| Seller/manufacturer warranty | 36 months. |
| Type | motherboard |
| Model | ASRock B550M Steel Legend |
| Series | ASRock Steel Legend |
| Color | black |
| Release year | 2020 |
| Form factor | Micro-ATX |
| Height | 244 mm |
| Width | 244 mm |
| Socket | AM4 |
| AMD Chipset | AMD B550 |
| Compatible AMD processor cores | Cezanne, Matisse, Matisse 2, Picasso, Renoir, Vermeer |
| Supported memory type | DDR4 |
| Supported memory form factor | DIMM |
| Number of memory slots | 4 |
| Number of memory channels | 2 |
| Maximum memory | 128 GB |
| Maximum memory frequency (JEDEC / non-overclocked) | 3200 MHz |
| Overclocked RAM frequency | 3466 MHz, 3600 MHz, 3733 MHz, 3800 MHz, 3866 MHz, 4000 MHz, 4133 MHz, 4200 MHz, 4266 MHz, 4333 MHz, 4400 MHz, 4466 MHz, 4533 MHz, 4600 MHz, 4666 MHz, 4733 MHz |
| PCI Express Version | 4.0 |
| PCIe x16 slots | 1 x PCIe 3.0 (in x4 mode), 1 x PCIe 4.0 (in x16 mode) |
| SLI/CrossFire support | CrossFire X |
| Number of cards in SLI / Crossfire | 2 pcs. |
| Number of PCI-E x1 slots | 1 |
| NVMe support | yes |
| PCI Express drive version | 4.0 |
| Number of M.2 connectors | 2 |
| M.2 (M) slots, PCIe processor lines | 1 x 2280 (PCIe 4.0 x4) |
| M.2 (M) slots, PCIe chipset lines | 1 x 2280 (SATA/PCIe 3.0 x2) |
| Number of SATA ports | 6 |
| SATA RAID operating mode | 0, 1, 10 |
| Other drive connectors | no |
| USB Type-A Ports | 1 x USB 3.2 Gen 2, 2 x USB 2.0, 4 x USB 3.2 Gen 1 |
| USB Type-C ports | 1 x USB 3.2 Gen 2 |
| Video outputs | 1 x DisplayPort |
| Number of network ports (RJ-45) | 1 |
| Number of analog audio connectors | 5 |
| Digital audio ports (S/PDIF) | TOSLINK (S/PDIF optical) |
| SMA connectors (for Wi-Fi antenna) | yes |
| PS/2 ports | combo |
| Internal USB Type-A connectors | 2 x USB 2.0 (9 pin), 2 x USB 3.2 Gen 1 (19 pin) |
| Internal USB Type-C connectors | no |
| CPU cooling power connectors | 1 x 4 pin (cooler), 1 x 4 pin (cooler/pump) |
| Combined connectors for fans and LSS pump (4 pin) | 4 |
| Case fan headers (3 pin) | no |
| Connectors 5V-D-G (3 pin) for ARGB backlight | 2 |
| Connectors 12V-G-R-B (4 pin) for RGB backlight | 2 |
| M.2 (E) connector for wireless modules | yes |
| RS-232 (COM) connector | no |
| LPT interface | no |
| Sound design | 7.1 |
| Sound adapter chipset | Realtek ALC1200 |
| Network adapter speed | 2.5 Gbps |
| Network adapter | Realtek RTL8125BG |
| Wi-Fi standard | no |
| Bluetooth version | no |
| Wireless adapter | no |
| Main power connector | 24 pin |
| CPU power connector | 8 pin + 4 pin |
| Number of power phases | 10 |
| Passive cooling | 1 x M.2 slot, VRM zone, chipset |
| Active cooling | no |
| Buttons on board | Clear CMOS Button |
| Illumination of board elements | yes |
| Backlight Sync Software | ASRock Polychrome SYNC |
| Additional features | 4 fan power connectors combined with pump power supply |
| Contents | 2 x SATA cable, software disk, documentation, fasteners for M.2 connector |
| Weight with box | 1.66 kg |
| Country of origin | Vietnam |
| Case fan headers (4 pin) | no |
| Smartphone app | no |
| Box length | 31 cm |
| Box width | 28.5 cm |
| Box height | 7 cm |
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