Asrock B450M/ac R2.0 User Manual

Version 1.0

Published September 2020

Copyright©2020 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 identication or explanation and to the owners’ benet, without intent to

infringe.

Disclaimer:

Specications 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, ocers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of prots, 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 batter y 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 : [phone] ext.123 (Standard
International call charges apply)

e terms HDMI® and HDMI High-Denition Multimedia Interface, and the
HDMI logo are trademarks or registered trademarks of HDMI Licensing LLC in the
United States and other countries.

CE Warning

is device complies with directive 2014/53/EU issued by the Commision of the European
Community.

is equipment complies with EU radiation exposure limits set forth for an uncontrolled
environment.
is equipment should be installed and operated with minimum distance 20cm between
the radiator & your body.

Operations in the 5.15-5.35GHz band are restricted to indoor usage only.

Radio transmit power per transceiver type

Function Frequency Maximum Output Power (EIRP)

2400-2483.5 MHz 18.5 + / -1.5 dbm

5150-5250 MHz 21.5 + / -1.5 dbm

WiFi

Bluetooth 2400-2483.5 MHz 8.5 + / -1.5 dbm

5250-5350 MHz

5470-5725 MHz

18.5 + / -1.5 dbm (no TPC)

21.5 + / -1.5 dbm (TPC)

25.5 + / -1.5 dbm (no TPC)

28.5 + / -1.5 dbm (TPC)

Contents

Chapter 1 Introduction 1

1.1 Package Contents 1

1.2 Specications 2

1.3 Motherboard Layout 7

1.4 I/O Panel 9

1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz
Antenna 11

Chapter 2 Installation 13

2.1 Installing the CPU 14

2.2 Installing the CPU Fan and Heatsink 16

2.3 Installing Memory Modules (DIMM) 25

2.4 Expansion Slots (PCI Express Slots) 28

2.5 Jumpers Setup 29

2.6 Onboard Headers and Connectors 30

2.7 M.2_SSD (NGFF) Module Installation Guide (M2_1) 35

Chapter 3 Software and Utilities Operation 38

3.1 Installing Drivers 38

3.2 A-Tuning 39

3.2.1 Installing A-Tuning 39

3.2.2 Using A-Tuning 39

3.3 ASRock Live Update & APP Shop 42

3.3.1 UI Overview 42

3.3.2 Apps 43

3.3.3 BIOS & Drivers 46

3.3.4 Setting 47

3.5 ASRock Polychrome SYNC 48

Chapter 4 UEFI SETUP UTILITY 51

4.1 Introduction 51

4.1.1 UEFI Menu Bar 51

4.1.2 Navigation Keys 52

4.2 Main Screen 53

4.3 OC Tweaker Screen 54

4.4 Advanced Screen 57

4.4.1 CPU Conguration 58

4.4.2 North Bridge Conguration 59

4.4.3 South Bridge Conguration 60

4.4.4 Storage Conguration 61

4.4.5 ACPI Conguration 62

4.4.6 Trusted Computing 63

4.4.7 AMD CBS 64

4.4.8 AMD PBS 72

4.5 Tools 73

4.6 Hardware Health Event Monitoring Screen 74

4.7 Security Screen 76

4.8 Boot Screen 77

4.9 Exit Screen 79

Chapter 1 Introduction

ank you for purchasing ASRock B450M/ac R2.0 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

soware and utilities. Chapter 4 contains the conguration guide of the BIOS setup.

Becau se the motherboard specication s and the BIOS soware might be upd ated, the
content of this manual will be subjec t to change without notice. In case any modica­tions of this manu al 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 specic information about the mod el you are using. You
may nd the l atest VGA cards and CPU suppor t list on ASRock’s website as well.
ASRock website http://www.asrock.com.

1.1 Package Contents

ASRock B450M/ac R2.0 Motherboard (Micro ATX Form Factor)

•

ASRock B450M/ac R2.0 Quick Installation Guide

•

ASRock B450M/ac R2.0 Support CD

•

1 x I/O Panel Shield

•

2 x Serial ATA (SATA) Data Cables (Optional)

•

2 x ASRock WiFi 2.4/5 GHz Antennas (Optional)

•

1 x Screw for M.2 Socket (Optional)

•

B450M/ac R2.0

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1

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1.2 Specications

Platform

CPU

Chipset

Memory

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* 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/)

•

•

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Micro ATX Form Factor

2oz Copper PCB

Solid Capacitor design

AMD AM4 Socket

Digi Power design

10 Power Phase design

AMD Promontory B450

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-buered

memory*

AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4

3200+(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-

buered memory*

AMD Ryzen series CPUs (Picasso) support DDR4

2933/2667/2400/2133 non-ECC, un-buered memor y*

AMD Ryzen series CPUs (Summit Ridge) support DDR4

3200+(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-

buered memory*

AMD Ryzen series CPUs (Raven Ridge) support DDR4

3200+(OC)/2933/2667/2400/2133 non-ECC, un-buered

memory*

Max. capacity of system memor y: 64GB

Supports Extreme Memory Prole (XMP) memory modules

15μ Gold Contact in DIMM Slots

Expansion
Slot

AMD Ryzen series CPUs (Matisse, Summit Ridge and

Pinnacle Ridge)

1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)*

•

1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)

•

2

Graphics

B450M/ac R2.0

AMD Ryzen series CPUs (Picasso, Raven Ridge)

1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)*

•

1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)

AMD Athlon series CPUs

1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)*

•

1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)

•

* Supports NVMe SSD as boot disks

Supports AMD Quad CrossFireXTM and CrossFireX

•

1 x Vertical M.2 Socket (Key E) with the bundled WiFi-

•

802.11ac module (on the rear I/O)

Integrated AMD RadeonTM 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.

Supports HDMI 1.4 with max. resolution up to 4K x 2K

•

(4096x2160) @ 24Hz / (3840x2160) @ 30Hz

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 Port

•

Supports 4K Ultra HD (UHD) playback with HDMI 1.4 Port

•

TM

Audio

LAN

7.1 CH HD Audio with Content Protection (Realtek

•

ALC892/897 Audio Codec)

Supports Surge Protection

•

PCIE x1 Gigabit LAN 10/100/1000 Mb/s

•

Realtek RTL8111H

•

Supports Wake-On-LAN

•

Supports Lightning/ESD Protection

•

Supports Energy Ecient Ethernet 802.3az

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Supports PXE

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Wireless
LAN

Rear Panel
I/O

Storage

Intel® 802.11ac WiFi Module

•

Supports IEEE 802.11a/b/g/n/ac

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Supports Dual-Band (2.4/5 GHz)

•

Supports high speed wireless connections up to 433Mbps

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Supports Bluetooth 4.2 / 3.0 + High speed class II

•

2 x Antenna Ports

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1 x HDMI Port

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2 x USB 2.0 Ports (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: Line in / Front Speaker / Microphone

•

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 Matisse, Picasso, Summit Ridge, Raven Ridge

and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series

APU)*

* Supports NVMe SSD as boot disks

* Supports ASRock U.2 Kit

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Connector

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.

BIOS
Feature

B450M/ac R2.0

1 x Chassis Fan Connector (3-pin)

•

* e Chassis Fan Connector supports the chassis fan of

maximum 1A (12W) fan power.

1 x Chassis/Water Pump Fan Connector (4-pin) (Smart Fan

•

Speed Control)

* e Chassis/Water Pump Fan supports the water cooler fan of

maximum 2A (24W) fan power.

* CHA_FAN1 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

•

1 x AMD LED Fan USB Header

•

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)

AMI UEFI Legal BIOS with multilingual GUI support

•

Supports “Plug and Play”

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ACPI 5.1 compliance wake up events

•

Supports jumperfree

•

SMBIOS 2.3 support

•

DRAM Voltage multi-adjustment

•

Hardware
Monitor

OS

Certica­tions

Temperature Sensing: CPU, Chassis, Chassis/Water Pump

•

Fans

Fan Tachometer: CPU, Chassis, Chassis/Water Pump Fans

•

Quiet Fan (Auto adjust chassis fan speed by CPU tempera-

•

ture): CPU, Chassis, Chassis/Water Pump Fans

Fan Multi-Speed Control: CPU, Chassis, Chassis/Water

•

Pump Fans

CASE OPEN detection

•

Voltage monitoring: +12V, +5V, +3.3V, Vcore

•

Microso® Windows® 10 64-bit

•

FCC, CE

•

ErP/EuP ready (ErP/EuP ready power supply is required)

•

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* For detailed product infor mation, please vis it our website: http://www.asrock .com

Please realize that there is a certain risk involved with overcl ocking, including adjust­ing the setting in the BIOS, applying Untied Overclocking Technology, or using third­party o verclocking tool s. Overclocking may aect your system’s stability, or even cause
damage to the components and devic es of your system. It should be done at your own
risk and expense. We are not re sponsible for possibl e damage caused b y overclocking.

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1.3 Motherboard Layout

5

1

14

ATXPWR1

Sup er

I/O

CLRCMOS1

1

PCIE1

1

USB_3_4

HD_AUDIO1

1

CPU_FAN1

Top:

LINE IN

Center :

FRONT

Bottom :

MIC IN

RJ- 45 LAN

USB 2.0
T: USB1
B: USB2

SOCKETAM4

CMOS

Battery

ATX12V1

M2_1

Ultra M.2

PCIe Gen3x4

USB3_5 _6

1

CHA_FAN1

CHA_FAN2

HDLED RESET

PLED PWRBTN

PANEL1

1

RoHS

SPK_PLED1

1

DDR4 _A1 (64 b it, 288 -pin mo dule)

DDR4 _A2 (64 b it, 288 -pin mo dule)

DDR4 _B1 (64 b it, 288 -pin mo dule)

DDR4 _B2 (64 b it, 288 -pin mo dule)

PCIE2

AMD

Promontory

B450

USB 3.2 Gen1
T: USB1
B: USB2

USB 3.2 Gen1
T: USB3
B: USB4

1

AMD_FAN_LED1

1

USB_7

1

M2_1_CT3M2_1_CT2M 2_1_CT1

1

USB_5_6

23

HDMI 1

M2_WIFI

ADDR_LED1

1

RGB_HEADER1

B450M/ac

CI1

15

10

11

12

SATA3_3

SATA3_4

SATA3_1

SATA3_2

9

B450M/ac R2.0

3

2

4

6

7

8

BIOS
ROM

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No. Description

1 ATX 12V Power Connector (ATX12V1)

2 CPU Fan Connector (CPU_FAN1)

3 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)

4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)

5 AMD Fan LED Header (AMD_FAN_LED1)

6 ATX Power Connector (ATXPWR1)

7 USB 3.2 Gen1 Header (USB3_5_6)

8 AMD LED Fan USB Header (USB_7)

9 SATA3 Connector (SATA3_3)(Upper)

10 SATA3 C onnec tor (SATA 3_ 4)(L ower)

11 SATA3 Connector (SATA3_2)(Lower)

12 SATA3 Connector (SATA3_1)(Upper)

13 System Panel Header (PANEL1)

14 Power LED and Speaker Header (SPK_PLED1)

15 Chassis Intrusion Header (CI1)

16 Chassis Fan Connector (CHA_FAN2)

17 USB 2.0 Header (USB_3_4)

18 USB 2.0 Header (USB_5_6)

19 Clear CMOS Jumper (CLRCMOS1)

20 RGB LED Header (RGB_HEADER1)

21 Addressable LED Header (ADDR_LED1)

22 Front Panel Audio Header (HD_AUDIO1)

23 Chassis/Water Pump Fan Connector (CHA _FAN1)

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1.4 I/O Panel

B450M/ac R2.0

2

1

3

6 589 7

No. Description No. Description

1 LAN RJ-45 Port* 6 USB 3.2 Gen1 Ports (USB3_1_2)

2 Line In (Light Blue)** 7 HDMI Port

3 Front Speaker (Lime)** 8 USB 2.0 Ports (USB_1_2)

4 Microphone (Pink)** 9 Antenna Ports

5 USB 3.2 Gen1 Ports (USB3_3_4)

* ere are two LEDs on each LAN port. Ple ase refer to the table below for the LAN port LED indications.

ACT/LINK LED

SPEED LED

LAN Por t

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

4

** Function of the Audio Ports in 7.1-channel Conguration:

Port Function

Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out

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1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz
Antenna

WiFi-802.11ac + BT Module

is motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ac + BT v4.2

module (pre-installed on the rear I/O panel) that oers support for WiFi 802.11 a/b/

g/n/ac connectivity standards and Bluetooth v4.2. WiFi + BT module is an easy-to-

use wireless local area network (WLAN) adapter to support WiFi + BT. Bluetooth

v4.2 standard features Smart Ready technology that adds a whole new class of

functionality into the mobile devices. BT 4.2 also includes Low Energy Technology

and ensures extraordinary low power consumption for PCs.

* e transmission speed may vary according to the environment.

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WiFi Antennas Installation Guide

B450M/ac R2.0

Step 1

Prepare the WiFi 2.4/5 GHz Antennas that come

with the package.

Step 2

Connect the two WiFi 2.4/5 GHz Antennas to

the antenna connectors. Turn the antenna clock-

wise until it is securely connected.

Step 3

Set the WiFi 2.4/5 GHz Antenna as shown in the

illustration.

*You may need to adjust the direction of

the antenna for a stronger signal.

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Chapter 2 Installation

is is a Micro ATX form factor motherboard. Before you install the motherboard,

study the conguration 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.

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12

2.1 Installing the CPU

Unplug all power cables before installing the CPU.

1

B450M/ac R2.0

2

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13

3

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14

2.2 Installing the CPU Fan and Heatsink

Aer 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.

Please turn o the power or remove the power cord before changing a CPU or heat sink.

Installing the CPU Box Cooler SR1

1

B450M/ac R2.0

2

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15

3

English

16

4

1

N

FA

_

U

P

C

Installing the AM4 Box Cooler SR2

1

B450M/ac R2.0

2

English

17

3

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18

B450M/ac R2.0

4

1

N

FA

_

U

P

C

5

4-pin FAN cable

RGB LED Cable

1

FAN

CPU_

1

D

LE

_

N

FA

_

D

AM

+12V

*e diagram shown here are for reference only. Please refer to page 34 for the orientation of

AMD Fan LED Header (AMD_FAN_LED1).

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19

Installing the AM4 Box Cooler SR3

1

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20

2