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ASRock B850M Pro-A WiFi micro-ATX motherboard, black PCB, silver heatsinks

ASRock

ASRock B850M Pro-A WiFi AMD motherboard

SKU CH-9KD1-Q8WYQ MPN B850M Pro-A WiFi

Micro-ATX AM5 board with 8+2+1 Dr.MOS power, DDR5 up to 8000+, PCIe 5.0 x16, Gen5 and Gen4 M.2 slots, 7.1 audio and Dragon 8125BG LAN

  • CPU Socket TypeAM5
  • CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to 8000+(OC)
  • Maximum Memory Supported256GB

Option B850M Pro-A WiFi

Les versions barrées existent, mais ne sont pas disponibles ici.

  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5 socket
  • 8+2+1 phase Dr.MOS power design delivers stable CPU voltage
  • Four DDR5 slots accept up to 256 GB at 8000+ MT/s OC
  • One PCIe 5.0 x16 slot plus one PCIe 4.0 x4 slot
  • Two M.2 sockets: one Gen5 x4 128 Gb/s and two Gen4 x4 64 Gb/s

AM5 Micro-ATX board for Ryzen 7000 8000 9000

This B850 chipset motherboard fits AM5 socket processors from the Ryzen 7000 8000 and 9000 families. It uses a 6 layer PCB with an 8+2+1 phase DrMOS power design and Hi-Density power connectors for stable delivery. Four DDR5 slots support up to 256 GB in dual channel with EXPO and XMP 3.0 profiles.

Suits builders who need Gen5 graphics and storage

The primary PCIe 5.0 x16 slot runs at Gen5 x16 with Ryzen 9000 and 7000 CPUs but drops to Gen4 x8 or Gen4 x4 with Ryzen 8000 series chips. One CPU linked M.2 socket delivers PCIe Gen5 x4 speeds while two chipset M.2 sockets provide Gen4 x4. Four SATA ports and SATA plus NVMe RAID support complete the storage options.

PCIe 5.0 x16 slot speed depends on CPU generation

With a Ryzen 9000 or 7000 processor the top slot operates at Gen5 x16 giving 128 Gb/s bandwidth to the graphics card. Ryzen 8000 Phoenix 1 CPUs limit it to Gen4 x8 and Phoenix 2 CPUs to Gen4 x4. Check your exact processor model before purchase to confirm the link speed you will receive.

Points forts

  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5 socket
  • 8+2+1 phase Dr.MOS power design delivers stable CPU voltage
  • Four DDR5 slots accept up to 256 GB at 8000+ MT/s OC
  • One PCIe 5.0 x16 slot plus one PCIe 4.0 x4 slot
  • Two M.2 sockets: one Gen5 x4 128 Gb/s and two Gen4 x4 64 Gb/s

Caractéristiques

BrandASRock
ModelB850M PRO-A WIFI
CPU Socket TypeAM5
CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
ChipsetAMD B850
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to 8000+(OC)
Maximum Memory Supported256GB
Channel SupportedDual Channel
Memory Performance ProfileAMD EXPO / Intel XMP 3.0
ECC SupportedYes
Buffer SupportedUn-buffered
PCI Express 5.0 x161 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 x161 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode*
Serial ATA (SATA)4 x SATA 6Gb/s
M.2CPU:
- 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 proc
SATA RAIDSupports 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
Audio ChipsetRealtek ALC897
Audio Channels7.1 Channels
LAN ChipsetDragon RTL8125BG
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 ax
BluetoothBluetooth 5.2
Back I/O Ports2 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
Onboard USB2 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 Connectors1 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.
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Power Pin1 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)
BIOS Feature256Mb AMI UEFI Legal BIOS with GUI support
SoftwareSoftware
- 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 11Windows OS 10 64-bit / 11 64-bit
FeaturesSuperb 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
Package Contents1 x I/O Shield
2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
Poids d’expédition1.23 kg
Dimensions du colis305 × 269 × 66 mm

Autres versions de ce modèle

5 de plus dans cette gamme

Même famille, mémoire, ventirad ou fréquence différents — comparez avant de vous décider.

Questions sur cet article

Does the board ship with mounting screws for the three M.2 slots or do I need to buy them separately?

The motherboard includes the standoffs and screws required for the three onboard M.2 sockets, so no separate hardware is needed for installation.

Should I choose a Ryzen 7000, 8000 or 9000 series CPU to get the full PCIe 5.0 x16 and Gen5 M.2 bandwidth?

Ryzen 9000 and 7000 series processors run the primary PCIe 5.0 x16 slot at Gen5 x16 and the Blazing M.2 at Gen5 x4, while 8000 series CPUs limit the slot to Gen4 x8 or x4.

What does the 8000+(OC) DDR5 rating mean once the board is built into a working PC?

It indicates the maximum overclocked memory frequency the board can reach with AMD EXPO or Intel XMP 3.0 modules; actual speed depends on the CPU memory controller and cooling.

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