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ASRock · AM5 · B850

ASRock AMD B850 Steel Legend WiFi 7

ATX · DDR5 · 4 DIMMs · 14-phase VRM · 7

Quality
76
VRM
54
Value
85
Amazon
$170
ASRock AMD B850 Steel Legend WiFi 7
View ASRock AMD B850 Steel Legend WiFi 7 Gallery in high resolution
$170
Available Updated 3 days, 9 hours ago Prime FBA
Overall75.8
VRM54.0
Chipset73.0
Expansion / storage78.0
Connectivity78.0
Audio96.0
Quality / price84.7
$170 on Amazon Motherboard table Compare this motherboard

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Written analysis

ASRock AMD B850 Steel Legend WiFi 7 at a glance

The ASRock AMD B850 Steel Legend WiFi 7 uses the ATX form factor, AM5 socket, and B850 chipset. This is a balanced mainstream platform: enough expansion and connectivity for a performance PC without paying only for flagship extras.

Memory support is DDR5 across 4 DIMM slots, with up to 256 GB and rated overclocked speeds up to 8000 MT/s. ECC modules are accepted, subject to CPU support. XMP / EXPO memory-profile support is recorded for easier tuning.

Best fit: a performance gaming and productivity PC that needs a balanced board without workstation-class excess.

Power delivery

The calculated VRM score is 54.0, placing the power delivery in the mid-range class. The board lists 14 CPU power phases, 80 A power stages in a 14+2+1 layout. CPU power input is listed as 2. It is a sensible match for mainstream processors, with conservative tuning on higher-power chips.

Expansion and storage

The expansion and storage score is 78.0: well equipped . The platform supports PCIe 5.0. Physical expansion includes 2 ×16 slots.

On-board storage consists of 4 M.2 slots supporting Supports PCIe 5.0 x4 and PCIe 4.0 x4 modes. and 4 SATA ports. Supported M.2 lengths are listed as 2230, 2260, 2280. That is enough NVMe capacity for a multi-drive gaming or creator setup without immediately relying on an add-in card.

Connectivity and rear I/O

The connectivity score is 78.0, rated strong . Wireless networking is Wi-Fi 7 ; wired networking is 2.5 Gigabit LAN 10/100/1000/2500 Mb/s at up to 2500 Mbps. Bluetooth 5.4 is included. The recorded USB provision is 11 rear connections and 9 front-panel connections. The specification sheet below separates every USB speed and connector type.

Display connectivity includes HDMI 2.1. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 96.0. This is an ultra-premium onboard implementation based on Realtek ALC4082, aimed at users who want strong analogue output without immediately adding a USB DAC. The rear panel has 2 analogue jacks, with gold-plated contacts. Optical S/PDIF is present for digital audio equipment.

Buying verdict

Overall quality is 75.80, a strong performance-class result. This is the practical sweet spot for a powerful gaming or productivity PC without paying for every flagship extra.

At the recorded Amazon price, the quality-to-price score is 84.7—an excellent value relative to the other boards in the catalog.

Board data

Full specifications

Platform, expansion, storage, rear I/O, internal headers, networking, audio, and board controls in one sheet.

General

Manufacturer
ASRock
Motherboard
ASRock AMD B850 Steel Legend WiFi 7
Chipset / socket
B850 / AM5
Form factor
ATX
Launch price
—
Amazon price
$170
Availability
In stock
Price updated
3 days, 9 hours ago

VRM

CPU phases
14 (80 A)
Power design
14+2+1
EPS connector
2

Memory

Type / slots
DDR5 / 4 DIMMs
Max capacity / OC
256 GB / 8000 MT/s
Per DIMM
64 GB
XMP / EXPO
Yes
ECC
Modules supported

PCIe

Supported version
PCIe 5.0
x16 physical
2
x16 Gen 5
1
x16 Gen 4
1

Storage

M.2 slots
4
M.2 lengths
2230, 2260, 2280
M.2 modes
Supports PCIe 5.0 x4 and PCIe 4.0 x4 modes.
SATA ports
4

Display outputs

HDMI
Yes · 2.1 · 4K 120Hz
DisplayPort
No
USB-C DisplayPort
No

USB

Rear USB 2.0
4
Rear USB 3.2 Gen 1 Type-A 5 Gbps
3
Rear USB 3.2 Gen 2 Type-A 10 Gbps
2
Rear USB 3.2 Gen 2 Type-C 10 Gbps
2
Front USB 2.0
4
Front USB 3.2 Gen 1 Type-A 5 Gbps
4
Front USB 3.2 Gen 2×2 Type-C 20 Gbps
1
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
4
Header USB 3.2 Gen 2×2 Type-C 20 Gbps
1

Networking

Ethernet
2.5 Gigabit LAN 10/100/1000/2500 Mb/s
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
7
Wi-Fi bandwidth
160MHz
Bands
2.4GHz/5GHz/6GHz
Antenna connectors
2
Bluetooth
5.4

Audio

Chipset
Realtek ALC4082
Analog jacks
2
Gold-plated jacks
Yes
Optical S/PDIF
Yes
Spatial audio
Rear output

Buttons

BIOS flashback
Yes
Clear CMOS
No
Q-Flash Plus
No
Smart button
No
Onboard start / reset
No

Additional information

Memory notes
Supports un-buffered DDR5 memory. In addition to XMP, it also supports EXTended Profiles for Overclocking (EXPO) memory modules.
Display notes
Features Integrated AMD RDNA™ graphics, but actual support may vary by CPU. The HDMI port is TMDS/FRL 8G Compatible and supports HDR and HDCP 2.3.
Expansion notes
The first PCIe x16 slot (PCIE1) is PCIe 5.0 and supports x16 mode. The second PCIe x16 slot (PCIE2) is PCIe 4.0 and supports x4 mode. The primary VGA slot (PCIE1) features 15μ Gold Contact.
M2_1
5.0 4 · 2280 · CPU
M2_2
4.0 4 · 2260, 2280 · CPU
M2_3
4.0 4 · 2230, 2260, 2280 · Chipset
M2_4
4.0 4 · 2260, 2280 · Chipset
Storage notes
The 4 SATA3 6.0 Gb/s connectors are provided by an ASMedia ASM1061 controller. The M.2 slot descriptions include an asterisk (*), but no corresponding note is provided in the text to explain its meaning.
USB notes
USB ports are provided by both the CPU and the Chipset.
Audio notes
7.1 CH HD Audio with Content Protection. Individual PCB Layers for R/L Audio Channel. Direct Drive Technology on Front headphone port (Supports up to 600 Ohm headsets). Nahimic Audio.
Networking notes
802.11be 2x2 Wi-Fi 7 Module. Supports IEEE 802.11a/b/g/n/ac/ax/axe/be. 1 antenna to support 2 (Transmit) x 2 (Receive) diversity technology. Supports MU-MIMO.
Fan / RGB headers
2 CPU · — OPT · 1 AIO · 3 chassis · 3 ARGB · 1 RGB
Thermal sensors
1
Other headers
Front audio · System panel · TPM
Dimensions
30.5 cm x 24.4 cm

Extracted notes sit here. Official manufacturer copy is at the bottom of the page.

Amazon

Price history

Nearby quality

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VRM fit

VRM-appropriate CPUs

AM5 processors whose TDP sits in this board’s VRM window. Socket match is required; chipset extras still matter on sTR5. This is a power-delivery filter, not a ranked CPU guide.

Open AM5 CPUs in the CPU table

Discussion

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Vendor copy

Official manufacturer data

Raw manufacturer text kept for reference. Structured specs above are extracted from this copy and are the source for scores and tables.

Memory

- Dual Channel DDR5 Memory Technology
- 4 x DDR5 DIMM Slots
- Supports DDR5 ECC/non-ECC, un-buffered memory up to 8000+(OC)
- Max. capacity of system memory: 256GB
- Supports Extreme Memory Profile (XMP) and EXTended Profiles for Overclocking (EXPO) memory modules

Graphics

Integrated AMD RDNA™ graphics (Actual support may vary by CPU)
- 1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR, HDCP 2.3 and max. resolution up to 4K 120Hz

Expansion slots

CPU:
- 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
Chipset:
- 1 x PCIe 4.0 x16 Slot (PCIE2), supports x4 mode*
- 1 x Vertical M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module
- 15μ Gold Contact in VGA PCIe Slot (PCIE1)

Storage

CPU:
- 1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5x4 (128 Gb/s) mode*
- 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode*
Chipset:
- 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2230/2260/2280 PCIe Gen4x4 (64 Gb/s) mode*
- 1 x Hyper M.2 Socket (M2_4, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode*
ASMedia ASM1061:
- 4 x SATA3 6.0 Gb/s Connectors

USB

CPU:
- 2 x USB 3.2 Gen2 Type-C (Rear)
- 1 x USB 3.2 Gen2 Type-A (Rear (USB32_3))
- 1 x USB 3.2 Gen1 Type-A (Rear (USB32_1))
Chipset:
- 1 x USB 3.2 Gen2x2 Type-C (Front)
- 1 x USB 3.2 Gen2 Type-A (Rear (USB32_4))
- 6 x USB 3.2 Gen1 Type-A (2 Rear (USB32_2 and USB32_5), 4 Front)
- 8 x USB 2.0 (4 Rear, 4 Front)

Internal I/O

- 1 x SPI TPM Header
- 1 x Thermistor Cable Header
- 1 x Power LED and Speaker Header
- 1 x RGB LED Header*
- 3 x Addressable LED Headers**
- 2 x CPU Fan Connectors (4-pin) (Smart Fan Speed Control)***
- 3 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control)***
- 1 x AIO Pump Fan Connector (4-pin) (Smart Fan Speed Control)***
- 1 x 24 pin ATX Power Connector (Hi-Density Power Connector)
- 2 x 8 pin 12V Power Connectors (Hi-Density Power Connector)
- 1 x Front Panel Audio Connector
- 2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
- 2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
- 1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)

Rear I/O

- 2 x Antenna Ports
- 1 x HDMI Port
- 1 x Optical SPDIF Out Port
- 2 x USB 3.2 Gen2 Type-C Ports (10 Gb/s)
- 3 x USB 3.2 Gen1 Type-A Ports*
- 2 x USB 3.2 Gen2 Type-A Ports (10 Gb/s)**
- 4 x USB 2.0 Ports
- 1 x RJ-45 LAN Port
- 1 x BIOS Flashback Button
- 1 x Line Out Jack (Gold Audio Jack)
- 1 x Microphone Input Jack (Gold Audio Jack)

Wireless

- 802.11be 2x2 Wi-Fi 7 Module
- Supports IEEE 802.11a/b/g/n/ac/ax/axe/be
- Supports 2.4GHz/5GHz/6GHz* frequency band
- Supports 160MHz channel bandwidth with 6GHz* frequency band
- 1 antenna to support 2 (Transmit) x 2 (Receive) diversity technology
- Supports Bluetooth 5.4
- Supports MU-MIMO

Audio

- 7.1 CH HD Audio with Content Protection (Realtek ALC4082 Audio Codec)
- Individual PCB Layers for R/L Audio Channel
- Direct Drive Technology on Front headphone port (Supports up to 600 Ohm headsets)
- Nahimic Audio

Special features

Software
- ASRock Motherboard Utility (A-Tuning)
- ASRock Dragon 2.5G LAN Software
- ASRock Polychrome SYNC*
UEFI
- ASRock EZ Mode
- ASRock Full HD UEFI
- ASRock Auto Driver Installer
- ASRock Instant Flash *These utilities can be downloaded from ASRock Live Update & APP Shop.

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