Learn more about ASRock B550M PRO4

Model
Brand
ASRock
Model
B550M PRO4
Supported CPU
CPU Socket Type
AM4
CPU Type
Supports AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series / 3000 G-Series Processors** Not compatible with AMD Athlon Processors.* BIOS update might require for AMD Zen 3 Ryzen 5000 Series CPU. Refer to ASRock website for CPU support list.
Chipsets
Chipset
AMD B550
Memory
Number of Memory Slots
4x288pin (DDR4)
Memory Standard
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 (AMD Ryzen series APUs (Cezanne & Renoir))*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 (AMD Ryzen series CPUs (Vermeer & Matisse))*DDR4 3333+(OC) / 3200(OC) / 2933 / 2667 / 2400 / 2133 (AMD Ryzen series APUs (Picasso))** For Ryzen Series APUs (Picasso, Cezanne and Renoir), ECC is only supported with PRO CPUs.
Maximum Memory Supported
128GB
Channel Supported
Dual Channel
ECC Supported
ECC supported varies by processors
Buffer Supported
Un-buffered
Expansion Slots
PCI Express 4.0 x16
1 x PCI Express 4.0 x16** Supports NVMe SSD as boot disks.* Actual support may vary by CPU.
PCI Express 3.0 x16
1 x PCI Express 3.0 x16** Supports NVMe SSD as boot disks.
PCI Express x1
1 x PCI Express 3.0 x1
Other Slots
1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module
Storage Devices
SATA 6Gb/s
6 x SATA3 6.0Gb/s** M2_2 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled.
M.2
1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Vermeer, Matisse) or Gen3x4 (32 Gb/s) (with Cezanne, Renoir and Picasso)*1 x M.2 Socket (M2_2), supports M Key type 2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)** Supports NVMe SSD as boot disks.* Supports ASRock U.2 Kit.
SATA RAID
0/1/10
Onboard Video
Onboard Video Chipset
Supported only by CPU with integrated graphic
Onboard Audio
Audio Chipset
Realtek ALC1200
Audio Channels
7.1 Channels
Onboard LAN
LAN Chipset
Realtek RTL8111H
Max LAN Speed
1Gbps
Rear Panel Ports
Back I/O Ports
Antenna Bracket1 x PS/2 Mouse/Keyboard Port1 x D-Sub Port1 x HDMI Port1 x DisplayPort 1.41 x USB 3.2 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection)4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports ESD Protection)2 x USB 2.0 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
Internal I/O Connectors
Onboard USB
2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports) (Supports ESD Protection)
Other Connectors
1 x COM Port Header1 x SPI TPM Header1 x Power LED and Speaker Header2 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 Front Panel Audio Connector* 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.
Physical Spec
Form Factor
Micro ATX
LED Lighting
RGB
Dimensions (W x L)
9.6" x 9.6"
Power Pin
1 x 24-pin ATX Power Connector1 x 8-pin 12V Power Connector
Windows 11 Compatibility
Windows 11
Supported
Features
Features
Unique Feature:ASRock USB 3.2 Gen2- ASRock USB 3.2 Gen2 Type-A Port (10Gb/s)- ASRock USB 3.2 Gen2 Type-C Port (10Gb/s)ASRock Super Alloy- XXL Aluminum Alloy Heatsink- Premium 50A Power Choke- Sapphire Black PCB- High Density Glass Fabric PCB- 2oz Copper PCBASRock Steel Slot Gen4ASRock Full Coverage M.2 HeatsinkASRock Hyper M.2 (PCIe Gen4x4)ASRock POST Status Checker (PSC)ASRock Full Spike Protection (for all USB, Audio, LAN Ports)ASRock Live Update & APP ShopBIOS:- 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-adjustmentSoftware and UEFI:Software- ASRock Motherboard Utility (A-Tuning)- ASRock XFast LANUEFI- ASRock Full HD UEFI- ASRock Instant Flash* These utilities can be downloaded from ASRock Live Update & APP Shop.Support CD:- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and ToolbarHardware 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, VDDPOS:- Microsoft Windows 10 64-bit / 11 64-bitCertifications:- FCC, CE- ErP/EuP ready (ErP/EuP ready power supply is required)
Packaging
Package Contents
Accessories:Quick Installation Guide, Support CD, I/O Shield2 x SATA Data Cables2 x Screws for M.2 Sockets
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