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| Basic Information | ||
| Supported 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 |
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| Chipset | AMD B550 | |
| Form Factor | Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm 2oz Copper PCB |
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| 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 |
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| 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 |
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| Expansion Slots | ||
| PCI | 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 |
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| Memory | ||
| Type | DDR4 | |
| Slots | 4 x DIMM Slots | |
| Supported Memory | AMD Ryzen series CPUs (Vermeer) 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 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 (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 3333+(OC) / 3200(OC) / 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory* Supports Extreme Memory Profile (XMP) memory modules 15μ Gold Contact in DIMM Slots |
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| Maximum Memory | 128GB | |
| Graphics | ||
| Graphics | - Integrated AMD Radeon Vega Series Graphics in Ryzen Series APU - DirectX 12, Pixel Shader 5.0 - 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 (4096x2160) @ 60Hz - Supports DisplayPort 1.4 with max. resolution up to 5K (5120x2880)@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 |
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| Others | Shared memory default 2GB. Max Shared memory supports up to 16GB | |
| Connector & Ports | ||
| HDMI | 1 x HDMI Port | |
| USB (s) | 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) |
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| LAN Port (s) | 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 |
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| Supported 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) |
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| Audio | HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks) | |
| Internal I/O Ports | 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) |
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| TPM (Trusted Platform Module ) | 1 x SPI TPM Header | |
| Others | ||
| Special 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 - 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 POST Status Checker (PSC) ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update & APP Shop |
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| Bundled Software | Software - ASRock Motherboard Utility (A-Tuning) - ASRock Polychrome SYNC* UEFI - ASRock Full HD UEFI - ASRock Instant Flash |
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| Warranty Details | ||
| Warranty Details | 03 years | |
The ASRock B550M Steel Legend AMD AM4 Micro-ATX Motherboard is designed for gamers, PC builders, and content creators who demand durable performance, future-ready features, and fast connectivity. Built on the AM4 platform, it supports a wide range of processors including Ryzen 3000, 3000 G, 4000 G, 5000, and 5000 G-Series, making it ideal for both current and next-generation builds.
Equipped with 4 DDR4 slots supporting up to 128GB at 4733+ MHz (OC), the Steel Legend provides high-speed memory performance for gaming, multitasking, and productivity. For graphics output, it offers HDMI and DisplayPort, allowing flexibility for high-resolution displays and multi-monitor setups.
Gamers and streamers will benefit from Dragon 2.5G LAN, delivering ultra-fast, low-latency wired network connections for competitive gaming and smooth online performance. With robust build quality, Micro-ATX compact design, and extensive connectivity, the B550M Steel Legend combines reliability, speed, and style in one feature-rich motherboard.
CPU Compatibility: Supports Ryzen 3000, 3000 G, 4000 G, 5000, and 5000 G-Series processors
Memory Support: 4 × DDR4 slots, up to 128GB at 4733+ MHz (OC) for high-speed performance
Graphics Outputs: 1 × HDMI, 1 × DisplayPort for versatile display setups
Networking: Dragon 2.5G LAN for fast, low-latency wired connectivity
Form Factor: Micro-ATX for compact yet powerful builds
Durability: Steel-reinforced design and high-quality components for long-lasting performance
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