Asrock B450 Steel Legend AM4 ATX AMD Motherboard

Model

Brand

ASRock

Model

B450 Steel Legend

Supported CPU

CPU Socket Type

AM4

CPU Type

Ryzen Series

Chipsets

Chipset

AMD Promontory B450

Memory

Number of Memory Slots

4×288pin

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

Expansion Slots

PCI Express 3.0 x16

AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge)
- 2 x PCI Express 3.0 x16 Slots (PCIE1: x16 mode; PCIE4: x4 mode)*
AMD Ryzen series CPUs (Raven Ridge)
- 2 x PCI Express 3.0 x16 Slots (PCIE1: x8 mode; PCIE4: x4 mode) (If you use Athlon 2xxGE series APU, PCIE1 slot will run at x4 mode.)
AMD Athlon series CPUs
- 2 x PCI Express 3.0 x16 Slots (PCIE1: x4 mode; PCIE4: x2 mode)*

* Supports NVMe SSD as boot disks
* If M2_1 is occupied, PCIE4 will be disabled.

PCI Express x1

4 x PCI Express 2.0 x1 Slots

Storage Devices

SATA 6Gb/s

4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug*
2 x SATA3 6.0Gb/s Connectors by ASMedia ASM1061, support NCQ, AHCI and Hot Plug
* M2_2, SATA3_3 and SATA3_4 share lanes. If either one of them is in use, the others will be disabled.

M.2

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 (32Gb/s) (with Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16Gb/s) (with Athlon 2xxGE series APU and Raven Ridge 2)**
1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x2 (16Gb/s)**

** If M2_1 is occupied, PCIE4 will be disabled
** Supports NVMe SSD as boot disks
** Supports ASRock U.2 Kit

SATA RAID

0/1/10

Onboard Video

Onboard Video Chipset

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) @ 24 Hz / (3840x2160) @ 30 Hz
Supports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096x2160) @ 60 Hz
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

Onboard Audio

Audio Chipset

Realtek ALC892

Audio Channels

7.1 Channels
* To configure 7.1 CH HD Audio, it is required to use an HD front panel audio module and enable the multi-channel audio feature through the audio driver.

Onboard LAN

LAN Chipset

Realtek RTL8111H

Max LAN Speed

10/100/1000Mbps

Rear Panel Ports

Back I/O Ports

1 x DisplayPort / 1 x HDMI / 1 x LAN (RJ45) / 1 x Optical S/PDIF Out / 1 x PS/2 Keyboard/Mouse Combo / 1 x USB 3.1 Gen 2 Type-A / 1 x USB 3.1 Gen 2 Type-C / 2 x USB 2.0/1.1 / 4 x USB 3.1 Gen 1 Type-A / 6 x Audio Jacks

PS/2

1 x PS/2 keyboard/mouse port

HDMI

1 x HDMI

RJ45

1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)

DisplayPort

1 x DisplayPort 1.2

USB 3.1

1 x USB 3.1 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)
4 x USB 3.1 Gen1 Ports (Supports ESD Protection)*

* Ultra USB Power is supported on USB3_34 ports.
* ACPI wake-up function is not supported on USB3_34 ports.

USB 1.1/2.0

2 x USB 2.0 Ports (Supports ESD Protection)

USB Type-C

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

S/PDIF Out

1 x Optical

Audio Ports

HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)

Internal I/O Connectors

Onboard USB

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)

Other Connectors

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 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.

Physical Spec

Form Factor

ATX

LED Lighting

RGB

Dimensions (W x L)

12.0" x 9.6"

Power Pin

1 x 24-pin ATX Power Connector
1 x 8-pin 12V Power Connector