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ASUS · AM5 · B850

ROG STRIX B850-A GAMING WIFI

ATX · DDR5 · 4 DIMMs · 14-phase VRM · Wi-Fi 7 (802.11be)

Quality
78
VRM
60
Value
74
Amazon
$200
ROG STRIX B850-A GAMING WIFI
View ROG STRIX B850-A GAMING WIFI Gallery in high resolution
$200
Unavailable Updated 1 week, 5 days ago
Overall77.6
VRM60.0
Chipset89.0
Expansion / storage78.0
Connectivity73.0
Audio88.0
Quality / price73.7
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Written analysis

ROG STRIX B850-A GAMING WIFI at a glance

The ROG STRIX B850-A GAMING WIFI uses the ATX form factor, AM5 socket, and AMD B850 Chipset 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.

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+1 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 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 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 73.0, rated strong . Wireless networking is Wi-Fi 7 (802.11be) ; wired networking is 1 x Intel ® 2.5Gb EthernetASUS LANGuard at up to 2500 Mbps. Bluetooth v5.4 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 7.1 Surround Sound High Definition Audio CODEC ALC4080*, 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 77.60, 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 73.7—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
ROG STRIX B850-A GAMING WIFI
Chipset / socket
AMD B850 Chipset / AM5
Form factor
ATX
Launch price
—
Amazon price
$200
Availability
Unavailable
Price updated
1 week, 5 days 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
Not recorded
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
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

Networking

Ethernet
1 x Intel ® 2.5Gb EthernetASUS LANGuard
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
Wi-Fi 7 (802.11be)
Wi-Fi bandwidth
160MHz
Bands
['2.4 GHz', '5 GHz', '6 GHz']
Antenna connectors
2
Bluetooth
v5.4

Audio

Chipset
ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
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

CPU support
AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* * Refer to https://www.asus.com/support/download-center/ for CPU support list.
OS support
Windows 11
Memory notes
DDR5 support. OC speeds up to 8000+ MT/s with Ryzen 9000, 8000 & 7000 series processors. Supports both ECC and Non-ECC un-buffered DIMMs; Non-ECC un-buffered DDR5 supports On-Die ECC (not necessarily full ECC mode). Supports AMD EXPO (Extended Profiles for Overclocking) and ASUS Enhanced Memory Profile (AEMP). Supported memory types, data rates, and module counts vary by CPU and memory configuration — see CPU/Memory Support list or https://www.asus.com/support/download-center/.
Display notes
Onboard connectors: 1 x DisplayPort and 1 x HDMI. Graphics specifications may vary between CPU types—refer to AMD CPU specifications. VGA resolution support depends on the processor or discrete graphics card. DisplayPort supports up to 8K@30Hz (DP 1.4); HDMI supports up to 4K@60Hz (HDMI 2.1).
Expansion notes
Supports PCIe 5.0 as the maximum generation (up to 64 GB/s total bandwidth for a full x16 PCIe 5.0 slot), backward compatible with earlier PCIe versions. Slot breakdown: one CPU-connected PCIe 5.0 x16 physical slot (counts as Gen5 x16) and one chipset-provided PCIe 4.0 x16 physical slot (counts as Gen4 x16). Notes: the PCIe 5.0 x16 slot may operate at reduced widths/speeds depending on CPU (text indicates with AMD Ryzen 8000 series it can run as PCIe 4.0 x8 or x4), and the AMD B850 chipset PCIEX16(G4) slot supports x4 mode and shares bandwidth with M.2_3. Specifications vary by CPU; consult the vendor support list for device compatibility.
M.2_1
PCIe 5.0 x4 (with Ryzen 7000/9000); PCIe 4.0 x4 (with Ryzen 8000) 4 · 2242, 2260, 2280 · From CPU — Performance depends on CPU: PCIe 5.0 x4 with Ryzen 7000/9000; limited to PCIe 4.0 x4 with Ryzen 8000.
M.2_2
PCIe 4.0 x4 (may operate as x2 on some Ryzen 8000 CPUs) 4 · 2280, 22110 · From CPU — Specifications vary by CPU types; on AMD Ryzen 8000 Series M.2_2 may operate in PCIe 4.0 x4 or x2 modes.
M.2_3
PCIe 4.0 x4 4 · 2280 · From B850 Chipset — Shares bandwidth with PCIEX16(G4). When PCIEX16(G4) slot is operating, M.2_3 will be disabled.
M.2_4
PCIe 4.0 x4 4 · 2280 · From B850 Chipset
RAID
SATA / PCIe (Ryzen 9000: RAID 0/1/5/10; Ryzen 8000: RAID 0/1; Ryzen 7000: RAID 0/1/10)
Storage notes
Total: 4 M.2 slots and 2 x SATA 6Gb/s ports. M.2_1 and M.2_2 behaviors/specs vary by CPU generation (see per-slot notes). M.2_3 is chipset-provided and will be disabled when PCIEX16(G4) is in use. Specifications note that features vary by CPU types. AMD RAIDXpert2 provides RAID functionality with levels dependent on CPU series.
USB notes
Rear: 1x USB 20Gbps Type-C (USB 3.2 Gen 2x2), 3x USB 10Gbps (2x Type-A + 1x Type-C, USB 3.2 Gen 2), 4x USB 5Gbps Type-A (USB 3.2 Gen 1), 2x USB 2.0 Type-A. Front: 1x USB 10Gbps Type-C port (USB 3.2 Gen 2) and header support: one USB 5Gbps header providing 2 additional USB 5Gbps ports, and two USB 2.0 headers providing 4 additional USB 2.0 ports. Front USB Type-C supports Power Delivery 5V/3A (15W). Internal I/O lists a Thunderbolt (USB4) header and repeats the front header info, but those USB4/header items were not counted in the primary port totals.
Audio notes
Impedance sense for front and rear headphone outputs; supports jack-detection, multi-streaming, and front-panel MIC jack-retasking; 120 dB SNR stereo playback and 110 dB SNR recording; supports up to 32-Bit/384 kHz playback on front panel; SupremeFX shielding technology; Savitech SV3H712 AMP; premium audio capacitors and audio cover; chassis front HD audio module required to support 7.1 output; rear LINE OUT does not support spatial audio (use front-panel jack or USB audio device for spatial audio).
Networking notes
ASUS LANGuard; 2x2 Wi-Fi 7 supports up to 2.9 Gbps transfer rate; Wi-Fi features vary by OS (Wi-Fi 7 requires Windows 11 24H2 or later for full functions; Windows 11 21H2/22H2/23H2 support Wi-Fi 6E only; Windows 10 has no driver). Bluetooth version may vary by Wi-Fi module vendor.
Button notes
Power button present; no Smart Button or Q-Flash Plus button mentioned. Other related headers/features: 10-1 Front System Panel header (front panel connectors), Front Panel Audio (F_AUDIO), CPU Over voltage jumper, Thermal Sensor header, Thunderbolt (USB4) header, 3 x Addressable Gen2 headers. Numerous USB ports/headers and the listed BIOS FlashBack and Clear CMOS buttons are present.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 4 chassis · 3 ARGB · — RGB
Thermal sensors
1
Other headers
Front audio · System panel · Thunderbolt
Accessories
Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x ASUS WiFi Q-Antenna 1 x Cable ties package 1 x M.2 Q-Latch package 1 x M.2 Q-Slide package 1 x ROG key chain 1 x ROG Strix stickers 4 x M.2 rubbers Documentation 1 x Quick start guide
Dimensions
ATX Form Factor12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

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

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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.

CPU support

AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*
* Refer to https://www.asus.com/support/download-center/ for CPU support list.

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, please note that no driver is available, refer to the Wi-Fi chipset vendor's website for details.
** 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

Accessories

Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x Cable ties package
1 x M.2 Q-Latch package
1 x M.2 Q-Slide package
1 x ROG key chain
1 x ROG Strix stickers
4 x M.2 rubbers
Documentation
1 x Quick start guide

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