ASRock B850M PRO RS WiFi Micro ATX Motherboard
The ASRock B850M PRO RS WiFi is a Micro ATX motherboard designed for AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series processors, delivering superb productivity, ultrafast connectivity, and rock-solid durability in a compact 9.6" x 9.6" form factor.
Key Features
- AMD Socket AM5 Support
- Supports Ryzen 9000, 8000 and 7000 Series Processors
-
8+2+1 Power Phase Design with Dr.MOS for VCore + SOC + MISC
-
High-Speed DDR5 Memory
- 4 x DDR5 DIMM slots
- Dual Channel DDR5 up to 8000+ (OC)
- Supports DDR5 ECC/non-ECC, un-buffered memory
- Max system memory capacity: 256GB
-
Supports XMP and EXPO memory profiles
-
PCIe & Expansion
- 1 x PCIe 5.0 x16 slot (PCIE1), supports x16 mode
- 1 x PCIe 4.0 x4 slot (PCIE2), supports x4 mode
- 1 x M.2 (Key E) for type 2230 WiFi/BT PCIe module
- PCIe Gen5 support for graphics and M.2
-
15µ Gold Contact in VGA PCIe Slot (PCIE1)
-
Advanced Storage
- 1 x Blazing M.2 (PCIe Gen5x4)
- 2 x Hyper M.2 (PCIe Gen4x4)
- 4 x SATA3 6.0 Gb/s connectors
- Supports NVMe SSDs as boot disks
-
Supports RAID 0, 1, 10 for SATA and M.2 NVMe storage
-
Graphics Output Options
- Integrated AMD RDNA graphics (actual support may vary by CPU)
- 1 x HDMI 2.1 TMDS/FRL 8G compatible (HDR, HDCP 2.3, up to 4K 120Hz)
-
1 x DisplayPort 1.4 with DSC (HDCP 2.3, up to 4K 120Hz)
-
Audio & Networking
- Realtek ALC897 7.1 CH HD Audio Codec
- Nahimic Audio
- Realtek Dragon RTL8125BG 2.5G LAN (10/100/1000/2500 Mb/s)
-
Dragon 2.5G LAN software with bandwidth control and profiles
-
WiFi 6E & Bluetooth
- 802.11axe Wi-Fi 6E module
- Dual-band 2x2 with extended 6GHz band support
- Supports Bluetooth 5.2 and MU-MIMO
- Includes 2 x antennas
- Wi-Fi 6E module supported by Windows 11 only (no driver for Windows 10)
-
6GHz availability depends on regional regulations and requires a 6GHz compatible router
-
Connectivity & I/O
- Front and rear USB 3.2 Type-C
- Multiple USB 3.2 Gen2 / Gen1 and USB 2.0 ports
- Pre-installed I/O shield
-
BIOS Flashback button
-
Thermal & Build Features
- M.2 bottom heatsink for efficient SSD cooling
- Smart Fan Speed Control for CPU and chassis fans
-
Supports 12V RGB and 5V addressable LED strips
-
User-Friendly Utilities
- BIOS Flashback
- ASRock Auto Driver Installer
- ASRock Post Status Checker
- ASRock UEFI with EZ Mode and Full HD interface
- ASRock Polychrome SYNC lighting software
Specifications
Platform
| Item | Detail |
|---|---|
| Form Factor | Micro ATX, 9.6 in x 9.6 in (24.4 cm x 24.4 cm) |
| Chipset | AMD B850 |
Unique 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
- Pre-Installed I/O Shield
- Ultrafast Connectivity: 2.5G LAN, 802.11axe Wi-Fi 6E
- EZ Update: BIOS Flashback Button, ASRock Auto Driver Installer
- EZ Troubleshooter: ASRock Post Status Checker
CPU Support
| Item | Detail |
|---|---|
| Socket | AMD AM5 |
| Support | Ryzen 9000, 8000 and 7000 Series Processors |
Memory
| Feature | Detail |
|---|---|
| Memory Type | Dual Channel DDR5 |
| Slots | 4 x DDR5 DIMM |
| Capacity | Up to 256GB |
| Supported Modules | DDR5 ECC/non-ECC, un-buffered |
| Overclocking | Up to 8000+ (OC) |
| Profile Support | XMP, EXPO |
Expansion Slots
| Source | Slot | Mode / Notes |
|---|---|---|
| CPU | 1 x PCIe 5.0 x16 (PCIE1) | Supports x16 mode |
| CPU | 1 x PCIe 4.0 x4 (PCIE2) | Supports x4 mode |
| Chipset | 1 x M.2 Socket (Key E) | Supports type 2230 PCIe WiFi/BT module |
PCIe Lane Behavior
- PCIE1:
- Gen5x16 with 9000 and 7000 Series processors
- Gen4x8 with 8000 (Phoenix 1) Series processors
-
Gen4x4 with 8000 (Phoenix 2) Series processors
-
If M2_3 is occupied, PCIE2 will be disabled.
- Supports NVMe SSD as boot disks.
Graphics
| Item | Detail |
|---|---|
| Integrated GPU | AMD RDNA graphics (support varies by CPU) |
| HDMI | 1 x HDMI 2.1 TMDS/FRL 8G compatible, HDR, HDCP 2.3, up to 4K 120Hz |
| DisplayPort | 1 x DP 1.4 with DSC, HDCP 2.3, up to 4K 120Hz |
Audio
| Item | Detail |
|---|---|
| Codec | Realtek ALC897 7.1 CH HD Audio |
| Enhancement | Nahimic Audio |
LAN
| Item | Detail |
|---|---|
| Controller | Dragon RTL8125BG 2.5 Gigabit LAN |
| Speeds | 10/100/1000/2500 Mb/s |
| Dragon 2.5G LAN Software | Smart Auto Adjust Bandwidth Control, visual UI, network usage statistics, optimized modes for game/browser/streaming, user-customized priority control |
Wireless LAN & Bluetooth
| Item | Detail |
|---|---|
| Module | 802.11axe Wi-Fi 6E |
| Standards | IEEE 802.11 a/b/g/n/ac/ax/axe |
| Band | Dual-Band 2x2 with extended 6GHz band support |
| Antennas | 2 x antennas (2T2R diversity) |
| Bluetooth | Bluetooth 5.2 |
| MU-MIMO | Supported |
| OS Support | Wi-Fi 6E module supported on Windows 11 only (no driver for Windows 10) |
| 6GHz Availability | Depends on regional regulations; activated via Windows/software updates where supported |
| Requirement | 6GHz compatible router required for Wi-Fi 6E functionality |
USB
| Source | Ports |
|---|---|
| CPU | 1 x USB 3.2 Gen2 Type-C (rear) |
| CPU | 1 x USB 3.2 Gen2 Type-A (rear) |
| Chipset | 1 x USB 3.2 Gen1 Type-C (front) |
| Chipset | 6 x USB 3.2 Gen1 Type-A (2 rear, 4 front) |
| Chipset | 8 x USB 2.0 (4 rear, 4 front) |
All USB ports support ESD Protection.
Rear Panel I/O
- 2 x Antenna mounting points
- 1 x HDMI port
- 1 x DisplayPort 1.4
- 1 x USB 3.2 Gen2 Type-A (10 Gb/s)
- 1 x USB 3.2 Gen2 Type-C
- 2 x USB 3.2 Gen1
- 4 x USB 2.0
- 1 x RJ-45 LAN port
- 1 x BIOS Flashback button
- HD Audio jacks: Line In / Front Speaker / Microphone
Storage
| Source | Connector | Mode / Notes |
|---|---|---|
| CPU | 1 x Blazing M.2 (M2_1, Key M) | Type 2280, PCIe Gen5x4 (128 Gb/s) |
| Chipset | 1 x Hyper M.2 (M2_2, Key M) | Type 2280, PCIe Gen4x4 (64 Gb/s) |
| Chipset | 1 x Hyper M.2 (M2_3, Key M) | Type 2280, PCIe Gen4x4 (64 Gb/s) |
| Chipset | 4 x SATA3 6.0 Gb/s | — |
Storage Notes
- M2_1 is the first priority for M.2 installation.
- M2_1:
- Gen5x4 with 9000 and 7000 Series processors
- Gen4x4 with 8000 (Phoenix 1 & Phoenix 2) Series processors
- M2_3:
- Gen4x4 with 9000 and 7000 Series processors
- Gen4x4 with 8000 (Phoenix 1) Series processors
- Gen4x2 with 8000 (Phoenix 2) Series processors
- If M2_3 is occupied, PCIE2 will be disabled.
- Supports NVMe SSDs as boot disks.
RAID
- Supports RAID 0, 1, 10 for SATA storage devices
- Supports RAID 0, 1, 10 for M.2 NVMe storage devices
- Requires additional M.2 NVMe expansion cards to support RAID 10
Connectors & Headers
- 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 24-pin ATX Power Connector
- 1 x 8-pin 12V Power Connector (Hi-Density)
- 1 x 4-pin 12V Power Connector (Hi-Density)
- 1 x Front Panel Audio Connector
- 2 x USB 2.0 Headers (support 4 x USB 2.0 ports)
- 2 x USB 3.2 Gen1 Headers (support 4 x USB 3.2 Gen1 ports)
- 1 x Front Panel Type-C USB 3.2 Gen1 Header
Power & LED Support
- Supports in total up to 12V/3A, 36W LED strip
- Supports in total up to 5V/3A, 15W LED strip
Fan Power
- CPU_FAN1: up to 1A (12W)
- CPU_FAN2, CHA_FAN1~3: up to 3A (36W) each
- CPU_FAN2 and CHA_FAN1~3 can auto-detect 3-pin or 4-pin fans
BIOS
- 256Mb AMI UEFI Legal BIOS with GUI support
Software & UEFI
- ASRock Motherboard Utility (A-Tuning)
- ASRock Dragon 2.5G LAN Software
- ASRock Polychrome SYNC
UEFI Features
- ASRock EZ Mode
- ASRock Full HD UEFI
- ASRock Auto Driver Installer
- ASRock Instant Flash
Operating System Support
- Microsoft Windows 10 64-bit
- Microsoft Windows 11 64-bit
(Wi-Fi 6E module supported by Windows 11 only.)
Certifications
- FCC
- CE
- ErP/EuP ready (requires ErP/EuP ready power supply)
Included Accessories
- 2 x SATA data cables
- 2 x ASRock WiFi 2.4/5/6 GHz antennas
Highlighted Technologies
-
8+2+1 Power Phase Design + Dr.MOS
Vcore with Dr.MOS design delivers smoother, more efficient power to the CPU. -
Blazing M.2 (PCIe Gen5x4)
Supports up to 3 x NVMe M.2 SSDs, including one that accommodates PCI Express 5.0. -
Pre-Installed I/O Shield
Speeds up installation and simplifies system assembly. -
M.2 Bottom Heatsink
Dissipates heat through the PCB to help maintain SSD performance and system stability. -
USB 3.2 Type-C (Front & Rear)
High-speed, reversible USB Type-C connectivity for both front panel and rear I/O. -
WiFi 6E (802.11axe)
Designed for faster, lower-latency wireless connectivity where 6GHz is available.
