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GIGABYTE A620I AX vs GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX

Updated August 2026 — GIGABYTE A620I AX wins on size, GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX wins on memory and connectivity.

The GIGABYTE B850M Gaming X offers superior performance and expandability compared to the A620I AX. However, the A620I AX is a more budget-friendly option for compact builds.

Why GIGABYTE A620I AX is better

Price

A620I AX is $40 cheaper

Size

A620I AX is Mini-ITX for compact builds

Warranty

Both have a 5-year warranty

Why GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX is better

Power Phases

B850M has 10+2+2 vs A620I's 5+2+1

Memory Slots

B850M supports 4 DIMMs vs A620I's 2

Connectivity

B850M has PCIe 5.0 and 2 M.2 slots

Overall score

GIGABYTE A620I AX
75
GIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX
85

Specifications

SpecGIGABYTE A620I AXGIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX
Power Phases5+2+110+2+2
Memory Slots2 DIMMs4 DIMMs
PCIe Version4.05.0
M.2 Slots12
NetworkingWi-Fi 6EWi-Fi 6E

Dimension comparison

GIGABYTE A620I AXGIGABYTE B850M Gaming X WIFI6E AMD AM5 mATX

Overview of GIGABYTE A620I AX and GIGABYTE B850M Gaming X

The GIGABYTE A620I AX is priced at $109.99, while the GIGABYTE B850M Gaming X is available for $149.91, making the A620I AX about 27% cheaper. Both motherboards are designed to support AMD's AM5 processors, but they cater to different user needs and configurations. The A620I AX is a Mini-ITX motherboard ideal for compact builds, while the B850M Gaming X is an mATX motherboard that offers more expansion options.

Performance Capabilities

In terms of performance, the GIGABYTE B850M Gaming X excels with its 10+2+2 power phase design, compared to the A620I AX's 5+2+1 phases. This difference indicates that the B850M Gaming X can potentially offer better power management and stability, especially under load. Both motherboards support the latest AMD Ryzen processors, but the B850M's advanced power design is tailored for higher-end CPUs, providing an edge for gamers and performance enthusiasts.

Memory Support

The GIGABYTE A620I AX supports dual-channel DDR5 memory with 2 slots, while the B850M Gaming X supports up to 4 DIMMs. This translates to greater memory capacity and potential speed for the B850M, making it more suitable for users who require extensive multitasking or high-performance applications. The ability of the B850M to handle more memory can significantly enhance overall system performance in demanding scenarios.

Connectivity Options

When it comes to connectivity, the GIGABYTE B850M Gaming X has an advantage with PCIe 5.0 support and two M.2 slots, compared to the A620I AX's single M.2 slot and PCIe 4.0. The inclusion of PCIe 5.0 on the B850M allows for faster data transfer rates, which is crucial for high-speed SSDs. Additionally, both motherboards feature USB 3.2 Gen1 Type-C, but the B850M offers more versatility with its additional slots and modern interface support.

Networking Features

Both the GIGABYTE A620I AX and B850M Gaming X offer advanced networking options, featuring Wi-Fi 6E and 2.5GbE LAN. However, the A620I AX focuses on a compact design while still providing excellent connectivity, making it suitable for smaller builds. The B850M, with its enhanced power design and thermal management, is better equipped for gaming scenarios that demand stable and fast internet connections.

Build Quality and Design

The build quality of both motherboards is robust, featuring durable components designed to withstand heat and usage. The GIGABYTE A620I AX comes with an EZ-Latch PCIe x16 slot that allows for quick installation and removal of GPU, which is a handy feature for those frequently upgrading their systems. Meanwhile, the B850M Gaming X includes fully covered MOSFET heatsinks, enhancing thermal performance and ensuring stability during intensive tasks. Both motherboards come with a 5-year warranty, signaling confidence in their durability.

Target Audience

The GIGABYTE A620I AX is aimed at users who prefer compact builds and are looking for a cost-effective solution with solid performance for general use and light gaming. In contrast, the GIGABYTE B850M Gaming X targets gamers and power users who need more expandability, better power management, and higher performance capabilities. The choice ultimately comes down to the user's specific needs and the type of system they wish to build.

Which should you buy?

Choosing between the GIGABYTE A620I AX and the GIGABYTE B850M Gaming X largely depends on your requirements. If budget is a major concern and you're looking for a compact solution, the A620I AX at $109.99 is an excellent choice. However, for those who prioritize performance and expandability, the B850M Gaming X, priced at $149.91, offers superior features that justify the higher cost. Ultimately, if you need a motherboard capable of handling more demanding tasks and future upgrades, the B850M is the way to go.