ASRock B450 Steel Legend AM4 AMD Promontory B450 SATA 6Gb/s ATX AMD Motherboard


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ASRock B450 Motherboard and Its Product Box
ASRock B450 Steel Legend Motherboard

Powered by AMD B450 chipset, this motherboard supports up to 2nd generation AMD Ryzen processors of up to eight cores. This board looks great, featuring a camouflage-themed PCB, aggressive-looking heatsinks, and has onboard LED lighting that supports full spectrum of RGB colors with various effects, and can synchronize with other devices enabled with ASRock Polychrome. More than a pretty face, this B450 Steel Legend has quad DIMM slots supporting DDR4 3533+ (OC), two PCI-E x16 slots ready for AMD Quad CrossFireX, two M.2 slots, and two USB 3.1 Gen2 ports (rear Type-A + Type-C), so you have all essentials needed to build your new powerhouse. Moreover, this board is also constructed to be tough, with Super Alloy components, Full Spike Protection, and a PCI-E x16 slot covered by steel plate for better strength and less EMI.

If you're looking for a solid, budget-friendly yet feature-rich foundation for your dream system, look no further than ASRock B450 Steel Legend.

  • AMD AM4 Socket
  • Supports DDR4 3533+ (OC)
  • 2x PCIe 3.0 x16, 4x PCIe 2.0 x1
  • AMD Quad CrossFireX™
  • Graphics Output: DisplayPort and HDMI
  • 7.1 CH HD Audio (Realtek ALC892 Audio Codec), Nichicon Fine Gold Series Audio Caps
  • 6x SATA3, 1x Ultra M.2 (PCIe Gen3 x4), 1x M.2 (PCIe Gen3 x2 and SATA3)
  • 2x USB 3.1 Gen2 (Rear Type-A + C)
  • 6x USB 3.1 Gen1 (2 Front and 4 Rear)
  • Realtek Gigabit LAN
Steel Legend LogoB450 Motherboard Image with Numbers 1-8 Indicating Important Aspect/Components
  1. Ultra USB Power
  2. 2x USB 3.1 Gen2 10Gbps
  3. Gold Audio Jacks
  4. Nichicon Fine Gold Series Audio Caps
  1. AMD AM4 Socket Supports 105W Water Cooling Digi Power Premium 60A Power Choke Nichicon 12K Black Caps
  2. Dual M.2 Sockets
  3. PCI-E Steel Slot
  4. Built-in Addressable LED ARGB Header RGB Header
Tough As Steel True Legend Banner with Gears and Metalworking Graphics

Steel Legend represents the philosophical state of rock-solid durability and irresistible aesthetics. Built around the most demanding specs and features, the Steel Legend series aims at daily users and mainstream enthusiasts! Providing a strong array of materials/components to ensure a stable and reliable performance, these motherboards fulfill every task with style!

Closeup shot of RGB lighting in the dark
RULE YOUR OWN LIGHTING WAY WITH POLYCHROME RGB

Steel Legend motherboards deliver stunning performance and superior aesthetics to rule your own colorful lighting way! ASRock offers highly comprehensive control to smoothly utilize the built-in RGB LEDs or connected LED strips, CPU fans, coolers, chassis and any other compatible RGB devices. Devices can be synchronized across the Polychrome RGB Sync-certified line of accessories as well.

ASRock polychrome sync and polychrome RGB logos

The addressable RGB LED header supports a WS2812B addressable RGB LED strip (5V/Data/GND) with a maximum power rating of 3A (5V) and a max of 80 LEDs with a length up to 2 meters.
The RGB LED header supports standard 5050 RGB LED strips (12V/G/R/B) with a maximum power rating of 3A (12V) and lengths within 2 meters.

All the compatible RGB LED products from memory sticks to power supplies and cases
Closeup picture Type 2280 M.2 Slot on the Motherboard
A SOLID M.2-SOLUTION PERFORMER

Dual M.2 for SSDs That Supports Type 22110 M.2
The B450 houses two of the world's fastest M.2 slots. One slot delivers up to PCIe Gen3 x4 32Gbps transfer speed, the other one supports PCIe Gen3 x2 & SATA3 6Gbps mode.

M.2 Armor
Good M.2 SSD protection is important for longevity and stability. ASRock has provided a complete M.2 armor solution on the B450 platform that makes SSDs run perfectly at low temperatures.

Close up of the motherboard USB ports
Dual USB 3.1 Gen2 (Type-A + Type-C)

This motherboard has a pair of onboard Type-A and Type-C USB 3.1 Gen2 ports built on the rear I/O to support next-generation USB 3.1 Gen2 devices while delivering up to 10 Gbps data-transfer rates.

USB 3.1 Gen2 doubles the data transfer rate!
USB 3.1 Gen2 Chart two times faster than Gen1
USB 3.1 Gen2 Type-C doubles the charge speed!
USB 3.1 Gen2 Type-C two times faster than Gen1 Type-A
Chart showing the effects of Ultra USB Power
ULTRA USB POWER
ULTRA STABLE POWER

The +5V voltage on these motherboards is transferred from the +12V, supplying enough current to USB devices without dropping voltage directly from the PSU.

B450M
ANTISTATIC SHIELD

Protect your mouse and keyboard against static electricity. This especially lowers the chances of USB mouse lag or stuttering.

PURE AUDIO QUALITY

The USB speaker is best connected via Ultra USB Power ports to execute a pure current while offering high audio quality without distortion.

Closeup shot of the motherboard being split to show three layers with the middle being a glowing copper
2 oz Copper

This motherboard has been made with 2 ounces of copper inner layers. The copper materials for PCB layers were carefully selected to deliver lower temperatures and higher energy efficiency for overclocking.

Closeup of the power choke
PREMIUM 60A POWER CHOKE

ASRock's premium 60A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

closeup of the pci-e steel slot on the motherboard
PCI-E STEEL SLOT

The advanced PCI-E steel slot packed with a solid cover prevents any signal interference with graphics cards. It also ensures that heavy graphics cards can be safely installed in the PCI-E slot.

Super Alloy Motherboard Graphic Text
XXL Aluminum-Alloy Heatsink
Close of the Aluminum Ally Heatsink

Extra-large, aluminum-alloy heat sinks effectively take away heat from the MOSFET and chipset so that your whole system may perform more stably.

Premium 60A Power Choke
closeup of the power choke

Compared to traditional chokes, ASRock's premium 60A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

Nichicon 12K Black Caps
Closeup of the Nichicon 12K Black Caps

Supreme 12K black capacitors with lifespans of at least 12,000 hours. Compared to other counterparts on high-end motherboards that merely have lifespans of around 10,000 hours, ASRock applied Nichicon 12K Black Caps that offer 20% longer lifespans and provide more stability and reliability.

I/O Armor

Closeup of the protective cover on the motherboard

A newly designed protective cover for all of the crucial parts near the motherboard's rear I/O serve to protect the motherboard from damage by static electricity.

Sapphire Black PCB

Closeup of the bottom-right of the motherboard showing the PCB

The new Sapphire Black PCB represents rock-solid quality and gives the motherboard a more mysterious touch.

High Density Glass Fabric PCB
A Graphic Comparing High Density Fabric versus Traditional

The motherboard's High Density Glass Fabric PCB design reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

2oz Copper PCB

B450M

Using only carefully selected copper materials for PCB layers, the 2oz Copper PCB delivers lower temperatures and higher energy efficiency for overclocking.

Full Spike Protection Logo, An Orange Shield with the Service Text
Full Spike Protection

Some sensitive digital components on the motherboard are vulnerable to power surges, the excessive current may cause your system to malfunction immediately. ASRock Full Spike Protection includes various technologies to prevent your motherboard's components from being damaged by these unexpected voltage spikes.

ASRock App Shop Compatible Media Logos
Live Update & APP Shop

The ASRock Live Update & APP Shop is designed for your convenience. We provide various apps and support software for users to download. You can also easily optimize your system and keep your motherboard up to date with ASRock Live Update & APP Shop.

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 (Matisse, Summit Ridge and Pinnacle Ridge)
- 2 x PCI Express 3.0 x16 Slots (PCIE1: x16 mode; PCIE4: x4 mode)*
AMD Ryzen series CPUs (Picasso, 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 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 2230/2242/2260/2280/22110 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 ALC892/897 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)

* Ultra USB Power is supported on USB3_34 ports.
* ACPI wake-up function is not supported on USB3_34 ports.
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 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
Additional Information
Date First Available February 28, 2019


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