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ATX motherboard, dark PCB with silver heatsinks and rear I/O shield

ASRock

ASRock B850 Rock WiFi 7 AMD motherboard

SKU CH-79K1-4ARCH MPN B850 Rock WiFi 7

ATX board for AM5 Ryzen CPUs with DDR5 up to 256 GB, PCIe 5.0 x16, Gen5 M.2, WiFi 7 and 7.1 audio

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB

Model B850 Rock WiFi 7

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  • Ready for Ryzen 9000, 8000 and 7000 series CPUs
  • 9+2+1 Dr.MOS power phases for stable delivery
  • Four DDR5 slots support up to 256 GB dual-channel
  • Blazing M.2 socket runs at PCIe 5.0 x4 128 Gb/s
  • Realtek ALC897 codec provides 7.1-channel HD audio

AM5 Socket for Ryzen 7000, 8000, 9000

The ASRock B850 Rock WiFi 7 is an ATX motherboard built on the AMD B850 chipset. It supports AM5 socket processors across the Ryzen 7000, 8000 and 9000 series. The board provides four DDR5 DIMM slots with a maximum capacity of 256 GB and dual-channel operation. It includes WiFi 7 connectivity and a 9+2+1 Dr.MOS power phase design.

PCIe 5.0 x16 Slot Decides GPU Bandwidth

Builders pairing a Ryzen 9000 or 7000 series CPU gain a full Gen5 x16 link on the primary slot. With Ryzen 8000 Phoenix 1 the same slot runs at Gen4 x8, and with Phoenix 2 at Gen4 x4. A second PCIe 4.0 x16 slot wired x4 and two PCIe x4 slots handle add-in cards. This board suits high-bandwidth GPU needs; those using Phoenix 2 CPUs should consider a different chipset.

Blazing M.2 Gen5 x4 for Primary NVMe

The CPU-attached M.2 socket (M2_1) delivers PCIe 5.0 x4 speeds up to 128 Gb/s for a 2280 NVMe drive. A chipset-attached Hyper M.2 (M2_2) adds a Gen4 x4 slot at 64 Gb/s. Four SATA 6 Gb/s ports support RAID 0, 1, 10. The single Gen5 M.2 slot is the decisive storage spec; systems needing multiple Gen5 drives require a different platform.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $142.99
Cheaper than about 64% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameAMD
Model nameB850 Rock WiFi 7
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesIntel XMP/ AMD EXPO
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
Graphics
Onboard video chipAMD RDNA Integrated
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerDragon RTL8125BG
Maximum network speed2.5 Gbit/s
Wi-Fi standardWiFi IEEE 802.11 a / b / g / n / ac / ax / be
Bluetooth support5.4
Ports & slots
PCIe x4 slots2 x PCI Express x4
Additional slots1 x USB 3.2 Gen1 Type-C, 4 x USB 3.2 Gen1 Type-A, 4 x USB 2.0
Rear panel ports- 2 x Antenna Ports
- 1 x HDMI Port
- 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
- 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
- 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 USB headers2 x USB 3.2 Gen1 + 2 x USB 2.0
Power
Power connectors24 Pin
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight1.68 kg
Package size356 × 279 × 76 mm
Compatibility
Windows 11 supportSupported
In the box
In the box- 2 x SATA Data Cables
- 2 x ASRock WiFi 2.4/5/6 GHz Antennas
More details
LightingRGB
BIOS512Mb AMI UEFI Legal BIOS with GUI support

Other versions of this model

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Questions about this item

Should I pick the B850 Rock WiFi 7 or a different B850 model for a Ryzen 9000 build?

The B850 Rock WiFi 7 runs its primary PCIe 5.0 x16 slot at full Gen5x16 with Ryzen 9000 CPUs, while the second x16 slot operates at Gen4x4 and the CPU-linked M.2 reaches 128 Gb/s.

What does the 128 Gb/s Blazing M.2 rating mean for my NVMe drive in daily use?

That figure is the PCIe Gen5x4 ceiling; a compatible drive will hit its rated sequential speeds, while random I/O and thermal limits will determine real-world responsiveness.

How does the AM5 socket affect which Ryzen 7000, 8000 and 9000 chips I can install?

The board accepts all three series; 7000 and 9000 unlock Gen5x16 on the top slot and Gen4x4 on the second, whereas 8000 Phoenix 1 drops the top slot to Gen4x8 and Phoenix 2 to Gen4x4.

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