Version 1.0
Published January 2019
Copyright©2019 ASRock INC. All rights reserved.
Copyright Notice:
No part of this documentation may be reproduced, transcribed, transmitted, or
translated in any language, in any form or by any means, except duplication of
documentation by the purchaser for backup purpose, without written consent of
ASRock Inc.
Products and corporate names appearing in this documentation may or may not
be registered trademarks or copyrights of their respective companies, and are used
only for identication or explanation and to the owners’ benet, without intent to
infringe.
Disclaimer:
Specications and information contained in this documentation are furnished for
informational use only and subject to change without notice, and should not be
constructed as a commitment by ASRock. ASRock assumes no responsibility for
any errors or omissions that may appear in this documentation.
With respect to the contents of this documentation, ASRock does not provide
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties or conditions of merchantability or tness for a particular
purpose.
In no event shall ASRock, its directors, ocers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of prots, loss of business, loss of data, interruption of business and the like),
even if ASRock has been advised of the possibility of such damages arising from any
defect or error in the documentation or product.
is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
CALIFORNIA, USA ONLY
e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/
perchlorate”
ASRock Website: http://www.asrock.com
AUSTRALIA ONLY
Our goods come with guarantees that cannot be excluded under the Australian Consumer
Law. You are entitled to a replacement or refund for a major failure and compensation for
any other reasonably foreseeable loss or damage caused by our goods. You are also entitled
to have the goods repaired or replaced if the goods fail to be of acceptable quality and the
failure does not amount to a major failure. If you require assistance please call ASRock Tel
: +886-2-28965588 ext.123 (Standard International call charges apply)
e terms HDMI® and HDMI High-Denition Multimedia Interface, and the HDMI
logo are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.
Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 7
1.4 I/O Panel 9
Chapter 2 Installation 11
2.1 Installing the CPU 12
2.2 Installing the CPU Fan and Heatsink 14
2.3 Installing Memory Modules (DIMM) 22
2.4 Expansion Slots (PCI Express Slots) 26
2.5 Jumpers Setup 27
2.6 Onboard Headers and Connectors 28
2.7 CrossFireX
TM
and Quad CrossFireX
TM
Operation Guide 33
2.7.1 Installing Two CrossFireX
TM
-Ready Graphics Cards 33
2.7.2 Driver Installation and Setup 35
2.8 M.2_SSD (NGFF) Module Installation Guide (M2_1) 36
2.9 M.2_SSD (NGFF) Module Installation Guide (M2_2) 39
Chapter 3 Software and Utilities Operation 42
3.1 Installing Drivers 42
3.2 A-Tuning 43
3.2.1 Installing A-Tuning 43
3.2.2 Using A-Tuning 43
3.3 ASRock Live Update & APP Shop 46
3.3.1 UI Overview 46
3.3.2 Apps 47
3.3.3 BIOS & Drivers 50
3.3.4 Setting 51
3.4 ASRock Polychrome RGB 52
Chapter 4 UEFI SETUP UTILITY 55
4.1 Introduction 55
4.1.1 UEFI Menu Bar 55
4.1.2 Navigation Keys 56
4.2 Main Screen 57
4.3 OC Tweaker Screen 58
4.4 Advanced Screen 61
4.4.1 CPU Conguration 62
4.4.2 North Bridge Conguration 63
4.4.3 South Bridge Conguration 64
4.4.4 Storage Conguration 65
4.4.5 Super IO Conguration 66
4.4.6 ACPI Conguration 67
4.4.7 Trusted Computing 68
4.4.8 AMD CBS 69
4.4.9 AMD PBS 77
4.5 Tools 78
4.6 Hardware Health Event Monitoring Screen 80
Chapter 1 Introduction
ank you for purchasing ASRock B450M Steel Legend motherboard, a reliable
motherboard produced under ASRock’s consistently stringent quality control.
It delivers excellent performance with robust design conforming to ASRock’s
commitment to quality and endurance.
In this manual, Chapter 1 and 2 contains the introduction of the motherboard
and step-by-step installation guides. Chapter 3 contains the operation guide of the
soware and utilities. Chapter 4 contains the conguration guide of the BIOS setup.
1.1 Package Contents
•
ASRock B450M Steel Legend Motherboard (Micro ATX Form Factor)
•
ASRock B450M Steel Legend Quick Installation Guide
•
ASRock B450M Steel Legend Support CD
•
1 x I/O Panel Shield
•
2 x Serial ATA (SATA) Data Cables (Optional)
•
2 x Screws for M.2 Sockets (Optional)
4.7 Security Screen 83
4.8 Boot Screen 84
4.9 Exit Screen 87
B450M Steel Legend
1
English
Chapter 1 Introduction
ank you for purchasing ASRock B450M Steel Legend motherboard, a reliable
motherboard produced under ASRock’s consistently stringent quality control.
It delivers excellent performance with robust design conforming to ASRock’s
commitment to quality and endurance.
In this manual, Chapter 1 and 2 contains the introduction of the motherboard
and step-by-step installation guides. Chapter 3 contains the operation guide of the
soware and utilities. Chapter 4 contains the conguration guide of the BIOS setup.
1.1 Package Contents
•
ASRock B450M Steel Legend Motherboard (Micro ATX Form Factor)
•
ASRock B450M Steel Legend Quick Installation Guide
•
ASRock B450M Steel Legend Support CD
•
1 x I/O Panel Shield
•
2 x Serial ATA (SATA) Data Cables (Optional)
•
2 x Screws for M.2 Sockets (Optional)
Because the motherboard specications and the BIOS soware might be updated, the
content of this manual will be subject to change without notice. In case any modica-
tions of this manual occur, the updated version will be available on ASRock’s website
without further notice. If you require technical support related to this motherboard,
please visit our website for specic information about the model you are using. You
may nd the latest VGA cards and CPU support list on ASRock’s website as well.
ASRock website http://www.asrock.com.
English
2
1.2 Specications
Platform
•
Micro ATX Form Factor
CPU
•
AMD AM4 Socket
•
Digi Power design
•
6 Power Phase design
•
Supports 105W Water Cooling (Pinnacle Ridge); Supports
95W Water Cooling (Summit Ridge); Supports 65W Water
Cooling (Raven Ridge)
Chipset
•
AMD Promontory B450
Memory
•
Dual Channel DDR4 Memory Technology
•
4 x DDR4 DIMM Slots
•
AMD Ryzen series CPUs (Matisse) support DDR4
3200/2933/2667/2400/2133 ECC & non-ECC, un-buered
memory*
•
AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4
3533+(OC)/3200(OC)/2933(OC)/2667/2400/2133 ECC & non-
ECC, un-buered memory*
•
AMD Ryzen series CPUs (Picasso) support DDR4
2933/2667/2400/2133 non-ECC, un-buered memory*
•
AMD Ryzen series CPUs (Summit Ridge) support DDR4
3466+(OC)/3200(OC)/2933(OC)/2667/2400/2133 ECC &
non-ECC, un-buered memory*
•
AMD Ryzen series CPUs (Raven Ridge) support DDR4
3466+(OC)/3200(OC)/2933/2667/2400/2133 non-ECC, un-
buered memory*
* For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only
supported with PRO CPUs.
* Please refer to Memory Support List on ASRock’s website for
more information. (http://www.asrock.com/)
* Please refer to page 22 for the table for AMD non-XMP mem-
ory frequency support. For more details, please refer to the QVL
on ASRock’s website.
•
Max. capacity of system memory: 64GB
•
15μ Gold Contact in DIMM Slots
B450M Steel Legend
3
English
Expansion
Slot
AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle
Ridge)
•
1 x PCI Express 3.0 x16 Slot (PCIE2: x16 mode)*
•
1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
AMD Ryzen series CPUs (Picasso, Raven Ridge)
•
1 x PCI Express 3.0 x16 Slot (PCIE2: x8 mode)*
•
1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
AMD Athlon series CPUs
•
1 x PCI Express 3.0 x16 Slot (PCIE2: x4 mode)*
•
1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
* Supports NVMe SSD as boot disks
•
1 x PCI Express 2.0 x1 Slot
•
Supports AMD Quad CrossFireX
TM
and CrossFireX
TM
Graphics
•
Integrated AMD Radeon
TM
Vega Series Graphics in Ryzen
Series APU*
* Actual support may vary by CPU
•
DirectX 12, Pixel Shader 5.0
•
Shared memory default 2GB. Max Shared memory supports
up to 16GB.
* e Max shared memory 16GB requires 32GB system memory
installed.
•
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) @ 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
English
4
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
LAN
•
PCIE x1 Gigabit LAN 10/100/1000 Mb/s
•
Realtek RTL8111H
•
Supports Wake-On-LAN
•
Supports Lightning/ESD Protection
•
Supports Energy Ecient Ethernet 802.3az
•
Supports PXE
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 3.1 Gen2 Type-A Port (10 Gb/s) (Supports ESD Pro-
tection)
•
1 x USB 3.1 Gen2 Type-C Port (10 Gb/s) (Supports ESD Pro-
tection)
•
4 x USB 3.1 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)
Storage
•
4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0,
RAID 1 and RAID 10), 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.
•
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 Matisse, Picasso, Summit Ridge, Raven Ridge and
Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon 2xxGE
series APU)**
B450M Steel Legend
5
English
•
1 x M.2 Socket (M2_2), supports M Key type
2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module**
** Supports NVMe SSD as boot disks
** Supports ASRock U.2 Kit
Connector
•
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
* Supports in total up to 12V/3A, 36W LED Strip
•
1 x Addressable LED Header
* Supports in total up to 5V/3A, 15W LED Strip
•
1 x AMD Fan LED Header
* e AMD Fan LED Header supports LED strips of maximum
load of 3A (36W) and length up to 2.5M.
•
1 x CPU Fan Connector (4-pin)
* e CPU Fan Connector supports the CPU fan of maximum
1A (12W) fan power.
•
1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan
Speed Control)
* e CPU/Water Pump Fan supports the water cooler fan of
maximum 2A (24W) fan power.
•
3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan
Speed Control)
* e 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.
•
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)
English
6
* For detailed product information, please visit our website:
http://www.asrock.com
Please realize that there is a certain risk involved with overclocking, including adjust-
ing the setting in the BIOS, applying Untied Overclocking Technology, or using third-
party overclocking tools. Overclocking may aect your system’s stability, or even cause
damage to the components and devices of your system. It should be done at your own
risk and expense. We are not responsible for possible damage caused by overclocking.
BIOS
Feature
•
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
Hardware
Monitor
•
Temperature Sensing: CPU, CPU/Water Pump, Chassis/Wa-
ter Pump Fans
•
Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water
Pump Fans
•
Quiet Fan (Auto adjust chassis fan speed by CPU tempera-
ture): CPU, CPU/Water Pump, Chassis/Water Pump Fans
•
Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/
Water Pump Fans
•
CASE OPEN detection
•
Voltage monitoring: +12V, +5V, +3.3V, Vcore
OS
•
Microso® Windows® 10 64-bit
Certica-
tions
•
FCC, CE
•
ErP/EuP ready (ErP/EuP ready power supply is required)
B450M Steel Legend
7
English
1.3 Motherboard Layout
3
4
2
7
5
6
8
9
1 0
1 1
1
1 5
1 7
1 6
1 3
1 2
1 8
1 9
1 4
ATXPWR1
Super
I/O
CLR CMO S1
1
PCIE2
HD_ AU DIO 1
1
CPU _FAN 2/ WP
RJ-45 LAN
SOCKET AM 4
USB 3 .1 Gen2
1
COM 1
CMOS
Battery
ATX1 2V 1
M2_1
Ul t r a M. 2
PC Ie Ge n3 x4
USB 3_ 56
1
CHA _FAN 1/W P
HDLE D RE SET
PLED PWRBT N
PANE L1
1
RoHS
SPK _PL ED1
1
DDR4_A 1 (64 bit, 288 -pin module)
DDR4_A 2 (64 bit, 288 -pin module)
DDR4_B 1 (64 bit, 288 -pin module)
DDR4_B 2 (64 bit, 288 -pin module)
PCIE1
PCIE3
M2_2
M2_ 2_ CT2M2_ 2_ CT3M2_ 2_ CT4 M2_ 2_ CT1
AMD
Promontor y
B450
AMD_ FAN_ LED 1
1
M2_ 1_ CT3M2_ 1_ CT2M2_ 1_ CT1
1
USB _5_ 6
TPM S1
1
SATA3 _3
SATA3 _4
SATA3 _1
SATA3 _2
2 1
2 0
2 2
2 6
B450M
STEEL LEGEND
USB 3 .1 Gen 1
T: USB3 _3
B: USB3_ 4
USB 3. 1 Ge n2
T: USB 31 _TA_1
B: U SB 31 _T C_ 1
HDMI1
USB 2.0
T: USB1
B: USB2
PS2
Keybo ard/
Mouse
CPU _FAN 1
CI1
1
CHA _FAN 2/ WP
CHA _FAN 3/ WP
1
USB _3_ 4
RGB_ HEA DER 1
1
ADDR _LE D1
1
2 4
2 3
2 5
DP1
USB 3 .1 Gen 1
T: USB3 _1
B: USB3_ 2
Top:
Central/Bass
Cen te r:
REA R S PK
Top:
LIN E I N
Cen te r:
FRO NT
Bot to m:
Opt ic al
SPD IF
Bot to m:
MIC IN
English
8
No. Description
1 ATX 12V Power Connector (ATX12V1)
2 CPU/Water Pump Fan Connector (CPU_FAN2/WP)
3 CPU Fan Connector (CPU_FAN1)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
5 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
6 AMD Fan LED Header (AMD_FAN_LED1)
7 ATX Power Connector (ATXPWR1)
8 USB 3.1 Gen1 Header (USB3_56)
9 SATA3 Connector (SATA3_3)
10 SATA3 Connector (SATA3_4)
11 SATA3 Connector (SATA3_2)
12 SATA3 Connector (SATA3_1)
13 System Panel Header (PANEL1)
14 Power LED and Speaker Header (SPK_PLED1)
15 Chassis Intrusion Header (CI1)
16 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)
17 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)
18 Clear CMOS Jumper (CLRCMOS1)
19 USB 2.0 Header (USB_5_6)
20 USB 2.0 Header (USB_3_4)
21 COM Port Header (COM1)
22 TPM Header (TPMS1)
23 RGB LED Header (RGB_HEADER1)
24 Addressable LED Header (ADDR_LED1)
25 Front Panel Audio Header (HD_AUDIO1)
26 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)
B450M Steel Legend
9
English
1.4 I/O Panel
No. Description No. Description
1 USB 2.0 Ports (USB_1_2)* 9 USB 3.1 Gen2 Type-A Port (USB31_TA_1)
2 LAN RJ-45 Port** 10 USB 3.1 Gen2 Type-C Port (USB31_TC_1)
3 Central / Bass (Orange) 11 USB 3.1 Gen1 Ports (USB3_12)
4 Rear Speaker (Black) 12 USB 3.1 Gen1 Ports (USB3_34)
5 Line In (Light Blue) 13 HDMI Port
6 Front Speaker (Lime)*** 14 DisplayPort 1.2
7 Microphone (Pink) 15 PS/2 Mouse/Keyboard Port
8 Optical SPDIF Out Port
1
11
12
1315 14
789
10
4
3
6
5
2
English
10
*** If you use a 2-channel speaker, please connect the speaker’s plug into “Front Speaker Jack”. See the table below
for connection details in accordance with the type of speaker you use.
Audio Output
Channels
Front Speaker
(No. 6)
Rear Speaker
(No. 4)
Central / Bass
(No. 3)
Line In
(No. 5)
2 V -- -- --
4 V V -- --
6 V V V --
8 V V V V
** ere are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.
Activity / Link LED Speed LED
Status Description Status Description
O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection
ACT/LINK LED
SPEED LED
LAN Port
* Please note that the USB_1 and USB_2 consume auxiliary power (+5VSB) while the other USB ports consume
DUAL Power (+5VDUAL). e USB_1 and USB_2 are optimal for connecting the USB Type speaker and headset.
B450M Steel Legend
11
English
is is a Micro ATX form factor motherboard. Before you install the motherboard,
study the conguration of your chassis to ensure that the motherboard ts into it.
Pre-installation Precautions
Take note of the following precautions before you install motherboard components
or change any motherboard settings.
•
Make sure to unplug the power cord before installing or removing the motherboard.
Failure to do so may cause physical injuries to you and damages to motherboard
components.
•
In order to avoid damage from static electricity to the motherboard’s components,
NEVER place your motherboard directly on a carpet. Also remember to use a grounded
wrist strap or touch a safety grounded object before you handle the components.
•
Hold components by the edges and do not touch the ICs.
•
Whenever you uninstall any components, place them on a grounded anti-static pad or
in the bag that comes with the components.
•
When placing screws to secure the motherboard to the chassis, please do not over-
tighten the screws! Doing so may damage the motherboard.
Chapter 2 Installation
English
12
2.1 Installing the CPU
Unplug all power cables before installing the CPU.
2
1
B450M Steel Legend
13
English
3
English
14
2.2 Installing the CPU Fan and Heatsink
Aer you install the CPU into this motherboard, it is necessary to install a larger
heatsink and cooling fan to dissipate heat. You also need to spray thermal grease
between the CPU and the heatsink to improve heat dissipation. Make sure that the
CPU and the heatsink are securely fastened and in good contact with each other.
Installing the CPU Box Cooler SR1
Please turn o the power or remove the power cord before changing a CPU or heatsink.
1
2
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