| Brand | ASRock |
| Model | B450M Steel Legend |
| CPU Socket Type | AM4 |
| CPU Type | Ryzen Series |
| Chipset | AMD Promontory B450 |
| Number of Memory Slots | 4x288pin |
| Memory Standard | AMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3533+(OC)/ 3200(OC)/ 2933(OC)/ 2667/2400/2133 ECC & non-ECC, un-buffered memory*AMD Ryzen series CPUs (Picasso) support DDR4 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory*AMD Ryzen series CPUs (Summit Ridge) support DDR4 3466+(OC)/ 3200(OC)/ 2933(OC)/ 2667/2400/2133 ECC & non-ECC, un-buffered memory*AMD Ryzen series CPUs (Raven Ridge) support DDR4 3466+(OC)/ 3200(OC)/ 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory** For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only supported with PRO CPUs. |
| Maximum Memory Supported | 64GB** Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation. |
| Channel Supported | Dual Channel |
| PCI Express 3．0 x16 | AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge)- 1 x PCI Express 3.0 x16 Slot (PCIE2: x16 mode)*AMD Ryzen series CPUs (Picasso, Raven Ridge)- 1 x PCI Express 3.0 x16 Slot (PCIE2: x8 mode) (If you use Athlon 2xxGE series APU, PCIE2 slot will run at x4 mode.)AMD Athlon series CPUs- 1 x PCI Express 3.0 x16 Slot (PCIE2: x4 mode)**Supports NVMe SSD as boot disks |
| PCI Express 2．0 x16 | AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge)- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)AMD Ryzen series CPUs (Picasso, Raven Ridge)- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)AMD Athlon series CPUs- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)*Supports NVMe SSD as boot disks |
| PCI Express x1 | 1 x PCI Express 2.0 x1 Slot |
| SATA 6Gb/s | 4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug** M2_2 and SATA3_3 share lanes. If either one of them is in use, the other one will be disabled. |
| M．2 | 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16Gb/s) (with Athlon series APU and Raven Ridge 2)**1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0Gb/s module** Supports NVMe SSD as boot disks** Supports ASRock U.2 Kit |
| SATA RAID | 0/1/10 |
| Onboard Video Chipset | Integrated AMD Radeon Vega Series Graphics in Ryzen Series APU*DirectX 12, Pixel Shader 5.0Shared memory default 2GB. Max Shared memory supports up to 16GB.**Dual graphics output: Support HDMI and DisplayPort 1.2 ports by independent display controllersSupports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24 Hz / (3840x2160) @ 30 HzSupports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096x2160) @ 60 HzSupports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 1.4 Port (Compliant HDMI monitor is required)Supports HDCP 1.4 with HDMI 1.4 and DisplayPort 1.2 PortsSupports 4K Ultra HD (UHD) playback with HDMI 1.4 and DisplayPort 1.2 Ports* Actual support may vary by CPU** The Max shared memory 16GB requires 32GB system memory installed. |
| Audio Chipset | Realtek ALC892/897 Audio Codec |
| Audio Channels | 7.1 CH HD Audio with Content Protection Supports Surge Protection |
| LAN Chipset | Realtek RTL8111H |
| Max LAN Speed | 10/100/1000Mbps |
| Back I/O Ports | 1 x PS/2 Mouse/Keyboard Port1 x HDMI Port1 x DisplayPort 1.21 x Optical SPDIF Out Port2 x USB 2.0 Ports (Supports ESD Protection)1 x USB 3.2 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection)4 x USB 3.2 Gen1 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) |
| Onboard USB | 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) |
| Other Connectors | 1 x COM Port Header1 x TPM Header1 x Chassis Intrusion Header1 x Power LED and Speaker Header1 x RGB LED Header*1 x Addressable LED Header**1 x AMD Fan LED Header***1 x CPU Fan Connector (4-pin)****1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)*****3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)******1 x Front Panel Audio Connector* Supports in total up to 12V/3A, 36W LED Strip.** Supports in total up to 5V/3A, 15W LED Strip.*** The AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.**** The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.***** The CPU/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.****** The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.****** CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP and CHA_FAN3/WP can auto detect if 3-pin or 4-pin fan is in use. |
| Form Factor | Micro ATX |
| LED Lighting | RGB |
| Dimensions (W x L) | 9.6" x 9.6" |
| Power Pin | 1 x 24-pin ATX Power Connector1 x 8-pin 12V Power Connector |
| Warranty | 3 Years |
| Country Of Origin | China |
