MB AM4 B550M STEEL LEGEND ASROCK 4xDDR4 4733Mhz (O.C), HDMI, DP, PCI-Ex16 4.0, PCI-Ex16 3.0, PCI-Ex1, Hyper M.2, M.2, 4xSATAIII, 2.5G LAN

Model Name: ASROCK B550M STEEL LEGEND

CPU

• Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors*
• Digi Power design
• 10 Power Phase design

Chipset

• AMD B550

Memory

• Dual Channel DDR4 Memory Technology
• 4 x DDR4 DIMM Slots
• Max. capacity of system memory: 128GB**
• Supports Extreme Memory Profile (XMP) memory modules
• 15μ Gold Contact in DIMM Slots

Supported Memory Speeds

• AMD Ryzen series CPUs (Vermeer): 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 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 (Cezanne): 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*
• AMD Ryzen series APUs (Renoir): 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*
• AMD Ryzen series APUs (Picasso): DDR4 3333+(OC) / 3200(OC) / 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory*

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 DisplayPort 1.4 ports by independent display controllers
• Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096×2160) @ 60Hz
• Supports DisplayPort 1.4 with max. resolution up to 5K (5120×2880)@120Hz
• 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 and DisplayPort 1.4 Ports***
• Supports 4K Ultra HD (UHD) playback with HDMI 2.1 and DisplayPort 1.4 Ports
• Supports Microsoft® PlayReady

Audio

• 7.1 CH HD Audio with Content Protection (Realtek ALC1220/ALC1200 Audio Codec)
• Premium Blu-ray Audio support
• Supports Surge Protection
• PCB Isolate Shielding
• Individual PCB Layers for R/L Audio Channel
• Gold Audio Jacks
• Nahimic Audio

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 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)**

LAN

• 2.5 Gigabit LAN 10/100/1000/2500 Mb/s
• Dragon RTL8125BG
• Supports Dragon 2.5G LAN Software
• Smart Auto Adjust Bandwidth Control
• Visual User Friendly UI
• Visual Network Usage Statistics
• Optimized Default Setting for Game, Browser, and Streaming Modes
• User Customized Priority Control
• Supports Wake-On-LAN
• Supports Lightning/ESD Protection
• Supports Energy Efficient Ethernet 802.3az
• Supports PXE

Slots

AMD Ryzen series CPUs (Vermeer and Matisse):

• 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)*

AMD Ryzen series APUs (Cezanne and Renoir):

• 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)*

AMD Ryzen series APUs (Picasso):

• 2 x PCI Express x16 Slots (PCIE1: Gen3x8 mode; PCIE3: Gen3 x4 mode)*

• 1 x PCI Express 3.0 x1 Slot
• Supports AMD Quad CrossFireX™ and CrossFireX™
• 15μ Gold Contact in VGA PCIe Slot (PCIE1)
• 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module

Connector

• 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 (Hi-Density Power Connector)
• 1 x 8 pin 12V Power Connector (Hi-Density Power Connector)
• 1 x 4 pin 12V Power Connector (Hi-Density Power Connector)
• 1 x Front Panel Audio Connector
• 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)

Rear Panel I/O

• 2 x Antenna Mounting Points
• 1 x PS/2 Mouse/Keyboard Port
• 1 x HDMI Port
• 1 x DisplayPort 1.4
• 1 x Optical SPDIF Out 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 (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)
• 1 x Clear CMOS Button
• HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)

Software and UEFI

Software:

• ASRock Motherboard Utility (A-Tuning)
• ASRock Polychrome SYNC*

UEFI:

• ASRock Full HD UEFI
• ASRock Instant Flash

Support CD

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

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

Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm

2oz Copper PCB

OS

Microsoft® Windows® 10 64-bit / 11 64-bit