Asrock B450M Steel Legend mATX AM4 Motherboard

CPU

- AMD AM4 Socket

- Digi Power design

- 6 Power Phase design

CHIPSET

- AMD Promontory B450

MEMORY

- Dual Channel DDR4 Memory   Technology

- 4 x DDR4 DIMM Slots

- 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   (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*

- Max. capacity of system   memory: 64GB**

- 15? Gold Contact in DIMM   Slots

*For Ryzen Series CPUs   (Raven Ridge), ECC is only supported with PRO CPUs.

Please refer to below table   for AMD non-XMP memory frequency support. For more details, please refer to   the QVL on ASRock's website

BIOS

- 128Mb AMI UEFI Legal BIOS   with multilingual GUI support

- Supports "Plug and   Play"

- ACPI 5.1 compliance wake   up events

- Supports jumperfree

- SMBIOS 2.3 support

- DRAM Voltage   multi-adjustment

GRAPHICS

- Integrated AMD Radeon™   Vega Series Graphics in Ryzen Series APU*

- DirectX 12, Pixel Shader   5.0

- Shared memory default 2GB.   Max Shared memory supports up to 16GB.**

- Dual graphics output:   Support HDMI and DisplayPort 1.2 ports by independent display controllers

- Supports HDMI 1.4 with   max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz

- Supports DisplayPort 1.2   with max. resolution up to 4K x 2K (4096x2160) @ 60Hz

- Supports 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 Ports

- Supports 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

- 7.1 CH HD Audio with   Content Protection (Realtek ALC892 Audio Codec)

- Premium Blu-ray Audio   support

- Supports Surge Protection

- Nichicon Fine Gold Series   Audio Caps

- PCB Isolate Shielding

- Individual PCB Layers for   R/L Audio Channel

- Gold Audio Jacks

LAN

- PCIE x1 Gigabit LAN   10/100/1000 Mb/s

- Realtek RTL8111H

- Supports Wake-On-LAN

- Supports Lightning/ESD   Protection

- Supports Energy Efficient   Ethernet 802.3az

- Supports PXE

SLOTS

AMD Ryzen series CPUs   (Summit Ridge and Pinnacle Ridge)

- 1 x PCI Express 3.0 x16   Slot (PCIE2: x16 mode)*

- 1 x PCI Express 2.0 x16   Slot (PCIE3: x4 mode)

AMD Ryzen series CPUs (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.)

- 1 x PCI Express 2.0 x16   Slot (PCIE3: x4 mode)

AMD Athlon series CPUs

- 1 x PCI Express 3.0 x16   Slot (PCIE2: x4 mode)*

- 1 x PCI Express 2.0 x16   Slot (PCIE3: x4 mode)

- 1 x PCI Express 2.0 x1   Slot

- Supports AMD Quad   CrossFireX™ and CrossFireX™

*Supports NVMe SSD as boot   disks

STORAGE

- 4 x SATA3 6.0 Gb/s   Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot   Plug*

- 1 x Ultra M.2 Socket   (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3   x4 (32 Gb/s) (with Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2   (16 Gb/s) (with Athlon 2xxGE series APU and Raven Ridge 2)**

- 1 x M.2 Socket (M2_2),   supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module**

*M2_2 and SATA3_3 share   lanes. If either one of them is in use, the other one will be disabled.

**Supports NVMe SSD as boot   disks

Supports ASRock U.2 Kit

CONNECTOR

- 1 x COM Port Header

- 1 x TPM Header

- 1 x Chassis Intrusion   Header

- 1 x Power LED and Speaker   Header

- 1 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 24 pin ATX Power   Connector

- 1 x 8 pin 12V Power   Connector

- 1 x Front Panel Audio   Connector

- 2 x USB 2.0 Headers   (Support 4 USB 2.0 ports) (Supports ESD Protection)

- 1 x USB 3.1 Gen1 Header   (Supports 2 USB 3.1 Gen1 ports) (Supports ESD Protection)

*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.

REAR PANEL I/O

- 1 x PS/2 Mouse/Keyboard   Port

- 1 x HDMI Port

- 1 x DisplayPort 1.2

- 1 x Optical SPDIF Out Port

- 2 x USB 2.0 Ports   (Supports ESD Protection)

- 1 x USB 3.1 Gen2 Type-A   Port (10 Gb/s) (Supports ESD Protection)

- 1 x USB 3.1 Gen2 Type-C   Port (10 Gb/s) (Supports ESD Protection)

- 4 x USB 3.1 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)

SOFTWARE AND UEFI

Software

- ASRock A-Tuning

- ASRock Polychrome SYNC

- ASRock XFast LAN

UEFI

- ASRock Full HD UEFI

- ASRock Instant Flash

- ASRock Easy RAID Installer

*These utilities can be   downloaded from ASRock Live Update & APP Shop

SUPPORT CD

- Drivers, Utilities,   AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar

ACCESSORIES

- Quick Installation Guide,   Support CD, I/O Shield

- 2 x SATA Data Cables

- 2 x Screws for M.2 Sockets

HARDWARE MONITOR

- 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

- CASE OPEN detection

- Voltage monitoring: +12V,   +5V, +3.3V, Vcore

FORM FACTOR

- Micro ATX Form Factor:   9.6-in x 9.6-in, 24.4 cm x 24.4 cm

OS

- Microsoft® Windows® 10   64-bit

CERTIFICATIONS

- FCC, CE

- ErP/EuP ready (ErP/EuP   ready power supply is required)