Asrock B850 Pro RS AMD B850 Socket AM5 ATX Motherboard

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About This Item

  • AMD B850 chipset supporting AMD Ryzen 7000/8000/9000 Series processors on Socket AM5
  • 4 DDR5 DIMM slots up to 256 GB with ECC support and dual-channel memory
  • 1 PCIe 5.0 x16 and 1 PCIe 4.0 x16 slot with reinforced steel for heavy GPUs
  • 1 M.2 PCIe Gen5 slot plus 4 SATA III connectors for flexible storage options
  • ATX form factor with 14+2+1 power phase design and 8-layer PCB for stable overclocking
  • USB connectivity includes 4 USB 3.2 Gen 1 Type-A, 2 Type-C ports, and 6 USB 2.0 ports
  • 2.5GbE LAN and 7.1-channel audio with Nahimic support; no onboard Wi‑Fi

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Description

Asrock B850 Pro RS | AMD B850 ATX Motherboard

The Asrock B850 Pro RS AMD B850 Socket AM5 ATX is engineered for builders seeking stability and modern features. This motherboard supports AMD Ryzen 7000, 8000, and 9000 series processors. It delivers reliable performance for daily computing and gaming. The board features a robust power delivery system and DDR5 memory support. It is optimised for efficiency and durability in a standard ATX form factor.

Stable Power for AMD Ryzen AM5

The board uses a 14+2+1 power phase design with Dr. MOS components. This provides smooth and efficient power to the CPU. It supports overclocking while maintaining low temperatures. Hi-Density power connectors handle higher currents safely. This design ensures system stability during heavy workloads. It is built for long-term reliability.

DDR5 Memory and PCIe 5.0 Support

You get four DIMM slots for up to 256 GB of DDR5 memory. The board supports XMP and EXPO profiles for easy memory overclocking. An 8-layer PCB improves signal quality and thermal efficiency. For storage, the primary M.2 slot uses PCIe Gen5. This offers bandwidth up to 128 Gb/s for ultrafast SSDs. One PCIe x16 Gen 5 slot is available for next-gen graphics cards.

Connectivity and Networking

The rear I/O includes four USB 3.2 Gen 1 Type-A ports and one Type-C. There are also six USB 2.0 ports for peripherals. A HDMI port is included for integrated graphics output. Networking is handled by a 2.5 Gigabit Ethernet port (Dragon RTL8125BG). Note that this model does not include built-in Wi-Fi. You will need a separate adapter for wireless connectivity.

Audio and Lighting Features

Audio is powered by the Realtek ALC897 chip with Nahimic software. This provides 7.1-channel surround sound for immersive gaming and media. The board includes Polychrome RGB headers for custom lighting. You can synchronise addressable RGB devices. SignalRGB partnership offers advanced lighting control and effects.

Box contents

  • Asrock B850 Pro RS ATX Motherboard
  • 2 x SATA Data Cables
  • User Manual

Note: The product description lists cables included, but specific accessory details may vary by region. Please verify the full accessory list with the retailer.

Check before you buy

  • Confirm your case supports ATX (305 mm x 244 mm) dimensions.
  • Verify you have a suitable AM5 processor for this chipset.
  • Check you have adequate power supply connectors (24-pin and 8-pin EPS).
  • Confirm you have a separate Wi-Fi solution if wireless is required.

Frequently Asked Questions

Q: Does this motherboard support Wi-Fi?

A: No, the Asrock B850 Pro RS does not have built-in Wi-Fi. You will need a separate Wi-Fi adapter.

Q: What is the maximum memory capacity?

A: It supports up to 256 GB of DDR5 memory across four DIMM slots.

Q: Can I install a PCIe 5.0 graphics card?

A: Yes, there is one PCIe x16 Gen 5 slot for next-generation graphics cards.

Q: How many M.2 slots are available?

A: There is one M.2 slot that supports PCIe Gen5 for ultrafast storage.

Q: Is ECC memory supported?

A: Yes, the board lists ECC compatibility for error-correcting memory modules.

Q: What audio chip is used?

A: It uses the Realtek ALC897 audio codec with Nahimic 7.1-channel software support.

The Consultant’s Verdict and Warranty

This motherboard suits builders upgrading to AMD Ryzen 7000/8000/9000 series CPUs. It is ideal for gamers and professionals needing stable power and DDR5 performance. The PCIe 5.0 support future-proofs your storage and graphics. However, note the lack of Wi-Fi if you require wireless connectivity. Covered by the standard Manufacturer Warranty.

Additional information
USB 2.0 connectors2
USB 3.2 Gen 1 3.1 Gen 1 connectors2
TPM connectorYes
Number of SATA III connectors4
Number of chassis fan connectors4
Front panel audio connectorYes
EPS power connector 8-pinYes
CPU fan connectorYes
ATX Power connector 24-pinYes
RGB LED pin headerYes
USB 3.2 Gen 2x2 connectors1
Number of CPU fan connectors2
Number of EPS power connectors 8-pin2
Processor manufacturerAMD
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Processor socketSocket AM5
Number of memory slots4
Memory slots typeDIMM
Supported memory typesDDR5-SDRAM
Memory channelsDual-channel
Maximum internal memory256 GB
ECC сompatibilityECC
Supported storage drive interfacesM.2, SATA III
RAID levels1, 10
RAID supportYes
USB 3.2 Gen 1 3.1 Gen 1 Type-A ports quantity4
USB 3.2 Gen 1 3.1 Gen 1 Type-C ports quantity1
USB 3.2 Gen 2 3.1 Gen 2 Type-C ports quantity1
USB 2.0 ports quantity6
Microphone inYes
HDMI ports quantity1
Ethernet LAN RJ-45 ports1
Line-inYes
Ethernet LANYes
Wi-FiNo
LAN controllerDragon RTL8125BG
Ethernet interface type2.5 Gigabit Ethernet
Motherboard chipset familyAMD
Motherboard chipsetAMD B850
Audio output channels7.1 channels
Motherboard form factorATX
Component forPC
Audio chipRealtek ALC897
Number of M.2 M slots1
PCI Express x16 Gen 4.x slots1
PCI Express x16 Gen 5.x slots1
BIOS typeUEFI AMI
BIOS memory size256 Mbit
Windows operating systems supportedWindows 10 x64, Windows 11 x64
Width305 mm
Depth244 mm
Cables includedSATA
Distributor SKUs90-MXBQK0-A0UAYZ, 90-MXBQK-A0UAYZ, 563503, 559318, 550585, STD10229031, B850PRORS, CLB850PRORS

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