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ASRock B550M Steel Legend

B550 · AM4 · Micro-ATX
ASRock B550M Steel Legend product image

General

ChipsetB550
SocketAM4
Form FactorMicro-ATX
Supported CPU FamiliesRyzen 3000, Ryzen 4000G, Ryzen 5000, Ryzen 5000G

Highlights

Memory4× DDR4 · max 128 GB · 4733 MT/s
M.2 Slots2×
GPU Slots2× x16 · PCIe 4.0
Fastest USBUSB 10 Gbps
NetworkLAN 2.5 Gbps
Power Stages4+2 phases · 50 A

Manufacturer Links

BIOS downloads ↗CPU support list ↗Driver downloads ↗Memory QVL ↗
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Memory

Memory TypeDDR4
Max RAM Speed4733 MT/s
Max RAM128 GB
DIMM Slots4
RAM Form FactorDIMM
ECC SupportYes

Expansion and Storage

PCIe Version4.0
PCIe x16 Slots2
PCIe x1 Slots1
PCIe Slot Modes
1× PCIe 4.0 x16
1× PCIe 3.0 x16 · electrical: x4
1× PCIe 3.0 x1
M.2 Slots
M.2_1: PCIe 4.0 x4
M.2_2: PCIe 3.0 x2 · SATA supported
SATA Ports6
Highest USBUSB 10 Gbps
RAID0/1/10

Power Delivery (VRM)

Phase Layout4+2
CPU Phases4
SoC Phases2
Amps per Phase50 A
PWM ControlleruP9505S (max. 6 phases)
MOSFET8x 50A SiC654 (DrMOS)

Connectivity and Audio

Audio CodecRealtek ALC1200
LAN ChipRealtek RTL8125BG (2.5Gb/s)
Rear I/O
2× USB 2.0 Type-A
4× USB 5Gbps Type-A
1× USB 10Gbps Type-A
1× USB 10Gbps Type-C
1× HDMI
1× DisplayPort
1× 2.5 Gbps LAN
2× Wi-Fi antenna connector
5× Audio jacks (3.5 mm)
1× S/PDIF optical out
1× PS/2
Front Panel Headers
4× USB 2.0
4× USB-A 5Gbps
HD Audio (front audio)
Case Fan Headers
1× 4-pin PWM fan
5× Pump (liquid cooling)
RGB Header
2× ARGB (5V 3-pin)
2× RGB (12V 4-pin)
RGB Zones
RGB
2 zones (chipset heatsink, I/O cover)
TPM HeaderYes
BIOS Chip32 MB
Dual BIOSNo
Special Features
Audio+solid capacitors
Diagnostic LED (LED indicators)
I/O-shield integrated
White Build-compatible (PCB primarily black)
1x M.2 passive heatsink
supports AMD 2-Way-CrossFireX (x16/x4)