ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA vs ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz
Updated July 2026 — ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz leads on memory and price.
The ASRock B860 Pro RS outperforms the B450M/AC R2.0 in almost every aspect, making it the better choice for high-end users.
Why ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA is better
Price
B450M/AC R2.0 is significantly cheaper at $79.00.
AMD Support
Supports a wide range of AMD Ryzen processors.
Size
Micro ATX form factor is more compact.
Why ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz is better
Memory Speed
Supports DDR5 up to 8666 MHz.
Expansion Slots
Includes PCIe 5.0 x16 slot for next-gen GPUs.
Connectivity
Features Thunderbolt 4 and USB 3.2 Gen2x2 ports.
Overall score
Specifications
| Spec | ASRock B450M/AC R2.0 AM4 AMD Promontory B450 SATA | ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz |
|---|---|---|
| Processor Support | AMD AM4 | Intel LGA 1851 |
| Memory Type | DDR4 | DDR5 |
| PCIe Version | 3.0 | 5.0 |
| Audio Codec | Not specified | Realtek ALC1220 |
| Form Factor | Micro ATX | ATX |
Dimension comparison
Overview of the ASRock B450M/AC R2.0 and ASRock B860 Pro RS
The ASRock B450M/AC R2.0 is priced at $79.00, while the ASRock B860 Pro RS costs $129.99, making the latter about 64% more expensive. Designed for different processor families, the B450M/AC R2.0 caters to AMD Ryzen CPUs, while the B860 Pro RS targets Intel Core Ultra processors. This article will delve into their specifications, performance capabilities, and overall value to help you decide which motherboard best fits your needs.
Compatibility with Processors
In terms of processor compatibility, the ASRock B450M/AC R2.0 supports a range of AMD AM4 Socket Ryzen processors, including the 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series. This extensive compatibility allows users to upgrade within the AMD ecosystem easily. On the other hand, the ASRock B860 Pro RS is specifically designed for Intel's Core Ultra Series 2 processors, utilizing the LGA 1851 socket. This targeted compatibility ensures that Intel users can benefit from the latest technologies available in the Intel lineup.
Memory Support
Memory performance is another critical aspect where these two motherboards differ significantly. The B450M/AC R2.0 supports DDR4 memory up to 3200 MHz, which is decent for most gaming and productivity tasks. However, the B860 Pro RS excels with its support for DDR5 memory, reaching speeds up to an impressive 8666 MHz (overclocked). This substantial difference gives the B860 Pro RS a clear advantage when handling memory-intensive applications, making it suitable for high-end gaming and content creation.
Expansion Slots
When it comes to expansion capabilities, the B860 Pro RS clearly outshines the B450M/AC R2.0. The B450M/AC R2.0 offers one PCIe 3.0 x16 slot and one PCIe 2.0 x16 slot, which may limit future upgrade options. In contrast, the B860 Pro RS features a PCIe 5.0 x16 slot for next-gen GPUs and an additional PCIe 4.0 x16 slot, providing users with significantly more room for expansion. This advantage is crucial for gamers and professionals looking to maximize their system's performance and longevity.
Storage Options
Storage capabilities also set the two motherboards apart. The B450M/AC R2.0 supports standard SATA 6 Gb/s connections, which may suffice for basic use. However, the B860 Pro RS offers advanced storage options, including a Blazing M.2 (PCIe Gen5 x4) slot and multiple M.2 slots for high-speed storage solutions. These enhancements ensure faster data access and improved overall system responsiveness, making the B860 Pro RS a better option for users who require high storage performance.
Connectivity Features
Connectivity is an essential factor in modern motherboards, and the B860 Pro RS provides superior options compared to the B450M/AC R2.0. While the B450M/AC R2.0 has HDMI outputs for video, the B860 Pro RS includes both HDMI and DisplayPort options, catering to various display setups. Moreover, the B860 Pro RS incorporates Thunderbolt 4 Type-C and USB 3.2 Gen2x2 Type-C ports, enabling ultra-fast data transfers at 20 Gbps. This advanced connectivity is essential for users who rely on speed and efficiency, particularly in multimedia and gaming environments.
Audio Performance
Audio quality is another area where the B860 Pro RS has an edge. The B450M/AC R2.0 does not specify advanced audio features, while the B860 Pro RS boasts the Realtek ALC1220 7.1 CH HD Audio Codec with Nahimic Audio technology. This setup enhances audio performance for gaming and media consumption, making the B860 Pro RS a better choice for audiophiles and gamers seeking immersive sound experiences.
Build Quality and Design
Both motherboards come from ASRock and exhibit solid build quality. However, the B860 Pro RS is designed with military-grade components and features a Lite Release Design for easier GPU installation. This focus on durability and user-friendly assembly is particularly beneficial for those who frequently upgrade their systems or build custom PCs. The aesthetic appeal of the B860 Pro RS also aligns with modern gaming setups, while the B450M/AC R2.0 has a more straightforward design.
Which should you buy?
Ultimately, the decision between the ASRock B450M/AC R2.0 and the ASRock B860 Pro RS hinges on your specific needs and budget. If you are looking for a more budget-friendly option that supports AMD Ryzen processors, the B450M/AC R2.0 at $79.00 is a solid choice. However, for those seeking advanced features, higher memory speeds, better expansion capabilities, and superior connectivity, the B860 Pro RS at $129.99 is worth the investment. The significant differences in performance and future-proofing make the B860 Pro RS a more suitable option for gamers and power users.