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ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA vs ASRock B650M-HDV M.2 White Micro-ATX AM5

Updated July 2026 — ASRock B650M-HDV M.2 White Micro-ATX AM5 leads on expansion and memory.

The ASRock B650M-HDV offers superior features and future-proofing compared to the B450M/AC R2.0. For modern builds, the B650M-HDV is the better choice.

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

Price

B450M/AC R2.0 is cheaper at $79.00

Compatibility

Supports older Ryzen processors

Basic Features

Sufficient for basic tasks

Why ASRock B650M-HDV M.2 White Micro-ATX AM5 is better

Future-Proofing

Supports latest Ryzen 9000/8000/7000 CPUs

Memory Support

Supports DDR5 RAM up to 8200 MHz

Expansion Options

Includes PCIe 5.0 and dual M.2 slots

Overall score

ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA
70
ASRock B650M-HDV M.2 White Micro-ATX AM5
85

Specifications

SpecASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATAASRock B650M-HDV M.2 White Micro-ATX AM5
SocketAM4AM5
RAM TypeDDR4DDR5
PCIe Version3.05.0
M.2 Slots02
LANStandard2.5G

Dimension comparison

ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATAASRock B650M-HDV M.2 White Micro-ATX AM5

Price Comparison

The ASRock B450M/AC R2.0 is priced at $79.00, while the ASRock B650M-HDV M.2 White is available for $99.99. This makes the B450M/AC R2.0 about 17% cheaper than the B650M-HDV. For budget-conscious consumers or those looking to build a more economical system, the B450M/AC R2.0 offers solid performance without breaking the bank. However, it's essential to consider the features and capabilities of each motherboard, as the price difference reflects significant advancements in technology and compatibility with newer components.

Compatibility with Processors

The ASRock B450M/AC R2.0 supports AMD's AM4 socket and is compatible with Ryzen 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series desktop processors. On the other hand, the ASRock B650M-HDV M.2 White motherboard is designed for the newer AM5 socket and supports the latest Ryzen 9000, 8000, and 7000 series CPUs. This means that if you're looking to build a future-proof system, the B650M-HDV is the better option, allowing you to take advantage of the latest processor technology. Users planning to upgrade to AMD's newest offerings should consider the B650M-HDV for its enhanced compatibility.

Memory Support

In terms of memory, the ASRock B450M/AC R2.0 supports DDR4 RAM up to 3200 MHz. The B650M-HDV, however, offers support for DDR5 RAM, reaching speeds of up to 8200 MHz (OC). This difference in memory technology is significant, as DDR5 provides faster speeds and improved efficiency compared to DDR4. For gamers and content creators who require high bandwidth for demanding applications, the B650M-HDV presents a clear advantage, enabling better performance in memory-intensive tasks.

Expansion Slots and Connectivity

When it comes to expansion capabilities, the ASRock B450M/AC R2.0 features one PCIe 3.0 x16 and one PCIe 2.0 x16 slot, along with support for AMD Quad CrossFireX. In contrast, the B650M-HDV boasts a PCIe 5.0 x16 slot for next-gen GPUs, as well as additional PCIe 4.0 x16, x1 slots, and an M.2 Key E for optional WiFi. The B650M-HDV also provides more versatile connectivity options, including front/rear USB 3.2 Gen2 Type-C and multiple USB 3.2 Gen1 ports, which are crucial for modern peripherals. For users who prioritize future expansion and connectivity, the B650M-HDV is undoubtedly the superior choice.

Storage Options

Storage capabilities differ significantly between these two motherboards. The ASRock B450M/AC R2.0 includes standard SATA3 ports for HDDs but lacks advanced M.2 support. In contrast, the ASRock B650M-HDV offers dual M.2 slots, featuring one PCIe Gen5x4 and one PCIe Gen4x4, alongside four SATA3 ports. This allows for an extensive range of SSD and HDD configurations, catering to users who need high-speed storage solutions. The B650M-HDV's advanced storage options paired with its dual M.2 slots provide a clear edge for users focusing on high-performance storage setups.

Aesthetic and Design

Aesthetically, the ASRock B450M/AC R2.0 has a standard design, while the ASRock B650M-HDV M.2 White boasts a striking white PCB that appeals to users seeking a stylish build. The B650M-HDV's design integrates well into themed systems, making it a favored choice for those who value aesthetics alongside performance. While the B450M/AC R2.0 serves its purpose effectively, the B650M-HDV caters to a more design-conscious audience, enhancing the overall look of a PC build.

Audio and Networking

In terms of audio, the ASRock B450M/AC R2.0 offers HDMI output, while the B650M-HDV provides enhanced audio capabilities with a Realtek ALC897 7.1-channel codec, supported by Nahimic audio technology. Additionally, the B650M-HDV includes Realtek 2.5G LAN, ensuring faster networking speeds compared to standard Ethernet options. For gamers and media enthusiasts, the superior audio and networking features of the B650M-HDV deliver a more immersive experience, making it the more attractive option for those who prioritize sound and connectivity.

Which should you buy?

Choosing between the ASRock B450M/AC R2.0 and the ASRock B650M-HDV M.2 White ultimately depends on your specific needs and budget. If you are looking for a cost-effective solution for basic tasks and older Ryzen processors, the B450M/AC R2.0 at $79.00 is a reasonable choice. However, for those aiming for future-proof builds with the latest Ryzen processors, superior memory support, advanced connectivity, and enhanced aesthetics, the B650M-HDV at $99.99 represents a worthwhile investment. If performance and modern features are priorities, the B650M-HDV is the clear winner.