Model B450M Steel Legend
CPU Support AMD AM4 Socket
Socket AM4
Chipset AMD B450
Memory Support 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
15μ Gold Contact in DIMM Slots
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.**
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
Expansion Slots AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge)
AMD Ryzen series CPUs (Raven Ridge)
AMD Athlon series CPUs

- 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
Internal I/O 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 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.

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**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.
Back Panel Connectors 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)
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
CASE OPEN detection
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
Special Features ASRock USB
3.1 Gen2

- ASRock USB
3.1 Gen2 Type
-A Port (10 Gb/s)

- ASRock USB
3.1 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 Ultra M.2 (PCIe Gen3 x4)
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Shop
AMD StoreMI
Bundle Software Software

- ASRock A
-Tuning

- ASRock Polychrome SYNC

- ASRock XFast LAN
UEFI

- ASRock Full HD UEFI

- ASRock Instant Flash

- ASRock Easy RAID Installer
Operating System Support Microsoft® Windows® 10 64
-bit