Description:
ASRock B450 Steel Legend Motherboard supports AMD AM4 Socket Ryzen™ 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series Desktop Processors with graphics output such as DisplayPort and HDMI.

Features:

Supports AMD AM4 Socket Ryzen™ 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series Desktop Processors
Supports DDR4 3533+ (OC)
2 PCIe 3.0 x16, 4 PCIe 2.0 x1
AMD Quad CrossFireX™
Graphics Output: DisplayPort, HDMI
7.1 CH HD Audio (Realtek ALC892/897 Audio Codec)
6 SATA3, 1 Ultra M.2 (PCIe Gen3 x4), 1 M.2 (PCIe Gen3 x2 & SATA3)
2 USB 3.2 Gen2 (Rear Type-A+C)
6 USB 3.2 Gen1 (2 Front, 4 Rear)
Realtek Gigabit LAN
Dual M.2 For SSD, Supports Type 22110 M.2
Two of the world’s fastest M.2 slots. One delivers up to PCIe Gen3 x4 32Gb/s transfer speed, the other one supports PCIe Gen3 x2 & SATA3 6Gb/s mode.
M.2 Armors:
Good M.2 SSD protection is important for longevity and stability. ASRock provides a completed M.2 armor solution on the B450 platform that makes SSDs run at a certain low temperature.

Dual USB 3.2 Gen2 (Type-A + Type-C):
This motherboard has a pair of onboard Type-A and Type-C USB 3.2 Gen2 ports built on the rear I/O for supporting next-generation USB 3.2 Gen2 devices and to deliver up to 10 Gbps data transfer rates.

Specifications:

Model Number: B450 Steel Legend
Unique Feature: 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
Nichicon 12K Black Caps (100% Japan made high-quality conductive polymer capacitors)
I/O Armor
Sapphire Black PCB
High-Density Glass Fabric PCB
2oz Copper PCB
ASRock Steel Slot
ASRock Full Coverage M.2 Heatsink
ASRock Ultra M.2 (PCIe Gen3 x4)
ASRock Ultra USB Power
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Shop
CPU:

Supports AMD AM4 Socket Ryzen™ 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series Desktop Processors
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 (Vermeer) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
Max. capacity of system memory: 128GB**
Supports Extreme Memory Profile (XMP) memory modules
15μ Gold Contact in DIMM Slots
BIOS:

128Mb AMI UEFI Legal BIOS with multilingual GUI support
Supports “Plug and Play”
ACPI 5.1 compliance wake-up events
Supports jumper-free
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 (4096×2160) @ 24Hz / (3840×2160) @ 30Hz
Supports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096×2160) @ 60Hz
Audio:

7.1 CH HD Audio with Content Protection (Realtek ALC892/897 Audio Codec)
Supports Surge Protection
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 (Vermeer, Matisse, Cezanne, Renoir, Summit Ridge, and Pinnacle Ridge)
2 x PCI Express 3.0 x16 Slots (PCIE1: x16 mode; PCIE4: x4 mode)*
AMD Athlon series CPUs
2 x PCI Express 3.0 x16 Slots (PCIE1: x4 mode; PCIE4: x2 mode)*
4 x PCI Express 2.0 x1 Slots
Supports AMD Quad CrossFireX™ and CrossFireX™**
Storage:

4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1, and RAID 10), NCQ, AHCI, and Hot Plug*
2 x SATA3 6.0 Gb/s Connectors by ASMedia ASM1061, support NCQ, AHCI, and Hot Plug
1 x Ultra M.2 Socket (M2_1), supports M Key type 2230/2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s)
1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)
Connector:

1 x COM Port Header
1 x TPM 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 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)
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 3.2 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 (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 Motherboard Utility (A-Tuning)
ASRock Polychrome SYNC
ASRock XFast LAN
UEFI
ASRock Full HD UEFI
ASRock Instant Flash
ASRock Easy RAID Installer
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
1 x Standoff for M.2 Socket
Hardware Monitor:

Temperature Sensing: CPU, MB