ASROCK B450M STEEL LEGEND (AM4, AMD PROMONTORY B450, DDR4, USB3.1, SATA3)

Model

Brand

ASRock

Model

B450M Steel Legend

Supported CPU

CPU Socket Type

AM4

CPU Type

Ryzen Series

Chipsets

Chipset

AMD Promontory B450

Memory

Number of Memory Slots

4x288pin (DDR4)

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 (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

Storage Devices

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

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 ALC892/897 Audio Codec

Audio Channels

7.1 CH HD Audio with Content Protection
Supports Surge Protection

Onboard LAN

LAN Chipset

Realtek RTL8111H

Max LAN Speed

10/100/1000Mbps

Rear Panel Ports

Back I/O Ports

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 (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)

Internal I/O Connectors

Onboard USB

2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)

Other Connectors

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 Front Panel Audio Connector