MSI

MSI PRO A620M-B

Chipset:: A620
Socket:: AM5
Form Factor:: Micro-ATX
Memory:: 2x DDR5-6800 (OC)

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Manufacturer: MSI Last updated: September 11, 2026

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MSI PRO A620M-B Review

The PRO A620M-B is MSI's updated entry-level AM5 board, extending official CPU support through Ryzen 9000-series chips and pushing memory overclock ceilings slightly higher than its A620M-E predecessor.

MSI does not officially disclose an exact phase count or amperage figure for this board's VRM; CPU overclocking remains unsupported on A620 regardless of the specific board revision. Two DDR5 DIMM slots run in dual-channel mode, with MSI's Memory Boost feature enabling overclocked speeds of 6800 MT/s and above, a modest improvement over the A620M-E's rated ceiling. A single PCIe 4.0 x16 slot handles the GPU, and one PCIe 4.0 M.2 slot covers primary storage, matching the A620M-E's storage configuration. Gigabit Ethernet handles wired networking without a factory Wi-Fi module. The exact audio codec model is not disclosed by MSI for this SKU. Against the MSI PRO A620M-E in this catalog, the A620M-B's primary advantages are its updated Ryzen 9000 CPU support list and a slightly higher memory OC ceiling, making it the more future-proof of MSI's two A620 boards.

Power Delivery and VRM Design

MSI does not officially disclose an exact phase count or amperage figure for this board's VRM; CPU overclocking remains unsupported on A620 regardless of the specific board revision.

Memory Support

Two DDR5 DIMM slots run in dual-channel mode, with MSI's Memory Boost feature enabling overclocked speeds of 6800 MT/s and above, a modest improvement over the A620M-E's rated ceiling.

Expansion and Storage

A single PCIe 4.0 x16 slot handles the GPU, and one PCIe 4.0 M.2 slot covers primary storage, matching the A620M-E's storage configuration.

Connectivity

Gigabit Ethernet handles wired networking without a factory Wi-Fi module. The exact audio codec model is not disclosed by MSI for this SKU.

Comparison to Alternatives

Against the MSI PRO A620M-E in this catalog, the A620M-B's primary advantages are its updated Ryzen 9000 CPU support list and a slightly higher memory OC ceiling, making it the more future-proof of MSI's two A620 boards.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

New Ryzen 9000 builds wanting the most current A620 board in MSI's lineup
Budget builders chasing the highest memory OC ceiling among entry-level A620 boards

Not for

Buyers who already own the A620M-E and don't need the marginal CPU support update
Anyone needing factory Wi-Fi or a second M.2 slot

Specifications

What these specs mean

Identity

Model Number	PRO A620M-B
Form Factor	Micro-ATX

Platform and CPU compatibility

Platform	AMD
Socket	AM5
Chipset	A620
Newest CPU Family Supported	Ryzen 9000
Oldest CPU Family Supported	Ryzen 7000

Memory

Memory Type	DDR5
Memory Slots	2
Max Memory	128 GB
Memory Channels	2
Max Memory Capacity	128 GB
Max Rated Memory Speed	6800 MT/s
ECC Memory Support	None

Expansion & Connectivity

M.2 Slots	1
PCIe 5.0 Support	No
Wi-Fi Onboard	No

Physical fit

Board Width	215 mm

M.2 storage

M.2 Slots Onboard	1
M.2 PCIe 4.0 Slots	1
M.2 CPU Attached Slots	1

Other storage

SATA Ports	4

PCIe expansion

PCIe x16 Slots	1
Primary Graphics Slot Gen	PCIe 4.0

Rear USB

Rear USB 5Gbps Ports	4
Rear USB 2.0 Ports	2

Internal headers

Front USB-C Header Speed	None
Fan and Pump Headers	3
ARGB Headers	1

Power delivery

Vcore Power Stages	Not officially disclosed by MSI

Builder features

POST Code Display	No

Network and audio

Max Ethernet Speed	2.5 Gbps
Ethernet Port Count	1
Wi-Fi Standard	None
Audio Codec	Realtek ALC897, 7.1-channel

FAQs

What are the key specifications of the MSI PRO A620M-B (AM5/AMD A620/mATX/DDR5-6800+ OC/Updated CPU Support)?

Key specs for the MSI PRO A620M-B: Chipset A620, Socket AM5, Socket Type AM5, Max Memory 128 GB, Max Memory Capacity 128 GB, Form Factor Micro-ATX.

Will the MSI PRO A620M-B (AM5/AMD A620/mATX/DDR5-6800+ OC/Updated CPU Support) work with my current setup?

The MSI PRO A620M-B (AM5/AMD A620/mATX/DDR5-6800+ OC/Updated CPU Support) lists Socket is AM5. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the MSI PRO A620M-B (AM5/AMD A620/mATX/DDR5-6800+ OC/Updated CPU Support) best suited to?

Best suited to: New Ryzen 9000 builds wanting the most current A620 board in MSI's lineup; Budget builders chasing the highest memory OC ceiling among entry-level A620 boards.

What are the drawbacks of the MSI PRO A620M-B (AM5/AMD A620/mATX/DDR5-6800+ OC/Updated CPU Support)?

Not the best fit for: Buyers who already own the A620M-E and don't need the marginal CPU support update; Anyone needing factory Wi-Fi or a second M.2 slot.