ASRock B550 Pro4 ATX Motherboard for AMD Ryzen Processors

The ASRock B550 Pro4 delivers robust performance for AMD Ryzen builds with its ATX form factor and comprehensive feature set. Designed for 3rd Gen AMD AM4 Ryzen processors and future AMD Ryzen CPUs, this motherboard combines PCIe 4.0 support with reliable power delivery for gaming and productivity workloads.

Power Delivery and Performance

The 8-phase Digi Power design with premium 50A power chokes provides stable voltage delivery to your CPU, supporting overclocking capabilities while maintaining lower temperatures. The 2oz copper PCB construction ensures reliable signal integrity and enhanced thermal performance, particularly beneficial when pushing DDR4 memory to higher speeds up to 4733+ MHz (OC).

Expansion and Connectivity

Equipped with PCIe 4.0 x16 slot for the latest graphics cards, the B550 Pro4 offers maximum bandwidth for high-performance GPUs. Two M.2 sockets accommodate NVMe SSDs - one Hyper M.2 supporting PCIe Gen4 x4 speeds up to 64 Gb/s, plus an additional M.2 socket supporting both PCIe Gen3 x2 and SATA3. Six SATA3 ports provide ample storage expansion with RAID support.

The rear I/O includes USB 3.2 Gen2 Type-A and Type-C ports delivering 10 Gb/s transfer speeds, four USB 3.2 Gen1 ports, and Gigabit Ethernet with Realtek RTL8111H controller. All USB, audio, and LAN ports feature ASRock Full Spike Protection for enhanced durability.

Memory and Graphics

Four DDR4 DIMM slots support up to 128GB of system memory with speeds reaching DDR4 4733+ when overclocked. The slots feature 15µ gold contacts for improved connectivity and support both ECC and non-ECC unbuffered memory modules with XMP profiles.

Integrated graphics output through HDMI 2.1 and D-Sub ports support Ryzen APUs, with the HDMI port capable of 4K resolution at 60Hz with HDR and HDCP 2.3 support.

Audio and Cooling

Realtek ALC1200 audio codec delivers 7.1 channel HD audio with Nahimic Audio enhancement, featuring PCB isolate shielding and individual layers for left and right audio channels to minimize interference.

Smart fan speed control across six 4-pin fan headers (including CPU, CPU/Water Pump, and four Chassis/Water Pump connectors) enables flexible cooling configurations. The motherboard monitors temperatures and voltages in real-time, allowing automatic fan curve adjustments.

Windows 11 Ready

Certified for Windows 11 compatibility, the B550 Pro4 includes a 256Mb AMI UEFI BIOS with graphical interface, ASRock Instant Flash for easy updates, and Polychrome SYNC RGB lighting control through two RGB LED headers and two addressable LED headers.

WINDOWS 11 READY

Supports 3rd Gen AMD AM4 Ryzen / Future AMD Ryzen Processors
8 Power Phase Design, Digi Power
Supports DDR4 4733+ (OC)
1 PCIe 4.0 x16, 1 PCIe 3.0 x16, 2 PCIe 3.0 x1, 1 M.2 Key E for WiFi
Graphics Output Options: HDMI, D-Sub
AMD CrossFireX
7.1 CH HD Audio (Realtek ALC1200 Audio Codec), Nahimic Audio
6 SATA3, 1 Hyper M.2 (PCIe Gen4 x4), 1 M.2 (PCIe Gen3 x2 & SATA3)
2 USB 3.2 Gen2 (Rear Type A+C), 6 USB 3.2 Gen1 (2 Front, 4 Rear)
Gigabit LAN

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.

8 Power Phase Design
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.

Premium 50A Power Choke
Compared to traditional chokes, ASRock's premium 50A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

2oz Copper PCB
2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking, it's able to support the latest DDR4 memory modules with most extreme memory performance!

Specifications

Unique Feature
ASRock USB 3.2 Gen2
- ASRock USB 3.2 Gen2 Type-A Port (10 Gb/s)
- ASRock USB 3.2 Gen2 Type-C Port (10 Gb/s)
ASRock Super Alloy
- XXL Aluminum Alloy Heatsink
- Premium 50A Power Choke
- Sapphire Black PCB
- High Density Glass Fabric PCB
- 2oz Copper PCB
ASRock Steel Slot Gen4
ASRock Full Coverage M.2 Heatsink
ASRock Hyper M.2 (PCIe Gen4x4)
ASRock POST Status Checker (PSC)
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Shop

CPU
Supports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen Processors
Digi Power design
8 Power Phase design
Not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G

Chipset
AMD B550

Memory
Dual Channel DDR4 Memory Technology
4 x DDR4 DIMM Slots
AMD Ryzen series CPUs (Matisse) support 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 support 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
Max. capacity of system memory: 128GB
Supports Extreme Memory Profile (XMP) memory modules
15µ Gold Contact in DIMM Slots

BIOS
256Mb AMI UEFI Legal BIOS with GUI support
Supports "Plug and Play"
ACPI 5.1 compliance wake up events
Supports jumperfree
SMBIOS 2.3 support
CPU, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustment

Graphics
Integrated AMD Radeon Vega Series Graphics in Ryzen Series APU
DirectX 12, Pixel Shader 5.0
Shared memory default 2GB. Max Shared memory supports up to 16GB.
Dual graphics output: support HDMI and D-Sub ports by independent display controllers
Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096x2160) @ 60Hz
Supports D-Sub with max. resolution up to 1920x1200 @ 60Hz
Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 2.1 Port (Compliant HDMI monitor is required)
Supports HDR (High Dynamic Range) with HDMI 2.1
Supports HDCP 2.3 with HDMI 2.1 Port
Supports 4K Ultra HD (UHD) playback with HDMI 2.1 Port
Supports Microsoft PlayReady

Audio
7.1 CH HD Audio with Content Protection (Realtek ALC1200 Audio Codec)
Premium Blu-ray Audio support
Supports Surge Protection
PCB Isolate Shielding
Individual PCB Layers for R/L Audio Channel
Nahimic Audio

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

Slots
AMD Ryzen series CPUs (Matisse)
- 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)
AMD Ryzen series APUs
- 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)
- 2 x PCI Express 3.0 x1 Slots
- Supports AMD Quad CrossFireX and CrossFireX
- 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module

Storage
6 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug
1 x Hyper M.2 Socket (M2_1), supports M Key type 2260/2280/22110 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Matisse) or Gen3x4 (32 Gb/s)
1 x M.2 Socket (M2_3), supports M Key type 2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)

Connector
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 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)
1 x 24 pin ATX Power Connector
1 x 8 pin 12V Power Connector
1 x 4 pin 12V Power Connector
1 x Front Panel Audio Connector
2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)

Rear Panel I/O
Antenna Bracket
1 x PS/2 Mouse/Keyboard Port
1 x D-Sub Port
1 x HDMI Port
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection)
4 x USB 3.2 Gen1 Ports (Supports ESD Protection)
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jacks: Line in / Front Speaker / Microphone

Software and UEFI
Software
- ASRock Motherboard Utility (A-Tuning)
- ASRock Polychrome SYNC
- ASRock XFast LAN
UEFI
- ASRock Full HD UEFI
- ASRock Instant Flash

Support CD
Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar

Accessories
Quick Installation Guide, Support CD, I/O Shield
2 x SATA Data Cables
3 x Screws for M.2 Sockets
1 x Standoff for M.2 Socket

Hardware Monitor
Temperature Sensing: CPU, CPU/Water Pump, Chassis/Water Pump Fans
Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water Pump Fans
Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU/Water Pump, Chassis/Water Pump Fans
Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/Water Pump Fans
Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, VDDP

Form Factor
ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm
Solid Capacitor design
2oz Copper PCB

OS
Microsoft Windows 10 64-bit

Certifications
FCC, CE
ErP/EuP ready (ErP/EuP ready power supply is required)

• Socket: AM4
• CPU Compatibility: AMD Ryzen
• Chipset: AMD B550
• Form Factor: ATX
• Memory Slots: DDR4 - 4 Slots
• M.2 Compatibility: NVMe / SATA
• USB C: Yes