ASRock B850M PRO-A WIFI AM5 AMD B850 Micro ATX Motherboard

Brand ASRock

Model B850M PRO-A WIFI

Supported CPU

CPU Socket Type AM5

CPU Type Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series

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 x4 Slot (PCIE2), supports x4 mode*

Storage Devices

Serial ATA (SATA) 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*

Chipset:

- 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2280 PCIe Gen4x4 (64 Gb/s) mode*

- 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2280 PCIe Gen4x4 (64 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_3 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.

SATA RAID Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices

Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices*

* Requires additional M.2 NVMe expansion cards to support RAID 10

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 DisplayPort 1.4

1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)

1 x USB 3.2 Gen2 Type-C Port

2 x USB 3.2 Gen1 Ports

4 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 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 Gen1 Header

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)***

3 x Chassis Fan Connectors (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 and CHA_FAN1~3 support the fan power up to 3A (36W).

*** CPU_FAN2 and CHA_FAN1~3 can auto detect if 3-pin or 4-pin fan is in use.

Physical Spec

Form Factor Micro ATX

Dimensions (W x L) 9.6" x 9.6"

Power Pin 1 x 24 pin ATX Power Connector

1 x 8 pin 12V Power Connector (Hi-Density Power Connector)

1 x 4 pin 12V Power Connector (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

- 8+2+1 Power Phase, 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