Asrock B550 PRO4 AM4 ATX motherboard • PMA-B550 PRO4

Unique Features

• USB 3.2 Gen2 Type-A (10 Gb/s)
• USB 3.2 Gen2 Type-C (10 Gb/s)
• XXL Aluminum Alloy heatsink
• Premium 50A power choke
• Sapphire Black PCB
• High-density glass fabric PCB
• 2oz copper PCB
• Steel Slot Gen4
• Full Coverage M.2 Heatsink
• Hyper M.2 (PCIe Gen4 x4)
• POST Status Checker
• Full Spike Protection (USB, Audio, LAN)
• Live Update & APP Shop

CPU

• AMD AM4 Socket
• Supports Ryzen 3000 / 3000G / 4000G / 5000 / 5000G
• Digi Power design
• 8-phase power design

Chipset

AMD B550

Memory

• Dual-channel DDR4
• 4 × DDR4 DIMM slots
• Maximum capacity: 128 GB
• ECC and non-ECC un-buffered memory support (CPU dependent)
• Supports XMP
• 15µ gold-contact DIMM slots

BIOS

• 256 Mb AMI UEFI BIOS
• Plug and Play support
• ACPI 5.1
• SMBIOS 2.3
• Voltage multi-adjustment support

Graphics

• Integrated AMD Radeon Vega Graphics (APUs)
• DirectX 12, Pixel Shader 5.0
• Shared memory up to 16 GB
• HDMI 2.1 (up to 4096×2160 @ 60 Hz)
• D-Sub (up to 1920×1200 @ 60 Hz)
• HDR and HDCP support (CPU dependent)

Audio

• 7.1-channel HD Audio
• Realtek ALC1220 / ALC1200 codec
• Nahimic Audio
• PCB isolation and surge protection

LAN

• Gigabit Ethernet (10/100/1000)
• Realtek RTL8111H
• Wake-on-LAN
• Energy Efficient Ethernet
• PXE support

Expansion Slots

• 2 × PCIe x16 (configuration varies by CPU)
• 2 × PCIe 3.0 x1
• M.2 Key-E slot for Wi-Fi / Bluetooth
• CrossFireX support

Storage

• 6 × SATA 6 Gb/s (RAID 0/1/10)
• 1 × Hyper M.2 (PCIe Gen4 x4 or Gen3 x4)
• 1 × M.2 (PCIe Gen3 x2 or SATA)
• NVMe boot support (CPU dependent)

Internal Connectors

• 24-pin ATX power
• 8-pin + 4-pin CPU power
• CPU fan and water pump headers
• 4 × chassis / pump fan headers
• RGB and addressable RGB headers
• USB 3.2 Gen1 and USB 2.0 headers
• TPM header

Rear Panel I/O

• PS/2 keyboard/mouse
• D-Sub
• HDMI
• USB 3.2 Gen2 Type-A
• USB 3.2 Gen2 Type-C
• 4 × USB 3.2 Gen1
• RJ-45 LAN
• Audio jacks

Software and UEFI

• ASRock A-Tuning
• ASRock Polychrome SYNC
• Full HD UEFI
• Instant Flash

Accessories

• I/O shield
• 2 × SATA cables
• M.2 screws and standoff

Hardware Monitoring

• Temperature monitoring
• Fan speed monitoring
• Quiet Fan and multi-speed control
• Voltage monitoring

Form Factor

• ATX (30.5 × 24.4 cm)
• Solid capacitor design
• 2oz copper PCB

Operating System

Windows 10 64-bit, Windows 11 64-bit

Certifications

• FCC
• CE
• ErP / EuP ready