Asrock · MPN: B850M CHALLENGER
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Overview

  • AMD Socket AM5 AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
  • PC micro ATX AMD B850 Realtek ALC897 7.1 channels
  • DDR5-SDRAM 4 DIMM Maximum internal memory: 256 GB
  • M.2, SATA III RAID support
  • BIOS type: UEFI AMI 512 Mbit
  • 2.5 Gigabit Ethernet

The Challenger Series motherboard represents fearless play, bold breakthroughs, and relentless evolution. With solid specs, Wi-Fi 7, and gamer-focused features like Lightning Gaming Ports and toolless installation, it’s a perfect choice for gamers.

Forge the Future Dominate the Game
Challenger Series is all about fearless play, bold breakthroughs, and relentless evolution. Packed with solid specs at a gamer-friendly price, it’s the ultimate option for gamers.

DDR5 XMP & EXPO Support
Derived from the “built for stable and reliable” designing concept, ASRock does not compromise on any details. This motherboard is built with high quality materials, enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles. Make sure the memory modules are Intel® XMP/AMD EXPO™ capable and overclocking can be made so affordable, satisfying and absolutely no sweat at all.

High Speed M.2 Solution
The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation, with a breathtaking 128Gb/s transfer speed, it is ready to unleash the full potential of future ultrafast SSDs.

Intelligent Cooling Design
Aluminum Heatsink
The first thing that catches the eye is the optimized Aluminum Heatsink Design. Heatsinks are crucial for efficient heat dissipation, especially during heavy workloads like gaming or productivity tasks. Motherboard that built with heatsinks can effectively manage thermal performance, hence ensure system stability and durability effortlessly.
PWM/DC Fan Support
ASRock fan headers automatically detect whether fans are running in DC or PWM mode, allowing users to fine-tune the fan curve and achieve quieter operation.
Fan-Tastic Tuning
ASRock Fan-Tastic Tuning function enables users to auto-detect the minimum duty of each fan with a single click. Users can also easily adjust the fan curve via the visualized UI interface, meeting their system's cooling performance and noise reduction requirements.

Dragon 2.5 Gb/s LAN
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you’ll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.

More than USB Transfer Speed
Aimed for die hard gamers and enthusiasts! Lightning Gaming Ports are sourced from two different controller interfaces that assist gamers in connecting the high speed mice/keyboard with the lower jitter and latency!

Front USB 3.2 Gen1 Type-C
Front USB 3.2 Gen1 Type-C header delivers up to 5 Gbps data transfer rate and next generation reversible USB design to the front panel of computer case.

Nahimic Audio
Whether you are using headphones, a headset, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio offers you the most engaging listening experience, vibrant and rich with details.

POLYCHROME RGB
This motherboard features onboard RGB headers and addressable RGB headers that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.

SignalRGB
SignalRGB unifies your RGB devices, offering seamless customization, game-reactive effects, macro automation, and system monitoring. The official partnership empowers ASRock motherboards with advanced lighting control, enhances compatibility with a diverse range of RGB devices, and provides greater customization flexibility.

Reinforced Steel Slot [PCIe 5.0 Version]
The reinforced steel slot is capable of supporting PCI Express 5.0 standard. The various benefits include:
- Extra anchor points
- Stronger latch
- Ensure signal stability
- Make sure heavy graphics cards to be well-installed.

EZ Setting
No disk drive or support CD needed. ASRock pre-installs the LAN driver, so when the system connects to the internet for the first time, an ADI pop-up application will appear.
Users can simply install all drivers and software needed with one click—greatly simplifying the setup process.

EZ Installation
Displays the real-time status of CPU, DRAM, VGA, and BOOT device with colored LEDs during startup. A simple and efficient way to check system operation at a glance.

64MB BIOS Ready for Future AM5 Processors
64MB BIOS provides expanded firmware capacity to support future AM5 processors, offering long-term compatibility and enhanced update capability.

M.2 (KEY E) For WiFi
Besides the onboard LAN port, users may also choose wireless connections by M.2 (Key E) slot.

One-Click to AI Agents – ASRock Claw Quickset
ASRock Claw Quickset is a Windows desktop utility that simplifies the deployment of OpenClaw and local AI models. It automates installation, configuration, and environment setup, allowing users to start using AI with minimal technical knowledge.

Specifications

Processor

Processor manufacturerAMD
Processor socketSocket AM5
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Maximum number of SMP processors1

Memory

Supported memory typesDDR5-SDRAM
Number of memory slots4
Memory slots typeDIMM
Memory channelsDual-channel
ECC сompatibilityECC & Non-ECC
Maximum internal memory256 GB
Show all 53 specificationsShow fewer specifications

Storage controllers

Supported storage drive interfacesM.2, SATA III
RAID supportYes
RAID levels0, 1, 10

Internal I/O

USB 2.0 connectors2
USB 3.2 Gen 1 (3.1 Gen 1) connectors1
USB 3.2 Gen 2 (3.1 Gen 2) connectors1
Number of SATA III connectors4
Front panel audio connectorYes
ATX Power connector (24-pin)Yes
CPU fan connectorYes
Number of CPU fan connectors2
Number of chassis fan connectors3
Peripheral (Molex) power connectors (4-pin)1
EPS power connector (8-pin)Yes
Number of EPS power connectors (8-pin)1
RGB LED pin headerYes

Rear panel I/O ports

USB 2.0 ports quantity2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity6
Ethernet LAN (RJ-45) ports1
HDMI ports quantity1
Line-inYes
Headphone outputs1
Microphone inYes

Network

Ethernet LANYes
Ethernet interface type2.5 Gigabit Ethernet
LAN controllerDragon RTL8125BG
Wi-FiNo

Features

Component forPC
Motherboard form factormicro ATX
Motherboard chipset familyAMD
Motherboard chipsetAMD B850
Audio chipRealtek ALC897
Audio output channels7.1 channels
Windows operating systems supportedWindows 10 x64, Windows 11 x64

Expansion slots

PCI Express x1 (Gen 4.x) slots1
PCI Express x16 (Gen 4.x) slots1
PCI Express x16 (Gen 5.x) slots1
Number of M.2 (M) slots1

BIOS

BIOS typeUEFI AMI
BIOS memory size512 Mbit

Weight & dimensions

Width244 mm
Depth244 mm

Packaging content

Cables includedSATA

Manuals & downloads

Delivery & returns

Delivery

  • FREE standard delivery on orders over £50, otherwise £4.95 (3–5 working days).
  • Express delivery £9.99 (1–3 working days) on selected products, UK mainland.
  • PlayStation and Arozzi products use a 5–7 working-day service.
  • Orders are processed within 24 hours, Monday to Friday excluding bank holidays. All deliveries must be signed for.

Returns

  • Changed your mind? Tell us within 14 days of receiving your item, then return it within a further 14 days, unused and in its original packaging. A minimum £9.99 collection fee applies.
  • Faulty or damaged on arrival? Contact us within 48 hours of delivery.
  • Custom-built PCs can only be returned if faulty. Opened headphones, earphones and AirPods can't be returned for hygiene reasons.

Full delivery information · Full returns policy