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ASROCK • B550 STEEL LEGEND • DDR4 • ATX Motherboard • Black & White

– Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors
– 1 PCIe 4.0 x16, 1 PCIe 3.0 x16, 2 PCIe 3.0 x1, 1 M.2 Key E for WiFi
– 7.1 CH HD Audio (Realtek ALC1220 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), 5 USB 3.2 Gen1 (2 Front, 2 Rear, 1 Front Type-C)
– Dragon 2.5G LAN

14,259.00

Return available within 7 days

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Availability: In stock
SKU: ASR-STB550-D4
Weight 1.3 kg
Dimensions 24 × 31 cm
Memory Type

Motherboard Form Factor

Processor Socket

Processor Support

, , , ,

Motherboard chipset

AMD B550

RAM Capacity (Max)

128 GB

Max. RAM Slot

4

Memory Speed (Mhz)

– Dual Channel DDR4 Memory Technology – 4 x DDR4 DIMM Slots – AMD Ryzen series CPUs (Vermeer) 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* – AMD Ryzen series CPUs (Matisse) 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* – AMD Ryzen series APUs (Cezanne) 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* – AMD Ryzen series APUs (Renoir) 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* – AMD Ryzen series APUs (Picasso) support DDR4 3600+(OC) / 3466(OC) / 3200(OC) / 2933 / 2667 / 2400 / 2133 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 APUs (Picasso, Cezanne and Renoir), ECC is only supported with PRO CPUs.

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 2230/2242/2260/2280 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 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)** *M2_2 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 NVMe SSD is not supported with AMD Athlon™ 3000G Processors Supports ASRock U.2 Kit

Expansion Slot

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)* – 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 PCIe WiFi module – 15μ Gold Contact in VGA PCIe Slot (PCIE1) *Supports NVMe SSD as boot disks

USB

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)

Connectivity

Gigabit LAN 10/100/1000 Mb/s, Dragon RTL8125BG

Audio

– 7.1 CH HD Audio with Content Protection (Realtek ALC1220 Audio Codec) – Premium Blu-ray Audio support – Supports Surge Protection – 120dB SNR DAC with Differential Amplifier – NE5532 Premium Headset Amplifier for Front Panel Audio Connector (Supports up to 600 Ohm headsets) – Pure Power-In – Direct Drive Technology – PCB Isolate Shielding – Impedance Sensing on Rear Out port – Individual PCB Layers for R/L Audio Channel – Gold Audio Jacks – 15μ Gold Audio Connector – Nahimic Audio

Back Panel Connectors

– 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) – 2 x USB 3.2 Gen1 Ports (Supports ESD Protection) – 4 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: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks) *Ultra USB Power is supported on USB_34 ports. ACPI wake-up function is not supported on USB_34 ports.

Internal I/O

– 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)**** – 5 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 (15μ Gold 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) – 1 x Front Panel Type C USB 3.2 Gen1 Header (Supports ESD Protection) – 1 x Dr. Debug with LED *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. ****CPU_FAN2/WP_3A supports the water cooler fan of maximum 3A (36W) fan power. *****The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power. ******CPU_FAN2/WP_3A, CHA_FAN1/WP, CHA_FAN2/WP, CHA_FAN3/WP, CHA_FAN4/WP and CHA_FAN5/WP can auto detect if 3-pin or 4-pin fan is in use.

H/W Monitoring

– 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, CPU VDD 1.8V

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, VTT_DDR Offset, CPU VDD 1.8 Voltage Multi-adjustment

Unique Features

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 60A Power Choke – 50A Dr.MOS – Premium Memory Alloy Choke (Reduces 70% core loss compared to iron powder choke) – Nichicon 12K Black Caps (100% Japan made high quality conductive polymer capacitors) – I/O Armor – Matte Black PCB – High Density Glass Fabric PCB – 2oz Copper PCB 2.5G LAN ASRock Steel Slot Gen4 ASRock Full Coverage M.2 Heatsink ASRock Hyper M.2 (PCIe Gen4x4) ASRock Ultra USB Power ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update & APP Shop

Bundled Software

ASRock Motherboard Utility (A-Tuning), ASRock Dragon 2.5G LAN Software, ASRock Polychrome SYNC, ASRock Full HD UEFI, ASRock Instant Flash

OS compatability

Support for Windows 10 64-bit, Support for Windows 11 64-bit

Warranty (yrs)

3

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