delivering a high-performance experience, featuring premium components and better thermal management for overclocking and gaming. Users seeking a high-end experience will likely find the MSI's build quality and features more aligned with their expectations.

Which should you buy?

In choosing between the ASRock B450M/AC and the MSI MPG B550 Gaming Plus V1, your decision will largely depend on your specific needs and budget. If you are looking for an affordable motherboard that supports a wide range of AMD processors for basic use, the ASRock B450M/AC at $79.00 is a solid choice. However, for those who demand higher memory capacity, faster performance, and enhanced gaming features, the MSI MPG B550 Gaming Plus V1, priced at $139.99, is worth the investment. Ultimately, your selection should align with your performance requirements and financial considerations.