Learn more about ASRock B850 PRO-A WIFI

Model
Brand
ASRock
Model
B850 PRO-A WIFI
Supported CPU
CPU Socket Type
AM5
CPU Type
Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
Chipsets
Chipset
AMD B850
Memory
Number of Memory Slots
4x288pin (DDR5)
Memory Standard
Up to 8000+(OC)
Maximum Memory Supported
256GB
Channel Supported
Dual Channel
ECC Supported
Yes
Buffer Supported
Un-buffered
Expansion Slots
PCI Express 5.0 x16
1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*

* PCIE1 will run at Gen5x16 with 9000 and 7000 series processors, Gen4x8 with 8000 (Phoenix 1) series processors and Gen4x4 with 8000 (Phoenix 2) series processors.
* If M2_3 is occupied, PCIE2 will be disabled.
* Supports NVMe SSD as boot disks
- 15µ Gold Contact in VGA PCIe Slot (PCIE1)
PCI Express 4.0 x16
1 x PCIe 4.0 x16 Slot (PCIE2), supports x4 mode*
Storage Devices
SATA 6Gb/s
4 x SATA 6Gb/s
M.2
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 2280 PCIe Gen4x4 (64 Gb/s) mode*
Chipset:
- 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2230/2242/2260/2280 PCIe Gen4x4
(64 Gb/s) mode*
- 1 x Ultra M.2 Socket (M2_4, Key M), supports type 2280 PCIe Gen3x4 (32 Gb/s) mode*

* Supports NVMe SSD as boot disks
* M2_1 is the first priority for M.2 installation.
* M2_1 will run at Gen5x4 with 9000 and 7000 series processors and Gen4x4 with 8000 (Phoenix 1 and Phoenix 2) series processors.
* M2_2 will run at Gen4x4 with 9000 and 7000 series processors, Gen4x4 with 8000 (Phoenix 1) series processors and Gen4x2 with 8000 (Phoenix 2) series processors.
* If M2_3 is occupied, PCIE2 will be disabled.
* If SATA3_1 or SATA3_2 is occupied, M2_4 will downgrade to Gen3x2 mode
SATA RAID
Supports RAID 0 and RAID 1 for SATA storage devices
Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Onboard Audio
Audio Chipset
Realtek ALC897
Audio Channels
7.1 Channels
Onboard LAN
LAN Chipset
Dragon RTL8125BG
Max LAN Speed
2.5Gbps
Wireless LAN
Wi-Fi 802.11 ax
Bluetooth
Bluetooth 5.2
Rear Panel Ports
Back I/O Ports
2 x Antenna Ports
1 x HDMI Port
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
1 x USB 3.2 Gen1 Type-C Port (DP-alt mode supports DP1.4a)
4 x USB 3.2 Gen1 Type-A Ports
6 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
HD Audio Jacks: Line in / Front Speaker / Microphone
Internal I/O Connectors
Onboard USB
2 x USB 2.0 Headers (Support 3 USB 2.0 ports)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)
Other Connectors
1 x SPI TPM 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)***
4 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control)***
1 x AIO Pump Fan Connector (4-pin) (Smart Fan Speed Control)***
1 x Front Panel Audio Connector
* Supports in total up to 12V/3A, 36W LED Strip
** Support in total up to 5V/3A, 15W LED Strip
*** CPU_FAN1 supports the fan power up to 1A (12W).
*** CPU_FAN2, CHA_FAN1~4 and AIO_PUMP support the fan power up to 3A (36W).
*** CPU_FAN2, CHA_FAN1~4 and AIO_PUMP can auto detect if 3-pin or 4-pin fan is in use.
Physical Spec
Form Factor
ATX
Dimensions (W x L)
12.0" x 9.6"
Power Pin
1 x 24 pin ATX Power Connector
2 x 8 pin 12V Power Connectors (Hi-Density Power Connector)
Software Feature
BIOS Feature
256Mb AMI UEFI Legal BIOS with GUI support
Software
Software
- ASRock Motherboard Utility (A-Tuning)
- ASRock Dragon 2.5G LAN Software
- ASRock Polychrome SYNC
* These utilities can be downloaded from ASRock Live Update & APP Shop.
UEFI
- ASRock EZ Mode
- ASRock Full HD UEFI
- ASRock Auto Driver Installer
- ASRock Instant Flash
Windows 11
Windows OS 10 64-bit / 11 64-bit
Features
Features
Superb Productivity
- PCIe Gen5 (Graphics, M.2)
- Dual Channel DDR5
Rock-Solid Durability
- 14+2+1 Power Phase, 80A Dr.MOS for VCore+SOC+MISC
Ultrafast Connectivity
- 2.5G LAN, 802.11axe Wi-Fi 6E Module
EZ Update
- BIOS Flashback Button
- ASRock Auto Driver Installer
EZ Troubleshooter
- ASRock Post Status Checker
Packaging
Package Contents
1 x I/O Shield
2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
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