ASRock B850 Pro-A AMD AM5 Socket Motherboard, ATX, 4x DDR5 Slots, 4x M.2 Sockets, 3x USB-C Port, 2.5GbE LAN, 1x HDMI Port / 1x USB-C

ASRock B850 PRO A

Key Features
Supports AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors
14+2+1 Phase Power Design, 80A Dr.MOS for
VCore+SOC+MISC
4 x DDR5 DIMMs
Supports Dual Channel, up to 8000+ (OC)
1 x PCIe 5.0 x16, 1 x PCIe 4.0 x16, 1 x M.2 Key E for WiFi
Graphics Output Options: 1 x HDMI, 1 x USB Type-C (DP-alt)
Realtek ALC897 7.1 CH HD Audio Codec
1 x Blazing M.2 (PCIe Gen5x4)
2 x Hyper M.2 (PCIe Gen4x4)
1 x Ultra M.2 (PCIe Gen3x4)
4 x SATA3
1 x USB 3.2 Gen2x2 Type-C (Front)
1 x USB 3.2 Gen2 Type-C (Rear)
1 x USB 3.2 Gen1 Type-C (Rear)
6 x USB 3.2 Gen1 (4 Rear, 2 Front)
9 x USB 2.0 (6 Rear, 3 Front)
Realtek 2.5G LAN
Supports BIOS Flashback

14 + 2 + 1 POWER PHASE DESIGN + DR.MOS
Vcore with Dr.MOS design, delivering smoother and neater power to the CPU.

BLAZING M.2 (PCIE GEN5 x4)
Supports up to 4 x NVMe M.2 SSDs and one of which is able to accommodates the latest PCI Express 5.0 standard.

USB TYPE-C (DP-ALT MODE)
USB Alternate Mode allows USB Type-C ports to enable both data transfer and display output to DisplayPort monitors through a single cable.

FRONT USB 3.2 GEN2x2 TYPE-C
The latest USB 3.2 Gen2x2 Type-C delivers up to 20 Gbps data transfer rate which is 2x as fast as previous generation.

POLYCHROME SYNC
The RGB LED header allows user to create unique PC style easily.

M.2 KEY E FOR WIFI
Users may upgrade wireless module by M.2 (Key E) slot.

Specification

Platform
Micro ATX Form Factor: 12.0 in x 9.6-in, 30.5 cm x 24.4 cm

Unique Feature
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
EZ Update
BIOS Flashback Button
ASRock Auto Driver Installer
EZ Troubleshooter
ASRock Post Status Checker

CPU
Supports AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors

Chipset
AMD B850

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

Expansion Slot
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 M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module
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)

Graphics
Integrated AMD RDNATM 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
1 x USB 3.2 Gen1 Type-C, supports DP 1.4 HBR3 and max. resolution up to 4K 60Hz (DP-alt mode supports DP1.4a

Audio
7.1 CH HD Audio (Realtek ALC897 Audio Codec)

LAN
2.5 Gigabit LAN 10/100/1000/2500 Mb/s
Dragon RTL8125BG
Supports Dragon 2.5G LAN Software
Smart Auto Adjust Bandwidth Control
Visual User Friendly UI
Visual Network Usage Statistics
Optimized Default Setting for Game, Browser, and Streaming Modes
User Customized Priority Control

USB
CPU:
1 x USB 3.2 Gen2 Type-C (Rear)
1 x USB 3.2 Gen1 Type-C (Rear)
2 x USB 3.2 Gen1 Type-A (Rear (USB32_1 and USB32_2))
Chipset:
1 x USB 3.2 Gen2x2 Type-C (Front)
4 x USB 3.2 Gen1 Type-A (2 Rear (USB32_3 and USB32_4), 2 Front)
9 x USB 2.0 (6 Rear, 3 Front)
All USB ports support ESD Protection

Rear Panel I/O
2 x Antenna Mounting Points
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

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 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
2 x SATA3 6.0 Gb/s Connectors
ASMedia ASM1061:
2 x SATA3 6.0 Gb/s Connectors
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.

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

Connector
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 24 pin ATX 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 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)
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.

BIOS Feature
256Mb AMI UEFI Legal BIOS with GUI support

Software and UEFI
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

OS
Microsoft Windows 10 64-bit / 11 64-bit

Certifications
FCC, CE
ErP/EuP ready (ErP/EuP ready power supply is required)

Accessories
1 x I/O Shield
2 x SATA Data Cables
1 x Screw for M.2 Socket

• Socket: AM5
• CPU Compatibility: AMD Ryzen 9000/8000/7000
• Chipset: AMD B850
• Form Factor: ATX
• Memory Slots: DDR5 - 4 Slots
• M.2 Compatibility: PCIe 5 / PCIe 4 / PCIe 3
• USB C: Yes