ASRock B550M Pro4 AMD AM4 Socket Motherboard, Micro-ATX, 4x DDR4 Slots, 2x M.2 Sockets, GbE LAN, 1x D-Sub / 1x DisplayPort / 1x HDMI Port

ASRock B550 Micro ATX Motherboard

High-performance AMD AM4 motherboard designed for 3rd Gen Ryzen and future AMD Ryzen processors, featuring robust power delivery, fast storage support, rich connectivity, and immersive audio.

Key Features

• CPU Support
• Supports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen processors
• Digi Power design with 8 Power Phase Design for smooth CPU power delivery

• Not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G

• Audio

• 7.1 CH HD Audio with Content Protection (Realtek ALC1200 Audio Codec)
• Nahimic Audio for detailed, immersive sound via headphones, headsets, speakers, USB, Wi-Fi, analog, or HDMI
• Premium Blu-ray Audio support

• Surge Protection, PCB Isolate Shielding, and individual PCB layers for R/L audio channels

• Graphics & Display

• Integrated AMD Radeon Vega Series Graphics support (with Ryzen Series APUs)
• Triple monitor support with three outputs:
  • D-Sub
  • HDMI 2.1 (up to 4K x 2K 4096x2160 @ 60Hz)
  • DisplayPort 1.4 (up to 5K 5120x2880 @ 120Hz)
• Supports DirectX 12, Pixel Shader 5.0
• Max shared memory up to 16GB (default 2GB)
• HDMI 2.1 features: Auto Lip Sync, Deep Color (12bpc), xvYCC, HBR audio, HDR, HDCP 2.3, 4K UHD playback
• 4K Ultra HD playback via HDMI 2.1 and DisplayPort 1.4

• Supports Microsoft PlayReady

• Memory

• Dual Channel DDR4 memory technology
• 4 x DDR4 DIMM slots, up to 128GB total capacity
• AMD Ryzen series CPUs (Matisse):
  • DDR4 4533+(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133
  • ECC & non-ECC, un-buffered memory
• AMD Ryzen series APUs:
  • DDR4 4733+(OC) / 4666(OC) / 4600(OC) / 4533(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133
  • ECC & non-ECC, un-buffered memory
• Supports Extreme Memory Profile (XMP) memory modules

• 15µ Gold Contact in DIMM Slots

• Power & PCB Design

• 8 Power Phase Design with sturdy components for stable power and enhanced overclocking with low temperatures
• Premium 50A Power Choke for improved Vcore voltage and up to three times better saturation current than traditional chokes
• 2oz Copper PCB inner layers for stable signal traces, lower temperatures, and higher energy efficiency

• Supports the latest DDR4 modules for extreme memory performance

• ASRock Super Alloy Features

• XXL Aluminum Alloy Heatsink
• Premium 50A Power Choke
• Sapphire Black PCB
• High Density Glass Fabric PCB

• 2oz Copper PCB

• Expansion Slots

• AMD Ryzen series CPUs (Matisse):
  • 2 x PCI Express x16 (PCIE1: Gen4 x16, PCIE3: Gen3 x4)
• AMD Ryzen series APUs:
  • 2 x PCI Express x16 (PCIE1: Gen3 x16, PCIE3: Gen3 x4)
• 1 x PCI Express 3.0 x1 slot
• Supports AMD Quad CrossFireX and CrossFireX
• ASRock Steel Slot Gen4 reinforcement

• 1 x M.2 Socket (Key E) for type 2230 WiFi/BT module

• Storage

• 6 x SATA3 6.0 Gb/s connectors
  • Supports RAID 0, 1, 10, NCQ, AHCI, and Hot Plug
• 1 x Hyper M.2 Socket (M2_1)
  • M Key type 2280 PCIe module up to Gen4 x4 (64 Gb/s) with Matisse
  • Up to Gen3 x4 (32 Gb/s) otherwise
• 1 x M.2 Socket (M2_2)
  • M Key type 2280 M.2 SATA3 6.0 Gb/s module
  • M.2 PCIe module up to Gen3 x2 (16 Gb/s)
• ASRock Full Coverage M.2 Heatsink

• ASRock Hyper M.2 (PCIe Gen4x4)

• USB & Connectivity

• Rear USB:
  • 1 x USB 3.2 Gen2 Type-A (10 Gb/s)
  • 1 x USB 3.2 Gen2 Type-C (10 Gb/s)
  • 4 x USB 3.2 Gen1 (ASMedia ASM1074 hub)
  • 2 x USB 2.0
• Internal USB Headers:
  • 2 x USB 3.2 Gen1 headers (up to 4 ports)
  • 2 x USB 2.0 headers (up to 4 ports)
• ASRock USB 3.2 Gen2 support on Type-A and Type-C ports

• All USB ports with ESD protection

• Networking

• Realtek Gigabit LAN (Realtek RTL8111H)
• 10/100/1000 Mb/s PCIE x1 Gigabit LAN
• Supports Wake-On-LAN
• Lightning/ESD Protection
• Energy Efficient Ethernet 802.3az support

• PXE support

• Lighting & Cooling Connectivity

• 2 x RGB LED headers
• 2 x Addressable LED headers
• 1 x CPU Fan connector (4-pin)
• 1 x CPU/Water Pump Fan connector (4-pin, Smart Fan Speed Control)

• 4 x Chassis/Water Pump Fan connectors (4-pin, Smart Fan Speed Control)

• Monitoring & Control

• Temperature sensing: CPU, CPU/Water Pump, Chassis/Water Pump fans
• Fan tachometer for CPU, CPU/Water Pump, Chassis/Water Pump fans
• Quiet Fan: Auto-adjust chassis fan speed by CPU temperature
• Fan multi-speed control for all fan headers

• Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, VDDP

• Protection & Utilities

• ASRock POST Status Checker (PSC)
• ASRock Full Spike Protection (USB, Audio, LAN ports)
• ASRock Live Update & APP Shop
• ASRock Motherboard Utility (A-Tuning)
• ASRock XFast LAN

Rear I/O Panel

• Antenna bracket
• 1 x PS/2 mouse/keyboard port
• 1 x D-Sub port
• 1 x HDMI port
• 1 x DisplayPort 1.4
• 1 x USB 3.2 Gen2 Type-A port (10 Gb/s)
• 1 x USB 3.2 Gen2 Type-C port (10 Gb/s)
• 4 x USB 3.2 Gen1 ports
• 2 x USB 2.0 ports
• 1 x RJ-45 LAN port with ACT/LINK and SPEED LEDs
• HD Audio jacks: Line In / Front Speaker / Microphone

Internal Headers & Connectors

• 1 x COM port header
• 1 x SPI TPM header
• 1 x Power LED and Speaker header
• 2 x RGB LED headers
• 2 x Addressable LED headers
• 1 x 24-pin ATX power connector
• 1 x 8-pin 12V power connector
• 1 x Front Panel Audio connector

BIOS & UEFI

• 256Mb AMI UEFI Legal BIOS with GUI support
• Supports Plug and Play
• ACPI 5.1 compliance wake up events
• Jumperfree configuration
• SMBIOS 2.3 support
• CPU, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP voltage multi-adjustment
• ASRock Full HD UEFI
• ASRock Instant Flash

Chipset

• AMD B550 chipset

Form Factor & Design

• Micro ATX form factor: 9.6" x 9.6" (24.4 cm x 24.4 cm)
• Solid Capacitor design
• 2oz Copper PCB

Software & Support CD

• ASRock Motherboard Utility (A-Tuning)
• ASRock XFast LAN
• Support CD including:
• Drivers
• Utilities
• AntiVirus software (trial version)
• Google Chrome browser and toolbar

Included Accessories

• Quick Installation Guide
• Support CD
• I/O Shield
• 2 x SATA data cables
• 2 x screws for M.2 sockets

Operating System & Certifications

• OS Support: Microsoft Windows 10 64-bit
• Certifications: FCC, CE
• ErP/EuP ready (requires ErP/EuP ready power supply)

Specifications Table