ASRock B850M Pro-A
ASRock B850M Steel Legend WiFi

ASRock B850M Pro-A ASRock B850M Steel Legend WiFi

Overview

Welcome to our detailed specification comparison between the ASRock B850M Pro-A and the ASRock B850M Steel Legend WiFi. Both are Micro-ATX motherboards built on the AM5 platform with the B850 chipset, sharing a remarkably similar foundation in memory capacity, storage options, and connectivity. Yet there are a few targeted differences worth examining closely, particularly around wireless connectivity and aesthetic features, that could make one a better fit for your specific build.

Common Features

  • Both boards use the AM5 CPU socket.
  • Both boards are built on the B850 chipset.
  • Both boards use the Micro-ATX form factor.
  • Both boards support HDMI 2.1.
  • Overclocking is supported on both boards.
  • Neither board offers easy BIOS reset.
  • Both boards feature dual BIOS.
  • Both boards have a single CPU socket.
  • Both boards support up to 256GB of maximum memory.
  • Both boards support a maximum RAM speed of 8000 MHz.
  • Both boards use DDR5 memory.
  • Both boards have 4 memory slots and support dual-channel memory.
  • ECC memory is not supported on either board.
  • Both boards provide 1 USB 3.2 Gen 2 Type-A port, 2 USB 3.2 Gen 1 Type-A ports, 1 USB 3.2 Gen 2 Type-C port, and 4 USB 2.0 ports on the rear.
  • Neither board includes USB 3.2 Gen 2x2, USB 4 20Gbps, or USB 4 40Gbps ports.
  • Both boards have 4 SATA 3 connectors, 3 M.2 sockets, and 5 fan headers.
  • Both boards include a TPM connector.
  • Both boards offer 4 USB 3.2 Gen 1 ports and 4 USB 2.0 ports through expansion headers.
  • Both boards feature 1 PCIe 5.0 x16 slot and 1 PCIe x4 slot, with no PCIe 4.0, 3.0, 2.0, x1, or x8 slots.
  • Both boards deliver 7.1-channel audio with 3 audio connectors, and neither includes an S/PDIF Out port.
  • Both boards support RAID 0, RAID 1, and RAID 10, while neither supports RAID 5 or RAID 0+1.

Main Differences

  • Wi-Fi support is present on the ASRock B850M Steel Legend WiFi but not available on the ASRock B850M Pro-A.
  • Bluetooth is available on the ASRock B850M Steel Legend WiFi but not on the ASRock B850M Pro-A.
  • RGB lighting is featured on the ASRock B850M Steel Legend WiFi but is absent on the ASRock B850M Pro-A.
Specs Comparison
ASRock B850M Pro-A

ASRock B850M Pro-A

ASRock B850M Steel Legend WiFi

ASRock B850M Steel Legend WiFi

General info:
CPU socket AM5 AM5
chipset B850 B850
form factor Micro-ATX Micro-ATX
release date January 2025 January 2025
supports Wi-Fi
Has Bluetooth
HDMI version HDMI 2.1 HDMI 2.1
Easy to overclock
has RGB lighting
Easy to reset BIOS
Has dual BIOS
CPU sockets 1 1
Has integrated graphics
warranty period 3 years 3 years
height 244 mm 244 mm
width 244 mm 244 mm
Has integrated CPU

Both the ASRock B850M Pro-A and the ASRock B850M Steel Legend WiFi share the same fundamental platform: an AM5 socket on a B850 chipset, housed in an identical Micro-ATX form factor at exactly 244 × 244 mm. This means they target the same case sizes, support the same current-generation AMD processors, and offer the same overclocking headroom courtesy of the B850 chipset. Both also include dual BIOS — a meaningful safety net that lets users recover from a failed firmware flash without additional hardware — and carry an identical 3-year warranty. For core platform capability, they are evenly matched.

The divergence lies entirely in connectivity and aesthetics. The Steel Legend WiFi integrates Wi-Fi and Bluetooth, which the Pro-A completely omits. In practical terms, this matters most in builds where routing an Ethernet cable is inconvenient, or where wireless peripherals and audio devices rely on Bluetooth pairing — both increasingly common in compact desktop setups. The Steel Legend WiFi also adds RGB lighting, which has no performance impact but is a deliberate lifestyle choice relevant to windowed-panel builds. The Pro-A, by contrast, is a purely utilitarian board that assumes a wired network environment and has no interest in illumination.

For users who already have a wired network and no need for Bluetooth, the Pro-A is the leaner, no-frills choice with no functional compromise. However, the Steel Legend WiFi holds a clear general-purpose edge: its built-in wireless connectivity removes the need for an add-in Wi-Fi card, preserving a PCIe slot and simplifying the build — making it the stronger recommendation for most users unless cost or a strict wired-only requirement pushes them toward the Pro-A.

Memory:
maximum memory amount 256GB 256GB
RAM speed (max) 8000 MHz 8000 MHz
overclocked RAM speed 8000 MHz 8000 MHz
memory slots 4 4
DDR memory version 5 5
memory channels 2 2
Supports ECC memory

Both the ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi offer the same memory specifications. They each support a maximum memory amount of 256GB, feature 4 memory slots, and support DDR5 memory. Both motherboards are equipped with dual memory channels and have the same maximum and overclocked RAM speeds of 8000 MHz.

Neither motherboard supports ECC memory, which is consistent across both models. These identical memory specifications ensure that users can expect similar memory performance and upgrade potential from either product.

In summary, there are no differences between the two models in terms of memory capabilities, as all key memory specifications are matched across both the B850M Pro-A and the B850M Steel Legend WiFi.

Ports:
USB 3.2 Gen 2 ports (USB-A) 1 1
USB 3.2 Gen 1 ports (USB-A) 2 2
USB 3.2 Gen 2 ports (USB-C) 1 1
USB 3.2 Gen 1 ports (USB-C) 0 0
USB 2.0 ports 4 4
USB 3.2 Gen 2x2 ports 0 0
USB 4 40Gbps ports 0 0
USB 4 20Gbps ports 0 0
Thunderbolt 4 ports 0 0
Thunderbolt 3 ports 0 0
has an HDMI output
DisplayPort outputs 1 1
RJ45 ports 1 1
Has USB Type-C
eSATA ports 0 0
DVI outputs 0 0
has a VGA connector
PS/2 ports 0 0

The ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi are identical when it comes to their port configurations. Both motherboards offer 1 USB 3.2 Gen 2 port (USB-A), 2 USB 3.2 Gen 1 ports (USB-A), and 1 USB 3.2 Gen 2 port (USB-C). They also provide 4 USB 2.0 ports and have USB Type-C support. Additionally, both models feature 1 HDMI output, 1 DisplayPort output, and 1 RJ45 port for networking.

Both boards lack USB 3.2 Gen 2x2 ports, USB 4 40Gbps ports, Thunderbolt 3 or 4 ports, and eSATA ports. Neither has DVI outputs or a VGA connector. Additionally, both motherboards do not include PS/2 ports.

Overall, the port offerings are identical across both products, providing the same connectivity options without any notable differences between the ASRock B850M Pro-A and the ASRock B850M Steel Legend WiFi in this category.

Connectors:
USB 3.2 Gen 1 ports (through expansion) 4 4
USB 2.0 ports (through expansion) 4 4
SATA 3 connectors 4 4
fan headers 5 5
USB 3.0 ports (through expansion) 4 4
M.2 sockets 3 3
Has TPM connector
U.2 sockets 0 0
Has mSATA connector
SATA 2 connectors 0 0

The ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi have identical connector specifications. Both motherboards feature 4 USB 3.2 Gen 1 ports, 4 USB 2.0 ports, and 4 USB 3.0 ports through expansion. Each model also includes 4 SATA 3 connectors, 3 M.2 sockets, and 5 fan headers. Additionally, both motherboards have a TPM connector and lack any U.2 sockets or mSATA connectors. Neither product includes SATA 2 connectors.

Given that all these key specifications match exactly between the two models, there is no difference in the connectors provided by the ASRock B850M Pro-A and the ASRock B850M Steel Legend WiFi.

In summary, both motherboards offer the same set of expansion and connectivity options in this category, with no notable differences between them.

Expansion slots:
PCIe 4.0 x16 slots 0 0
PCIe 5.0 x16 slots 1 1
PCIe 3.0 x16 slots 0 0
PCIe x1 slots 0 0
PCI slots 0 0
PCIe 2.0 x16 slots 0 0
PCIe x4 slots 1 1
PCIe x8 slots 0 0

The ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi are identical in terms of their expansion slot configuration. Both motherboards feature 1 PCIe 5.0 x16 slot and 1 PCIe x4 slot. Neither motherboard includes PCIe 4.0 x16 slots, PCIe 3.0 x16 slots, PCIe x1 slots, or PCI slots. Both boards also lack PCIe 2.0 x16 slots and PCIe x8 slots.

With these identical expansion slot configurations, users can expect the same expansion options and limitations from either the ASRock B850M Pro-A or the ASRock B850M Steel Legend WiFi.

In summary, there are no differences between the two models in the expansion slots category, as both offer the same setup of slots for add-in cards.

Audio:
audio channels 7.1 7.1
Has S/PDIF Out port
audio connectors 3 3

Both the ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi feature the same audio specifications. Each motherboard supports 7.1 audio channels and includes 3 audio connectors. Neither model includes an S/PDIF Out port, which is consistent across both products.

As both motherboards share identical audio capabilities, there are no differences in this category.

In summary, users can expect the same audio performance and connectivity options from both the ASRock B850M Pro-A and the ASRock B850M Steel Legend WiFi.

Storage:
Supports RAID 1
Supports RAID 10 (1+0)
Supports RAID 5
Supports RAID 0
Supports RAID 0+1

Both the ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi offer the same storage RAID support. They both support RAID 1, RAID 10 (1+0), and RAID 0. However, neither motherboard supports RAID 5 or RAID 0+1.

Since the storage capabilities related to RAID are identical between the two models, users can expect the same RAID options from either motherboard.

In summary, there are no differences between the ASRock B850M Pro-A and ASRock B850M Steel Legend WiFi in terms of storage RAID support.

Comparison Summary & Verdict

After comparing every specification, it is clear that the ASRock B850M Pro-A and the ASRock B850M Steel Legend WiFi are closely matched boards sharing the same AM5 socket, B850 chipset, DDR5 memory support up to 256GB, identical port layouts, and the same storage and expansion capabilities. The distinction comes down to three features: the Steel Legend WiFi adds built-in Wi-Fi, Bluetooth, and RGB lighting. Choose the ASRock B850M Pro-A if you want a no-frills, cost-conscious board and plan to handle networking via a wired Ethernet connection. Opt for the ASRock B850M Steel Legend WiFi if wireless connectivity is essential to your setup or if you want RGB aesthetics to complement a styled build.

ASRock B850M Pro-A
Buy ASRock B850M Pro-A if...

Choose the ASRock B850M Pro-A if you rely on a wired network connection and have no need for wireless features or RGB lighting, making it a straightforward and focused B850 platform build.

ASRock B850M Steel Legend WiFi
Buy ASRock B850M Steel Legend WiFi if...

Choose the ASRock B850M Steel Legend WiFi if built-in Wi-Fi and Bluetooth are important for your setup, or if you want RGB lighting to enhance the look of your build.