ASRock B550 Pro4

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

For Ryzen Series CPUs (Picasso), ECC is only supported with PRO CPUs.



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

Actual support may vary by CPU

The Max shared memory 16GB requires 32GB system memory installed.



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

Supports NVMe SSD as boot disks



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)

M2_3 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled.

Supports NVMe SSD as boot disks

Supports ASRock U.2 Kit



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)

Support in total up to 12V/3A, 36W LED Strip

Support in total up to 5V/3A, 15W LED Strip

The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.

The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.

CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP, CHA_FAN3/WP and CHA_FAN4/WP can auto detect if 3-pin or 4-pin fan is in use.



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



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