Mainboard ASROCK AMD B850 SAM5 Micro-ATX Memory DDR5 Memory slots 4 1xPCI-Express 4.0 4x 1xPCI-Express 5.0 16x 1xM.2 1xHDMI 1xDisplayPort 1xAudio-In 1xAudio-Out 1xMicrophone 4xUSB 2.0 3xUSB 3.2 1xUSB-C 1xRJ45 B850MPRO-A

Optimized for stability, durability, and efficiency. It combines reliable performance, user-friendly features and streamlined style for daily computing tasks.

Optimized VRM Design
8+2+1 Power Phase Design
Featuring sturdy components and completely smooth power delivery to the CPU, offering enhanced performance for gamers.

Dr. MOS
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs, it intelligently delivers higher current for each phase, thus providing improved thermal result and superior performance.

Power Connector
Hi-Density Power Connector
CPU overclocking requires higher current. ASRock Hi-Density Power Connectors are designed to withstand higher currents compared to traditional CPU and ATX power connectors, providing a more stable system and reducing the risk of fire during heavy overclocking.

6 Layer PCB
The 6 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus, it's able to support the latest memory modules with most extreme memory performance!

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
PCIe Gen5 Blazing M.2
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.

Hyper M.2 Gen4 x4
Supports PCI Express 4.0 M.2 SSDs, it is capable of perform twice the speed compared to previous 3rd generation, giving a lightning fast data transferring experience.

Cooling
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 A-Tuning 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.

Connectivity
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.

Stylish Design
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.

DIY Friendly
Dual Graphics Outputs
Complete with two types of most used connectors! Packed with a HDMI + DisplayPort combo, you have more graphics output options now.

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
Auto Driver Installer
No need to worry about lack of disk drive! Asrock preinstall LAN driver to ensure that you are able to install all drivers needed in an easier way than using SCD.

BIOS Flashback
Get the most convenient BIOS flashing with just a simple click. Users can easily achieve the latest BIOS support with a USB and a power supply. No CPU, RAM or other components are required.

• Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors
• 8+2+1 Phase Power Design, Dr.MOS for VCore+SOC+MISC
• 4 x DDR5 DIMMs, Supports Dual Channel, up to 8000+ (OC)
• 1 PCIe 5.0 x16, 1 PCIe 4.0 x4
• Graphics Output Options: 1 HDMI, 1 DisplayPort
• Realtek ALC897 7.1 CH HD Audio Codec
• 1 Blazing M.2 (PCIe Gen5x4), 2 Hyper M.2 (PCIe Gen4x4), 4 SATA3
• 1 USB 3.2 Gen2 Type-C (Rear), 1 USB 3.2 Gen2 Type-A (Rear), 1 USB 3.2 Gen1 Type-C (Front), 6 USB 3.2 Gen1 (2 Rear, 4 Front), 8 USB 2.0 (4 Rear, 4 Front)
• Realtek 2.5G LAN
• Supports BIOS Flashback

Summary: Asrock B850M Pro-A. Processor manufacturer: AMD, Processor socket: Socket AM5, Compatible processor series: AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. Supported memory types: DDR5-SDRAM, Maximum internal memory: 256 GB, Memory slots type: DIMM. Supported storage drive interfaces: PCI Express 4.0, PCI Express 5.0, SATA III, Supported storage drive types: HDD & SSD, RAID levels: 0, 1, 10. Maximum resolution: 3840 x 2160 pixels. USB connector type: USB Type-A, USB Type-C | Vendor Homepage: https://www.asrock.com/MB/AMD/B850M%20Pro-A/index.asp | Motherboard chipset: AMD B850 | Audio chip: Realtek ALC897 | Product colour: Black | Component for: PC | Motherboard form factor: micro ATX | Audio output channels: 7.1 | Motherboard chipset family: AMD | Windows operating systems supported: Windows 10 x64/Windows 11 x64 | Certification: FCC, CE, ErP/EuP | Processor manufacturer: AMD | Processor socket: Socket AM5 | Compatible processor series: AMD Ryzen 7000 Series/AMD Ryzen 8000 Series/AMD Ryzen 9000 Series | Supported processor sockets: Socket AM5 | Supported memory types: DDR5-SDRAM | Number of memory slots: 4 | Memory slots type: DIMM | Memory channels: Dual-channel | ECC сompatibility: ECC & Non-ECC | Maximum internal memory: 256 | Unbuffered memory: Yes | Supported storage drive types: HDD & SSD | Supported storage drive interfaces: PCI Express 4.0,PCI Express 5.0,SATA III | Number of storage drives supported: 7 | RAID support: Yes | RAID levels: 0/1/10 | Parallel processing technology support: Not supported | Maximum resolution: 3840 x 2160 | HDCP: Yes | USB 2.0 connectors: 2 | USB 3.2 Gen 1 (3.1 Gen 1) connectors: 3 | Number of SATA III connectors: 4 | Front panel audio connector: Yes | ATX Power connector (24-pin): Yes | CPU fan connector: Yes | Number of CPU fan connectors: 2 | Number of chassis fan connectors: 3 | EPS power connector (8-pin): Yes | Number of EPS power connectors (8-pin): 1 | 12V power connector: Yes | TPM connector: Yes | RGB LED pin header: Yes | Number of RGB LED pin headers: 1 | USB 2.0 ports quantity: 4 | USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity: 2 | USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity: 1 | USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity: 1 | Ethernet LAN (RJ-45) ports: 1 | HDMI ports quantity: 1 | HDMI version: 2.1 | DisplayPorts quantity: 1 | DisplayPort version: 1.4 | Headphone outputs: 3 | Line-in: Yes | Microphone in: Yes | USB connector type: USB Type-A/USB Type-C | Ethernet LAN: Yes | Ethernet interface type: 2.5 Gigabit Ethernet | LAN controller: Dragon RTL8125BG | Wi-Fi: No | PCI Express x4 (Gen 4.x) slots: 1 | PCI Express x16 (Gen 5.x) slots: 1 | Number of M.2 (M) slots: 3 | 1st M.2 largest key size: 2280 | 1st M.2 highest PCI Express generation: 5.0 | 2nd M.2 largest key size: 2280 | 2nd M.2 highest PCI Express generation: 4.0 | 3rd M.2 largest key size: 2280 | 3rd M.2 highest PCI Express generation: 4.0 | BIOS type: UEFI AMI | BIOS memory size: 256 | Width: 244 | Depth: 244 | Cables included: SATA | Screws included: Yes | Unit Calculated Weight: 1.34 | Product Net Weight: 1.3 | Unit Calculated Volume: 0.005406 | Units per Shipping Box: 10 | Unit Width: 26.5 | Shipping Box Height: 32 | Unit Depth: 30 | Unit Height: 6 | Name: MB AMD B850 SAM5 MATX/B850M PRO-A ASROCK | Model: B850M Pro-A