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ASUS · AM5 · B850

ASUS ROG Strix B850-A Gaming WiFi

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

Quality
79
VRM
60
Value
66
Amazon
$230
ASUS ROG Strix B850-A Gaming WiFi
View ASUS ROG Strix B850-A Gaming WiFi Gallery in high resolution
$230
Available Updated 3 days, 8 hours ago Prime FBA
Overall79.4
VRM60.0
Chipset89.0
Expansion / storage81.0
Connectivity79.0
Audio88.0
Quality / price65.7
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Written analysis

ASUS ROG Strix B850-A Gaming WiFi at a glance

The ASUS ROG Strix B850-A Gaming WiFi uses the ATX form factor, AM5 socket, and B850-A 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. The board can operate memory in ECC mode. 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 60.0, placing the power delivery in the upper mid-range class. The board lists 14 CPU power phases, 80 A power stages in a 14+2+2 layout. CPU power input is listed as 2. It suits performance processors at stock; sustained extreme overclocking is not its main purpose.

Expansion and storage

The expansion and storage score is 81.0: well equipped . The platform supports PCIe 5.0. Physical expansion includes 2 ×16 slots.

On-board storage consists of 4 M.2 slots supporting PCIe 5.0 x4, PCIe 4.0 x4, PCIe 4.0 x2 and 2 SATA ports. Supported M.2 lengths are listed as 22110, 2280, 2260, 2242. 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 79.0, rated strong . Wireless networking is Wi-Fi 7 ; wired networking is Intel® 2.5Gb Ethernet at up to 2500 Mbps. Bluetooth 5.4 is included. The recorded USB provision is 10 rear connections and 1 front-panel connections. The specification sheet below separates every USB speed and connector type.

Display connectivity includes HDMI 2.1, DisplayPort 1.4. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 88.0. This is a high-end onboard implementation using ROG SupremeFX ALC4080, Savitech SV3H712 AMP, suitable for good headsets, powered speakers, and everyday content work. The rear panel has 2 analogue jacks. Optical S/PDIF is present for digital audio equipment.

Buying verdict

Overall quality is 79.40, 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 65.7—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
ASUS
Motherboard
ASUS ROG Strix B850-A Gaming WiFi
Chipset / socket
B850-A / AM5
Form factor
ATX
Launch price
—
Amazon price
$230
Availability
In stock
Price updated
3 days, 8 hours ago

VRM

CPU phases
14 (80 A)
Power design
14+2+2
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
Operates in ECC mode

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
22110, 2280, 2260, 2242
M.2 modes
PCIe 5.0 x4, PCIe 4.0 x4, PCIe 4.0 x2
SATA ports
2

Display outputs

HDMI
Yes · 2.1 · 4K@60Hz
DisplayPort
Yes · 1.4 · 8K@30Hz
USB-C DisplayPort
No

USB

Rear USB 2.0
2
Rear USB 3.2 Gen 1 Type-A 5 Gbps
4
Rear USB 3.2 Gen 2 Type-A 10 Gbps
2
Rear USB 3.2 Gen 2 Type-C 10 Gbps
1
Rear USB 3.2 Gen 2×2 Type-C 20 Gbps
1
Front USB 3.2 Gen 2 Type-C 10 Gbps
1
Front USB-C PD
15 W
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
2
Header USB4 Type-C
1

Networking

Ethernet
Intel® 2.5Gb Ethernet
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
ROG SupremeFX ALC4080, Savitech SV3H712 AMP
Analog jacks
2
Gold-plated jacks
No
Optical S/PDIF
Yes
Spatial audio
No

Buttons

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

Additional information

Memory notes
Supports Un-buffered DIMMs. Supports AMD Extended Profiles for Overclocking (EXPO™) and ASUS Enhanced Memory Profile (AEMP). Supported memory types, data rate, and number of DRAM modules vary depending on the CPU and memory configuration. Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Display notes
Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications. VGA resolution support depends on processors' or graphic cards' resolution.
Expansion notes
Specifications vary by CPU type. With AMD Ryzen™ 8000 Series Desktop Processors, the PCIe 5.0 x16 slot supports PCIe 4.0 x8 or x4 mode. The PCIe 4.0 x16 slot (PCIEX16(G4)) from the AMD B850 Chipset supports x4 mode and shares bandwidth with the M.2_3 slot.
M.2_1
5.0 4 · 2242, 2260, 2280 · CPU — Supported PCIe version depends on the CPU series: PCIe 5.0 for Ryzen 7000/9000 series, PCIe 4.0 for Ryzen 8000 series.
M.2_2
4.0 4 · 2280, 22110 · CPU — Supported speed varies by CPU type: x4 mode for Ryzen 7000/9000 series, x4/x2 mode for Ryzen 8000 series.
M.2_3
4.0 4 · 2280 · Chipset — M.2_3 slot shares bandwidth with PCIEX16(G4). When PCIEX16(G4) slot is operating, M.2_3 will be disabled.
M.2_4
4.0 4 · 2280 · Chipset
RAID
SATA / PCIe (['0', '1', '5', '10'])
Storage notes
RAID support and levels vary by CPU series: Ryzen 9000 (RAID 0/1/5/10), Ryzen 8000 (RAID 0/1), Ryzen 7000 (RAID 0/1/10). The specifications for M.2_1 and M.2_2 slots also vary by CPU type.
Audio notes
Features SupremeFX Shielding Technology, premium audio capacitors, and impedance sense for front and rear headphone outputs. High quality 120 dB SNR stereo playback output and 110 dB SNR recording input. Supports up to 32-Bit/384 kHz playback on the front panel. The LINE OUT port on the rear panel does not support spatial audio; it must be used via the front panel audio jack or a USB device. A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Networking notes
Wi-Fi features may vary depending on the operating system. For Windows 11, Wi-Fi 7 requires 24H2 or later for full functions; earlier versions only support Wi-Fi 6E. For Windows 10, only Wi-Fi 6 is supported. Wi-Fi 6GHz frequency band and bandwidth regulations may vary by country. The Bluetooth version may vary; refer to the Wi-Fi module manufacturer's website. Wi-Fi supports up to 2.9Gbps transfer rate.
Button notes
The text also lists a miscellaneous 'Power button'.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 4 chassis · 3 ARGB · — RGB
Thermal sensors
1
Other headers
Front audio · System panel · Thunderbolt
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

4 x DIMM slots, max. 256GB, DDR5
Supports up to 8000+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors
ECC and Non-ECC, Un-buffered DIMM
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO™)
ASUS Enhanced Memory Profile (AEMP)
* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/.
** Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Graphics

1 x DisplayPort*
1 x HDMI™ port**
- Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
* Supports max. 8K@30Hz as specified in DisplayPort 1.4
** Supports 4K@60Hz as specified in HDMI 2.1
*** VGA resolution support depends on processors' or graphic cards' resolution.

Expansion slots

AMD Ryzen™ 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot with Q-Release Slim
AMD Ryzen™ 8000 Series Desktop Processors
1 x PCIe 5.0 x16 slot with Q-Rlease Slim (supports PCIe 4.0 x8 or x4 mode)*
AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)**
* Specifications vary by CPU types.
** PCIEX16(G4) slot (supports x4 mode) from AMD B850 Chipset shares bandwidth with M.2_3
- To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

Storage

Total supports 4 x M.2 slots and 2 x SATA 6Gb/s ports

AMD Ryzen™ 7000 & 9000 Series Desktop Processors
M.2_1 (Key M), type 2242/2260/2280 (supports PCIe 5.0x4 mode)
M.2_2 (Key M), type 2280/22110 (supports PCIe 4.0 x4 mode)
AMD Ryzen™ 8000 Series Desktop Processors
M.2_1 (Key M), type 2242/2260/2280 (supports PCIe 4.0x4 mode)
M.2_2 (Key M), type 2280/22110 (supports PCIe 4.0 x4/x2 mode)*

AMD B850 Chipset
M.2_3 (Key M), type 2280 (supports PCIe 4.0 x4)**
M.2_4 (Key M), type 2280 (supports PCIe 4.0 x4)
2 x SATA 6Gb/s ports
* Specifications vary by CPU types.
** M.2_3 slot shares bandwidth with PCIEX16(G4). When PCIEX16(G4) slot is operating, M.2_3 will be disabled.

AMD RAIDXpert2 Technology
Ryzen™ 9000 Series Processors: RAID 0/1/5/10
Ryzen™ 8000 Series Processors: RAID 0/1
Ryzen™ 7000 Series Processors: RAID 0/1/10

USB

Rear USB (Total 10 ports)
1 x USB 20Gbps port (1 x USB Type-C®)
3 x USB 10Gbps ports (2 x Type-A + 1 x USB Type-C®)
4 x USB 5Gbps ports (4 x Type-A)
2 x USB 2.0 ports (2 x Type-A)

Front USB (Total 7 ports)
1 x USB 10Gbps connector (supports USB Type-C®)
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
* USB Type-C® power delivery output: max. 5V/3A

Internal I/O

Fan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
4 x 4-pin Chassis Fan headers
Power Related
1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connector
Storage Related
4 x M.2 slots (Key M)
2 x SATA 6Gb/s ports
USB
1 x USB 10Gbps connector (supports USB Type-C®)
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Miscellaneous
3 x Addressable Gen 2 headers
1 x CPU Over voltage jumper
1 x Front Panel Audio header (F_AUDIO)
1 x Power button
1 x 10-1 pin Front System Panel header
1 x Thermal Sensor header
1 x Thunderbolt™ (USB4®) header

Rear I/O

1 x USB 20Gbps port (1 x USB Type-C®)
3 x USB 10Gbps ports (2 x Type-A + 1 x USB Type-C®)
4 x USB 5Gbps ports (4 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI™ port
1 x Wi-Fi module
1 x Intel® 2.5Gb Ethernet port
2 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack™ button
1 x Clear CMOS button

Wireless

Wi-Fi 7*
2x2 Wi-Fi 7 (802.11be)
Supports 2.4/5/6GHz frequency band**
Supports Wi-Fi 7 160MHz bandwidth, up to 2.9Gbps transfer rate.
Bluetooth® v5.4***

*Wi-Fi features may vary depending on the operating system
For Windows 11, Wi-Fi 7 will require 24H2 or later version for full functions, Windows 11 21H2/22H2/23H2 only supports Wi-Fi 6E.
For Windows 10, only Wi-Fi 6 is supported.
** Wi-Fi 6GHz frequency band and bandwidth regulatory may vary between countries.
*** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.

Audio

ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
- Impedance sense for front and rear headphone outputs
- Supports: Jack-detection, Multi-streaming, Front Panel MIC Jack-retasking
- High quality 120 dB SNR stereo playback output and 110 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback on front panel
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP
- Rear optical S/PDIF out port
- Premium audio capacitors
- Audio cover
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
** The LINE OUT port on the rear panel does not support spatial audio. If you wish to use spatial audio, make sure to connect your audio output device to the audio jack on the front panel of your chassis or use a USB interface audio device.

Special features

Extreme Engine Digi+
- 5K Black metallic capacitors
ASUS Q-Design
- M.2 Q-Latch
- M.2 Q-Release
- M.2 Q-Slide
- PCIe Slot Q-Release Slim (with PCIe SafeSlot)
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink backplate
- M.2 heatsink
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Clear CMOS button
- ProCool
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Aura Sync
- Addressable Gen 2 headers

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