ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz vs GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard,
Updated August 2026 — ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz wins on price and audio, GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, wins on power and storage.
The ASRock B860 Pro RS offers excellent value with high memory speed support, while the GIGABYTE Z790 UD AC excels in power design and thermal management.
Why ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz is better
Price
ASRock is $20 cheaper.
Memory Speed
Supports DDR5 up to 8666 MHz.
Audio Features
Includes Nahimic Audio for immersive sound.
Why GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, is better
Power Design
16+1+1 power phase for better efficiency.
Thermal Management
Includes fully covered MOSFET heatsinks.
Storage Options
Three PCIe 4.0 x4 M.2 slots for ample storage.
Overall score
Specifications
| Spec | ASRock B860 Pro RS Intel Core Ultra DDR5 8666 MHz | GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard, |
|---|---|---|
| Power Phases | 10+1+1+1+1 | 16+1+1 |
| Memory Support | DDR5 up to 8666 MHz | DDR5, max speed unspecified |
| M.2 Slots | 1 PCIe Gen5, 2 PCIe Gen4 | 3 PCIe 4.0 x4 |
| USB Ports | Multiple USB 3.2 and USB 2.0 | SuperSpeed USB 3.2 Gen 2x2 Type-C |
| Audio Codec | Realtek ALC1220 | Not specified |
Dimension comparison
Overview of the ASRock B860 Pro RS and GIGABYTE Z790 UD AC
The ASRock B860 Pro RS is priced at $129.99, while the GIGABYTE Z790 UD AC is listed at $149.99, making the ASRock about 17% cheaper. Both motherboards cater to different Intel processor generations and offer unique features aimed at gamers and content creators. This comparison will highlight their differences in power phases, memory support, connectivity, and overall value.
Power Design
When it comes to power design, the ASRock B860 Pro RS features a 10+1+1+1+1 power phase setup, while the GIGABYTE Z790 UD AC boasts a more robust 16+1+1 power phase configuration. The GIGABYTE's design includes a 60A DrMOS, offering potentially better power efficiency and stability for high-performance tasks. This distinction may make the GIGABYTE a more reliable choice for overclockers and users requiring a high degree of power management, especially during demanding workloads.
Memory Support
The ASRock B860 Pro RS supports DDR5 memory up to 8666 MHz with four DIMM slots, providing excellent potential for high-speed memory configurations. In contrast, the GIGABYTE Z790 UD AC also supports DDR5 but does not specify an exact maximum speed, though it supports dual-channel memory using four DIMMs. Both motherboards are well-equipped for memory-hungry applications, but the ASRock's higher maximum speed could appeal to enthusiasts looking to maximize their performance.
Storage Options
In terms of storage, the ASRock B860 Pro RS offers a BLAZING M.2 PCIe Gen5 x4 slot along with additional PCIe Gen4 slots. The GIGABYTE Z790 UD AC features three PCIe 4.0 x4 M.2 slots, providing ample options for high-speed NVMe storage. Both boards support PCIe 5.0, ensuring future-proofing for next-gen SSDs. However, the ASRock’s Gen5 support gives it a slight edge for those wanting the latest technology in storage solutions.
Connectivity
Connectivity options are critical for modern motherboards, and both options deliver. The ASRock B860 Pro RS includes Thunderbolt 4 Type-C, USB 3.2 Gen2x2 Type-C, and a comprehensive array of USB ports, including USB 3.2 and USB 2.0. Meanwhile, the GIGABYTE Z790 UD AC offers SuperSpeed USB 3.2 Gen 2x2 Type-C alongside its array of USB ports. Although both motherboards provide excellent connectivity, the ASRock's inclusion of Thunderbolt 4 may be more appealing to users looking for high-speed peripherals and data transfer capabilities.
Audio Features
Audio quality is often overlooked but is essential for many users. The ASRock B860 Pro RS features the Realtek ALC1220 7.1 CH HD Audio Codec with Nahimic Audio, providing immersive sound quality. On the other hand, the GIGABYTE Z790 UD AC does not specify its audio capabilities in detail, making it challenging to assess its audio performance against the ASRock. For audiophiles or gamers who prioritize sound, the ASRock's explicit audio features may offer a decisive advantage.
Build Quality and Aesthetics
Both motherboards are designed with durability in mind. The ASRock B860 Pro RS incorporates military-grade components and a Lite Release Design for easier GPU installation, enhancing its build quality. The GIGABYTE Z790 UD AC features a fully covered MOSFET heatsink and ultra-durable armor, which contributes to its robust construction. While both motherboards are built to last, the ASRock's design considerations may resonate more with those who appreciate practical features alongside aesthetics.
Price and Value
The ASRock B860 Pro RS is currently priced at $129.99, while the GIGABYTE Z790 UD AC is priced at $149.99. The difference of $20 reflects a roughly 17% price increase for the GIGABYTE. For users on a budget, the ASRock presents a more cost-effective option, especially considering the features it offers. However, those willing to invest a little more may find the GIGABYTE's additional features, such as its superior power design and thermal management, worth the extra cost.
Which should you buy?
Choosing between the ASRock B860 Pro RS and the GIGABYTE Z790 UD AC ultimately depends on your specific needs. If you're looking for excellent value, high memory speed support, and robust connectivity, the ASRock B860 Pro RS is a stellar option at $129.99. However, if you prioritize power design, thermal management, and future-proofing with ample storage options, the GIGABYTE Z790 UD AC, despite its higher price of $149.99, may be the better choice for serious gamers and enthusiasts.