Asrock B450M/ac User Manual

Version 1.0

Published May 2019

Copyright©2019 ASRock INC. All rights reser ved.

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 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 ww w.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 ty pe

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 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 qualit y

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cations and the BIOS soware might be updated, the
content of this manual will be subject to change without notice. In ca se any modica­tions of this manual occur, the updated version will be available on ASRock’s website
without further notice. If you require technical suppor t related to this motherboard,
please visit our website for spe cic information about the model you are using. You
may nd the l atest VGA cards and CPU suppor t list on ASRock’s website a s well.
ASRock website http://www.asrock.com.

1.1 Package Contents

ASRock B450M/ac Motherboard (Micro ATX Form Factor)

•

ASRock B450M/ac Quick Installation Guide

•

ASRock B450M/ac 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

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1

1.2 Specications

Platform

CPU

Chipset

Memory

•

•

•

•

•

•

•

•

•

•

•

•

* For Ryzen Series CPUs (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 24 for DDR4 UDIMM maximum frequency

support.

•

•

Micro ATX Form Factor

2oz Copper PCB

Solid Capacitor design

AMD AM4 Socket

Digi Power design

9 Power Phase design

AMD Promontory B450

Dual Channel DDR4 Memory Technology

4 x DDR4 DIMM Slots

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 (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 memory: 64GB

15μ Gold Contact in DIMM Slots

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2

Expansion
Slot

AMD Ryzen series CPUs (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)

•

AMD Ryzen series CPUs (Raven Ridge)

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

•

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

•

Graphics

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 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

B450M/ac

Audio

LAN

7.1 CH HD Audio with Content Protection (Realtek ALC892

•

Audio Codec)

Premium Blu-ray Audio support

•

Supports Surge Protection

•

ELNA Audio Caps

•

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

•

Supports PXE

•

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3

English

Wireless
LAN

Rear Panel
I/O

Storage

Connector

Intel® 802.11ac WiFi Module

•

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

•

Supports Dual-Band (2.4/5 GHz)

•

Supports high speed wireless connections up to 433Mbps

•

Supports Bluetooth 4.2 / 3.0 + High speed class II

•

2 x Antenna Ports

•

1 x HDMI Port

•

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 Summit Ridge, Raven Ridge and Pinnacle Ridge)

or Gen3 x2 (16 Gb/s) (with Athlon 2xxGE series APU)*

* Supports NVMe SSD as boot disks

* Supports ASRock U.2 Kit

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 ma ximum

1A (12W) fan power.

4

BIOS
Feature

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”

•

ACPI 5.1 compliance wake up events

•

Supports jumperfree

•

SMBIOS 2.3 support

•

DRAM Voltage multi-adjustment

•

B450M/ac

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 information, please visit our website: http://www.asrock .com

Please realiz e that the re is a certain r isk involved with o verclocking, including adjust­ing the setting in the BIOS, applying Untied Ove rclocking Technology, or using third­party o verclocking tools. Overclocking may aect your syste m’s stability, or even cause
damage to the components and dev ices of your system. It should be done at your own
risk and expe nse. We are not responsible for possible damage cau sed by overclocking.

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6

1.3 Motherboard Layout

5

10

1

14

12

11

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

SATA3_3

SATA3_4

SATA3_1

SATA3_2

23

HDMI 1

M2_WIFI

ADDR_LED1

1

RGB_HEADER1

B450M/ac

CI1

15

B450M/ac

3

2

4

6

7

8
9

BIOS
ROM

English

7

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)

10 SATA3 C onnector (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 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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8

1.4 I/O Panel

B450M/ac

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. Please 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 Technolog y

and ensures extraordinary low power consumption for PCs.

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

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10

WiFi Antennas Installation Guide

B450M/ac

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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11

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 be fore installing the CPU.

1

B450M/ac

2

English

13

3

English

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. Ma ke sure that the

CPU and the heatsink are securely fastened and in good contact with each other.

Please turn o th e power or remove the power cord before changing a CPU or heatsink.

Installing the CPU Box Cooler SR1

1

B450M/ac

2

English

15

3

English

16

4

1

N

FA

_

U

P

C

Installing the AM4 Box Cooler SR2

1

B450M/ac

2

English

17

3

English

18

B450M/ac

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 33 for the orientation of

AMD Fan LED Header (AMD_FAN_LED1).

English

19

Installing the AM4 Box Cooler SR3

1

English

20

2

B450M/ac

4

3

English

21

5

4-pin FAN cable

FAN1

CPU_

English

22

B450M/ac

6

1

N

FA

_
U
P

C

1

D

E

L

_

N

FA

_

D

AM

+12V

or

7

1

N

FA

_
U
P

C

1

D

E

L

_

N

FA

_

D

AM

5

_

B

S

U

Please note that only one cable should be used at a time in this step.

If you select AMD_FAN_LED1, please install ASRock utility "ASRock Polychrome SYNC".

If you select USB connector, please install AMD utility "SR3 Settings Soware".

*e diagram shown here are for reference only. Please refer to page 33 for the orientation of AMD Fan

LED Header (AMD_FAN_LED1) and page 30 for the orientation of AMD LED Fan USB Header (USB_7).

23

English

2.3 Installing Memory Modules (DIMM)

is motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots,

and supports Dual Channel Memory Technology.

1. For dual channel cong uration , you always need to in stall identical (the same

brand, speed , size and chip-type) DDR4 DIMM pairs.

2. It is unable to activate Du al Channel Memory Technology with only one or three
memory module installed.

3. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4
slot; otherwise, this motherboard and DIMM may be damaged.

4. We suggest that you install the memory modules on DDR4_A 2 and DDR4_B2 rst
for better DRAM compatibility on 2 DIMM s conguration.

AMD non-XMP Memory Frequency Support

Ryzen Series CPUs (Pinnacle Ridge):

English

UDIMM Memory Slot

A1 A2 B1 B2

Frequency

(Mhz)

- SR - - 2933

- DR - - 2933

- SR - SR 2933

- DR - DR 2933

SR SR SR SR 2933

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2133-2400

24

Ryzen Series CPUs (Summit Ridge):

B450M/ac

UDIMM Memory Slot

A1 A2 B1 B2

- SR - - 2667

- DR - - 2667

- SR - SR 2667

- DR - DR 2667

SR SR SR SR 2667

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2133-2400

Frequency

(Mhz)

Ryzen Series CPUs (Raven Ridge):

UDIMM Memory Slot

A1 A2 B1 B2

- SR - - 2933

- DR - - 2667

- SR - SR 2667

- DR - DR 2667

SR SR SR SR 2667

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2133-2400

Frequency

(Mhz)

SR: Single rank DIMM, 1Rx4 or 1R x8 on DIMM module label

DR: Dua l rank DIMM, 2Rx4 or 2R x8 on DIMM module label

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25

e DIMM only ts in one correct orie ntation. It will cause permanent dam age to
the motherboard and the DIMM if you force the DIMM into the slot at incor rect
orientation.

1

2

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26

3

2.4 Expansion Slots (PCI Express Slots)

ere are 2 PCI Express slots on the motherboard.

Before installing an ex pansion card, please make sure that the power supply is
switched o or the power cord is unplugged. Plea se read the documentation of the
expan sion card and mak e necessary h ardware settings for the card before you start
the installation.

PCIe slots:

PCIE1 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.

PCIE2 (PCIe 2.0 x16 slot) is used for PCI Express x4 lane width graphics cards.

PCIe Slot Congurations

PCIE1 PCIE2

Ryzen Series CPUs (Pinnacle Ridge) x16 x4

B450M/ac

Ryzen Series CPUs (Summit Ridge) x16 x4

Ryzen Series CPUs (Raven Ridge) x8 x4

Athlon 2x xGE series APU x4 x4

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27

2.5 Jumpers Setup

e illustration shows how jumpers are setup. When the jumper cap is placed on

the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper is

“O pen”.

Clear CMOS Jumper

(CLRMO S1)

(see p.7, No. 19)

CLRMOS1 allows you to clear the data in CMOS. To clear and reset the system

parameters to default setup, please turn o the computer and unplug the power

cord from the power supply. Aer waiting for 15 seconds, use a jumper cap to

short the pins on CLR MOS1 for 5 seconds. However, please do not clear the

CMOS right aer you update the BIOS. If you need to clear the CMOS when you

just nish updating the BIOS, you must boot up the system rst, and then shut it

down before you do the clear-CMOS action. Please be noted that the password,

date, time, and user default prole will be cleared only if the CMOS battery is

removed. Please remember toremove the jumper cap aer clearing the CMOS.

2-pin Jumper

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If you clear the CMOS, the case open may be detected. Pl ease adjust the BIOS option
“Clear Status” to clear the record of previou s chassis int rusion status.

2.6 Onboard Headers and Connectors

PLED+

1

Onboard headers and connectors are NOT jump ers. Do NOT place jumper caps over
these headers and connectors. Placing jumper caps over the headers and connectors
will cause permanent damage to the motherboard.

B450M/ac

System Panel Header

(9-pi n PANEL1)

(see p.7, No. 13)

PWRBTN (Power Button):

Connec t to the power button on the chassi s front panel. You may congure the way to
turn o your system using the power button.

RESET (Reset B utton):
Connec t to the reset button on the ch assi s front panel. P ress the reset button to
restar t the computer if the computer freezes an d fails to perform a nor mal restart.

PLED (Syste m Power LED):
Connec t to the power status indicator on the chas sis front panel. e LED i s on when
the system is ope rating. e LED keeps blinking when the system i s in S1/S3 sleep
state. e LED is o when the system is in S4 sleep state or powered o (S5).

HDLED (Ha rd Drive Activity LED):
Connec t to the hard drive ac tivity LED on the chassis front panel. e LED is on
when the hard drive i s reading or writing data.

e front panel de sign may dier by chassis. A front panel module mainly consists
of power button , reset button, power LED, hard dr ive activity LED, speak er and etc.
When connect ing your chassis front panel module to this head er, make sure the wire
assig nments and the pin assig nments are matched correctly.

PLED-

HDLED-

HDLED+

PWRBTN#

GND

RESET#

GND

GND

Connect the power

button, reset button and

system status indicator on

the chassis to this header

according to the pin

assignments below. Note

the positive and negative

pins before connecting

the cables.

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29

Power LED and Speaker

R

1

+5V

DUMMY

PLED+

PLED+

PLED-

DUMMY

SPEAKER

DUMMY

GND

GND

P+

P-

USB_PWR

P+

P-

USB_PWR

1

Header

(7-pin SPK_PLED1)

(see p.7, No. 14)

Please connect the

chassis power LED and

the chassis speaker to this

header.

Serial ATA3 Connectors

(SATA3_1:

see p.7, No. 12)

(SATA3_ 2:

see p.7, No. 11)

(SATA3_ 3:

see p.7, No. 9)

(SATA3_4:

see p.7, No. 10)

AMD LED Fan USB

Header

(4-pin USB_7)

(see p.7, No. 8)

USB 2.0 Headers

(9-pin USB_3_4)

(see p.7, No. 17)

(9-pin USB_5_6)

(see p.7, No. 18)

SATA3_3

SATA3_1

1

GND

P+

P-

USB_PW

ese four SATA3

connectors support SATA

SATA3_4

data cables for internal

storage devices with up to

6.0 Gb/s data transfer rate.

SATA3_2

is header is used for

connecting the USB

connector on the AMD

SR3 Heatsink.

ere are two headers

on this motherboard.

Each USB 2.0 header can

support two ports.

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30

B450M/ac

E

FA

J_SENSE

OUT2_L

1

MIC_RET

PRESENCE#

GND

OUT2_R

MIC2_R

MIC2_L

OUT_RET

USB 3.2 Gen1 Header

(19-pin USB3_5_6)

(see p.7, No. 7)

Front Panel Audio Header

(9-pin HD_ AUDIO1)

(see p.7, No. 22)

1. High Denition Audio support s Jack Sensing, but the panel wire on the cha ssis must
suppor t HDA to function correc tly. Please follo w the instructions in our manual and
chassis manual to install your system.

2. If you use an AC’97 audio panel , please install it to th e front panel audio header by
the steps below:
A. Connect Mic_IN (MIC) to MIC2_ L.
B. Conne ct Audio_R (RIN) to OUT2_R and Audio_ L (LIN) to OUT2_ L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_ RET and OUT_RET are for the HD audio panel only. You don’t ne ed to
connec t them for the AC’97 audio panel.
E. To activate the front mic, go to the “FrontMic” Tab in the Realtek Control panel
and adjust “Recording Volume”.

Vbus

IntA_PA_SSRX-

IntA_PA_SSRX+

GND

IntA_PA_SSTX-

IntA_PA_SSTX+

GND

IntA_PA_D-

IntA_PA_D+

VbusVbus

IntA_PB_SSRX-

IntA_PB_SSRX+

GND

IntA_PB_SSTX-

IntA_PB_SSTX+

GND

IntA_PB_D-

IntA_PB_D+

Dummy

1

ere is one header on

this motherboard. Each

USB 3.2 Gen1 header can

support two ports.

is header is for

connecting audio devices

to the front audio panel.

Chassis Fan Connector

(3-pi n CHA_FAN2)

(see p.7, No. 16)

GND

FAN_VOLTAG

N_SPEED

Please connect fan cable

to the fan connector and

match the black wire to

the ground pin.

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31

Chassis/Water Pump Fan

FAN_SPEED_CONTROL

4

FAN_SPEED_CONTROL

1 2 3 4

4

1

8 5

Signal

Connectors

(4-pin CHA_FAN2/WP)

(see p.7, No. 23)

CHA_FAN_SPEED

FAN_VOLTAGE

GND

is motherboard

3
2

provides one 4-Pin water

1

cooling

chassis

connectors. If you plan to

connect a 3-Pin

water cooler fan, please

connect it to Pin 1-3.

fan

chassis

English

CPU Fan Connector

(4-pin CPU_FAN1)

(see p.7, No. 2)

ATX Power Connector

(24-p i n ATX PWR1)

(see p.7, No. 6)

ATX 12V Power

Connector

(8-pin ATX12V1)

(see p.7, No. 1)

Chassis Intrusion Header

(2-pin CI1)

(see p.7, No. 15)

CPU_FAN_SPEED

FAN_VOLTAGE

GND

12

1

1

GND

is motherboard

provides a 4-Pin CPU fan

(Quiet Fan) connector.

If you plan to connect a

3-Pin CPU fan, please

connect it to Pin 1-3.

24

is motherboard pro-

vides a 24-pin ATX power

connector. To use a 20-pin

ATX power supply, please

plug it along Pin 1 and Pin

13

13.

is motherboard

provides a 8-pin ATX 12V

power connector. To use a

4-pin ATX power supply,

please plug it along Pin 1

and Pin 5.

is motherboard

supports CASE OPEN

detection feature that

detects if the chassis cove

has been removed. is

feature requires a chassis

with chassis intrusion

detection design.

32

B450M/ac

1

1

1

AMD FAN LED Header

(4- pi n AM D_FA N_

LED1)

(see p.7, No. 5)

RGB LED Header

(4-pi n RGB _HEA DER1)

(see p.7, No. 20)

+12V GRB

+12V GRB

AMD FAN LED Header is used

to connect RGB LED

extension cable that comes with

AMD heatsink. e cable

connection allows users to choose

from various LED lighting

eects.

Caution: Never install the FAN

LED cable in the wrong orienta-

tion; otherwise, the cable may

be damaged.

is RGB header is used to

connect RGB LED extension

cable which allows

users to choose from various LED

lighting eects.

Caution: Never install the RGB

LED cable in the wrong orienta-

tion; otherwise, the cable may

be damaged.

*Please refer to page 48 for

further instructions on this

header.

Addressable LED Header

(3-pin A DDR_LE D1)

(see p.7, No. 21)

VOUT

DO_ADDR

GND

is header is used to connect

Addressable

LED extension cable

which allows users to choose

from various LED lighting

eects.

Caution: Never install the

Addressable LED cable in the

wrong orientation; otherwise,

the cable may be damaged.

*Please refer to page 49 for

further instructions on this

header.

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33

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

The M.2, a lso known as the Next Generation Form Factor (NGFF), is a sma ll size a nd

versatile card edge connec tor t hat aims to replace mPCIe and mSATA. The Ult ra M.2

Socket (M2_1) supports 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).

Installing the M.2_SSD (NGFF) Module

Step 1

Prepare a M.2_SSD (NGFF) module

and the screw.

3

2

1

ABC

Step 2

Depending on the PCB type and

length of your M.2_SSD (NGFF)

module, nd the corresponding nut

location to be used.

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No. 1 2 3

Nut Location A B C

PCB Length 4.2cm 6cm 8cm

Module Type Type 224 2 Ty pe2260 Ty pe 2 28 0

B450M/ac

Step 3

Move the stando based on the

module type and length.

ABC

ABC

ABC

e stando is placed at the nut

location C by default. Skip Step 3

and 4 and go straight to Step 5 if you

are going to use the default nut.

Otherwise, release the stando by

hand.

Step 4

Peel o the yellow protective lm on

the nut to be used. Hand tighten the

stando into the desired nut location

on the motherboard.

Step 5

Gently insert the M.2 (NGFF) SSD

module into the M.2 slot. Please

be aware that the M.2 (NGFF) SSD

module only ts in one orientation.

ABC

o

20

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35

Step 6

Tighten the screw with a screwdriver

to secure the module into place.

NUT1NUT2

Please do not overtighten the screw

as this might damage the module.

M.2_SSD (NGFF) Module Support List

Vendor Interface P/N

Intel PCIe INTEL 6000P-SSDPEKKF256G7 (nvme)
Intel PCIe INTEL 6000P-SSDPEKKF512G7 (nvme)
Intel PCIe INTEL 600P-SSDPEKKW256G7-256GB (nvme)
Kingston PCIe Kingston SHPM2280P2 / 240G (Gen2 x4)
SanDisk PCIe SanDisk-SD6PP4M-128G(Gen2 x2)
Samsung PCIe Samsung XP941-MZHPU512HCGL(Gen2x4)

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for

details: http://www.asrock.com

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36

Chapter 3 Software and Utilities Operation

3.1 Installing Drivers

e Support CD that comes with the motherboard contains necessary drivers and

useful utilities that enhance the motherboard’s features.

Running The Support CD

To begin using the support CD, insert the CD into your CD-ROM drive. e CD

automatically displays the Main Menu if “AUTORUN” is enabled in your computer.

If the Main Menu does not appear automatically, locate and double click on the le

“ASRSETUP.EXE” in the Support CD to display the menu.

Drivers Menu

e drivers compatible to your system will be auto-detected and listed on the

support CD driver page. Please click Install All or follow the order from top to

bottom to install those required drivers. erefore, the drivers you install can work

properly.

Utilities Menu

e Utilities Menu shows the application soware that the motherboard supports.

Click on a specic item then follow the installation wizard to install it.

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37

English

3.2 A-Tuning

A-Tuning is ASRock’s multi purpose soware suite with a new interface, more new

features and improved utilities.

3.2.1 Installing A-Tuning

A-Tu ni n g can be downloaded from ASRock Live Update & APP Shop. Aer the

installation, you will nd the icon “A-Tu n i ng“ on your desktop. Double-click the

“A-Tu ni n g“ icon, A-Tu n i n g main menu will pop up.

3.2.2 Using A-Tuning

ere are ve sections in A-Tuning main menu: Operation Mode, OC Tweaker,

System Info, FAN-Tastic Tuning and Settings.

Operation Mode

Choose an operation mode for your computer.

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38

OC Tw eaker

Congurations for overclocking the system.

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System Info

View information about the system.

*e System Browser tab may not appear for certain models.

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39

FAN-Tastic Tuning

Congure up to ve dierent fan speeds using the graph. e fans will automatically shi

to the next speed level when the assigned temperature is met.

Settings

Congure ASRock A-Tuning. Click to select "Auto run at Windows Startup" if you

want A-Tuning to be launched when you start up the Windows operating system.

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40

3.3 ASRock Live Update & APP Shop

e ASRock Live Update & APP Shop is an online store for purchasing and

downloading soware applications for your ASRock computer. You can quickly and

easily install various apps and support utilities. With ASRock Live Update & APP

Shop, you can optimize your system and keep your motherboard up to date simply

with a few clicks.

Double-click on your desktop to access ASRock Live Update & APP Shop
utility.

*You need to be connected to the Internet to download apps f rom the ASRock Live Update & APP Shop.

3.3.1 UI Overview

B450M/ac

Category Panel

Information Panel

Category Panel: e category panel contains several category tabs or buttons that

when selected the information panel below displays the relative information.

Information Panel: e information panel in the center displays data about the

currently selected category and allows users to perform job-related tasks.

Hot News: e hot news section displays the various latest news. Click on the image

to visit the website of the selected news and know more.

Hot News

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3.3.2 Apps

When the "Apps" tab is selected, you will see all the available apps on screen for you

to download.

Installing an App

Step 1

Find the app you want to install.

e most recommended app appears on the le side of the screen. e other various

apps are shown on the right. Please scroll up and down to see more apps listed.

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42

You can check the price of the app and whether you have already intalled it or not.

- e red icon displays the price or "Free" if the app is free of charge.

- e green "Installed" icon means the app is installed on your computer.

Step 2

Click on the app icon to see more details about the selected app.

Step 3

If you want to install the app, click on the red icon to start downloading.

Step 4

When installation completes, you can nd the green "Installed " icon appears on the

upper right corner.

B450M/ac

To uninstall it, simply click on the trash can icon .
*e trash icon may not appear for certain apps.

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43

Upgrading an App

You can only upgrade the apps you have already installed. When there is an

available new version for your app, you will nd the mark of "New Version"

appears below the installed app icon.

Step 1

Click on the app icon to see more details.

Step 2

Click on the yellow icon to start upgrading.

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44

3.3.3 BIOS & Drivers

Installing BIOS or Drivers

When the "BIOS & Drivers" tab is selected, you will see a list of recommended or

critical updates for the BIOS or drivers. Please update them all soon.

B450M/ac

Step 1

Please check the item information before update. Click on to see more details.

Step 2

Click to select one or more items you want to update.

Step 3

Click Update to start the update process.

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45

3.3.4 Setting

In the "Setting" page, you can change the language, select the server location, and

determine if you want to automatically run the ASRock Live Update & APP Shop

on Windows startup.

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46

B450M/ac

1

3.5 ASRock Polychrome SYNC

ASRock Polychrome SYNC is a lighting control utility specically designed for unique indi-

viduals with sophisticated tastes to build their own stylish colorful lighting system. Simply by

connecting the LED strip, you can customize various lighting schemes and patterns, including

Static, Breathing, Strobe, Cycling, Music, Wave and more.

Connecting the LED Strip

Connect your RGB LED strip to the

RGB LED Header (RGB_HEADE R1)

1

B

R

G

V

2

1

on the motherboard.

B450M/ac

RGB_HEADER1

+12V GRB

1. Ne ver install the RGB LED cabl e in the wrong orientation; otherwise, the cable may be
damaged.

2. Before installing or remov ing your RGB LED cable, plea se power o your system and
unplug the power cord from the power supply. Failure to do so may c ause damages to
motherboard components.

1. Please note that the RGB LED str ips do not come with the pack age.

2. e RGB LED head er supports s tandard 5050 RGB LED s trip (12V/G/R/B), with a

maximum power rating of 3A (12V) and length within 2 meters.

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47

Connecting the Addressable RGB LED Strip

D

1

Connect your

the motherboard.

Addressable RGB LED

strip to the

Addressable LED Header (ADDR_ LED1)

ADDR_LED1

DO_ADDR

VOUT

B450M/ac

1

1. Ne ver install the RGB LED cabl e in the wrong orientation; otherwise, the cable may be
damaged.

2. Before installing or remov ing your RGB LED cable, plea se power o your system and
unplug the power cord from the power supply. Failure to do so may c ause damages to
motherboard components.

on

GN

1. Please note that the RGB LED str ips do not come with the pack age.

2. e RGB LED head er supports WS2812B addre ssable RGB LED str ip (5V/Data/

GND), with a ma ximum power rating of 3A (5V) and length within 2 meters.

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48

ASRock Polychrome SYNC Utility

Now you can adjust the RGB LED color through the ASRock Polychrome SYNC Utility.

Download this utility from the ASRock Live Update & APP Shop and start coloring your

PC style your way!

Drag the tab to customize your

preference.

Toggle on/o the

RGB LED switch

Sync RGB LED eects

for all LED regions of

the motherboard

Select a RGB LED light eect

from the drop-down menu.

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49

English

Chapter 4 UEFI SETUP UTILITY

4.1 Introduction

is section explains how to use the UEFI SETUP UTILITY to congure your

system. You may run the UEFI SETUP UTILITY by pressing <F2> or <Del> right

aer you power on the computer, other wise, the Power-On-Self-Test (POST) will

continue with its test routines. If you wish to enter the UEFI SETUP UTILITY aer

POST, restart the system by pressing <Ctl> + <Alt> + <Delete>, or by pressing the

reset button on the system chassis. You may also restart by turning the system o

and then back on.

Becau se the UEFI soware is constantly being upd ated, the following UEFI setup
screens and de scriptions are for refe rence purpose only, and they may not exactly
match what you see on your scre en.

4.1.1 UEFI Menu Bar

e top of the screen has a menu bar with the following selections:

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50

Main

OC Tweaker

Advanced

Tool

H/W Monitor

Security

Boot

Exit

For setting system time/date information

For overclocking congurations

For advanced system congurations

Useful tools

Displays current hardware status

For security settings

For conguring boot settings and boot priority

Exit the current screen or the UEFI Setup Utility

4.1.2 Navigation Keys

Use < > key or < > key to choose among the selections on the menu bar, and

use < > key or < > key to move the cursor up or down to select items, then

press <Enter> to get into the sub screen. You can also use the mouse to click your

required item.

Please check the following table for the descriptions of each navigation key.

Navigation Key(s) Description

B450M/ac

+ / -

<Tab>

<PGUP>

<PGDN>

<HOME>

<END>

<F1>

<F7>

<F9>

<F10>

<F12>

<ESC>

To change option for the selected items

Switch to next function

Go to the previous page

Go to the next page

Go to the top of the screen

Go to the bottom of the screen

To display the General Help Screen

Discard changes and exit the SETUP UTILITY

Load optimal default values for all the settings

Save changes and exit the SETUP UTILITY

Print screen

Jump to the Exit Screen or exit the current screen

51

English

4.2 Main Screen

When you enter the UEFI SETUP UTILITY, the Main screen will appear and

display the system overview.

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52

4.3 OC Tweaker Screen

In the OC Tweaker screen, you can set up overclocking features.

B450M/ac

Becau se the UEFI soware is constantly being upd ated, the following UEFI setup
screens and de scriptions are for refe rence purpose only, and they may not exactly
match what you see on your scre en.

CPU Conguration

Overclock Mode

Select the overclock mode.

Spread Spectrum

Enable Spread Spectrum to reduce electromagnetic interference for passing EMI

tests. Disable to achieve higher clock speeds when overclocking.

CPU Frequency and Voltage Change

If this item is set to [Manual], the multiplier and voltage will be set based on user selection.

Final result is depending on the CPU's capability.

SOC Voltage(VIO)

Use this to select SOC Voltage.

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53

SMT Mode

is item can be used to disable symmetric multithreading. To re-enable SMT, a

power cycle is needed aer selecting [Auto].

Warning: S3 is not supported on systems where SMT is disabled.

DRAM Timing Conguration

DRAM Frequency

If [Auto] is selected, the motherboard will detect the memory module(s) inserted

and assign the appropriate frequency automatically.

GTX Conguration

GTX Clock Frequency

Use this to congure the GTX clock frequency.

GTX Core Voltage

Use this to select the GTX Core Voltage.

Voltage Conguration

Vcore Oset Voltage

Use this to select Vcore Oset Voltage.

Vcore NB Oset Voltage

Use this to select Vcore NB Oset Voltage.

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DRAM Voltage

Use this to select DRAM Voltage. e default value is [Auto].

1.8 Voltage

Use this to select 1.8 Voltage. e default value is [Auto].

VDDP

Congure the voltage for the VDDP.

Save User Default

Type a prole name and press enter to save your settings as user default.

Load User Default

Load previously saved user defaults.

Save User UEFI Setup Prole to Disk

It helps you to save current UEFI settings as an user prole to disk.

Load User UEFI Setup Prole from Disk

You can load previous saved prole from the disk.

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English

4.4 Advanced Screen

In this section, you may set the congurations for the following items: CPU

Conguration, North Bridge Conguration, South Bridge Conguration, Storage-

Conguration, ACPI Conguration, Trusted Computing , AMD CBS and AMD

PBS.

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56

Setting wrong values in this sec tion may cause the system to malfunction.

UEFI Conguration

Active Page on Entry

Select the default page when entering the UEFI setup utility.

Full HD UEFI

When [Auto] is selected, the resolution will be set to 1920 x 1080 if the monitor

supports Full HD resolution. If the monitor does not support Full HD resolution,

then the resolution will be set to 1024 x 768. When [Disable] is selected, the

resolution will be set to 1024 x 768 directly.

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4.4.1 CPU Conguration

Cool 'n' Quiet

Use this item to enable or disable AMD’s Cool ‘n’ QuietTM technology. e default value is

[Enabled]. Conguration options: [Enabled] and [Disabled]. If you install Windows® OS and

want to enable this function, please set this item to [Enabled]. Please note that enabling this

function may reduce CPU voltage and memory frequency, and lead to system stability or

compatibility issue with some memory modules or power supplies. Please set this item to

[Disable] if above issue occurs.

AMD fTPM Switch

Use this to enable or disable AMD CPU fTPM.

SVM Mode

When this option is set to [Enabled], a VMM (Virtual Machine Architecture) can

utilize the additional hardware capabilities provided by AMD-V. e default value is

[Enabled]. Conguration options: [Enabled] and [Disabled].

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57

4.4.2 North Bridge Conguration

SR-IOV Support

Enable/disable the SR-IOV (Single Root IO Virtualization Support) if the system

has SR-IOV capable PCIe devices.

UMA Frame Buer size

is item controls the amount of system memory that is allocated to the integrated

graphics processor when the system boots up.

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58

4.4.3 South Bridge Conguration

Onboard HD Audio

Enable/disable onboard HD audio. Set to Auto to enable onboard HD audio and

automatically disable it when a sound card is installed.

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Front Panel

Enable/disable front panel HD audio.

Deep Sleep

Congure deep sleep mode for power saving when the computer is shut down.

Restore on AC/Power Loss

Select the power state aer a power failure. If [Power O] is selected, the power will

remain o when the power recovers. If [Power On] is selected, the system will start

to boot up when the power recovers.

WAN Radio

Enable/disable the WiFi module's connectivity.

BT On/O

Enable/disable the bluetooth.

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4.4.4 Storage Conguration

SATA Controller(s)

Enable/disable the SATA controllers.

SATA M o de

AHCI: Supports new features that improve performance.

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RAID: Combine multiple disk drives into a logical unit.

SATA Hot Plug

Enable/disable the SATA Hot Plug function.

4.4.5 ACPI Conguration

Suspend to RAM

It is recommended to select auto for ACPI S3 power saving.

B450M/ac

ACPI HPET Table

Enable the High Precision Event Timer for better performance and to pass WHQL

tests.

PS/2 Keyboard Power On

Allow the system to be waked up by a PS/2 Keyboard.

PCIE Devices Power On

Allow the system to be waked up by a PCIE device and enable wake on LAN.

RTC Alarm Power On

Allow the system to be waked up by the real time clock alarm. Set it to By OS to let

it be handled by your operating system.

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4.4.6 Trusted Computing

Security Device Support

Enable to activate Trusted Platform Module (TPM) security for your hard disk

drives.

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4.4.7 AMD CBS

Zen Common Options

RedirectForReturnDis

B450M/ac

From a workaround for GCC/C000005 issue for XV Core on CZ A0, setting MSRC001_1029

Decode Conguration (DE_CFG) bit 14 [DecfgNoRdrctForReturns] to 1.

L2 TLB Associativity

0 - L2 TLB ways [11:8] are fully associative. 1 - =L2 TLB ways [11:8] are 4K-only.

Platform rst Error Handling

Enable/disable PFEH, cloak individual banks, and mask deferred error interrupts from each

bank.

Core Performance Boost

Disable CPB.

Enable IBS

Enables IBS through MSRC001_1005[42] and disables SpecLockMap through

MSRC001_1020[54].

Global C-state Control

Controls IO based C-state generation and DF C-states.

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Opcache Control

Enables or disables the Opcache.

OC Mode

OC1 - 16 cores/3.6GHz on 1.3375V

OC2 - 8 cores/3.7GHz on 1.369V

OC3 - 4 cores/3.75GHz on 1.374V\nMax Stress - 16 cores/3.8GHz on 1.400V

SEV-ES ASID Space Limit

SEV VMs using ASIDs below the SEV-ES ASID Space Limit must enable the SEV-ES feature.

e valid values for this eld are from 0x1 (1) - 0x10 (16).

Core/Thread Enablement

Downcore control

Sets the number of cores to be used. Once this option has been used to remove any cores, a

POWER CYCLE is required in order for future selections to take eect.

SMTEN

is item can be used to disable symmetric multithreading. To re-enable SMT, a POWER

CYCLE is needed aer selecting the 'Auto' option.

Warning: S3 is NOT SUPPORTED on systems where SMT is disabled.

Streaming Stores Control

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Enables or disables the streaming stores functionality.

DF Common Options

DRAM scrub time

Provide a value that is the number of hours to scrub memory.

Redirect scrubber control

Control DF::RedirScrubCtrl[EnRedirScrub]

Disable DF sync ood propagation

Control DF::PIECong[DisSyncFloodProp].

Freeze DF module queues on error

Controls DF::PIECong[DisImmSyncFloodOnFatalError]

Disabling this option sets DF:PIECong[DisImmSyncFloodOnFatalError].

B450M/ac

GMI encryption control

GMI encryption control

Control GMI link encryption

xGMI encryption control

Control xGMI link encryption

CC6 memory region encryption

Control whether or not the CC6 save/restore memory is encry pted

Location of private memory regions

Controls whether or not the private memory regions (PSP, SMU and CC6) are at the top of

DRAM or distributed. Note that distributed requires memory on all dies. Note that it will

always be at the top of DRAM if some dies don't have memory regardless of this option's

setting.

System probe lter

Controls whether or not the probe lter is enabled. Has no eect on parts where the probe

lter is fuse disabled.

Memory interleaving

Controls fabric level memory interleaving (AUTO, none, channel, die, socket). Note that

channel, die, and socket has requirements on memory populations and it will be ignored if

the memory doesn't support the selected option.

Memory interleaving size

Controls the memory interleaving size. e valid values are AUTO, 256 bytes, 512 bytes, 1

Kbytes or 2Kby tes. is determines the starting address of the interleave (bit 8, 9, 10 or 11).

Channel interleaving hash

Controls whether or not the address bits are hashed during channel interleave mode. is

eld should not be used unless the interleaving is set to channel and the interleaving size is

256 or 512 bytes.

Memory Clear

When this feature is disabled, BIOS does not implement MemClear aer memory training

(only if non-ECC DIMMs are used).

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UMC Common Options

DDR4 Common Options

DRAM Controller Conguration

DRAM Controller Conguration

DRAM Power Options

Cmd2T

Select between 1T and 2T mode on ADDR/CMD

Gear Down Mode

Congure the Gear Down Mode.

CAD Bus Conguration

CAD Bus Timing User Controls

Setup time on CAD bus signals to Auto or Manual

CAD Bus Drive Strength User Controls

Drive Strength on CAD bus signals to Auto or Manual

Data Bus Conguration

Data Bus Conguration User Controls

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Specif y the mode for drive strength to Auto or Manual

Common RAS

Data Poisoning

Enable/disable data poisoning: UMC_CH::EccCtrl[UcFatalEn] UMC_

CH::EccCtrl[WrEccEn]

Should be enabled/disabled together.

Security

TSME

Transparent SME: AddrTweakEn = 1; ForceEncrEn =1; DataEncrEn = 0

Data Scramble

Data scrambling: DataScrambleEn

DRAM Memory Mapping

Chipselect Interleaving

Interleave memory blocks across the DRAM chip selects for node 0.

BankGroupSwap

Congure the BankGroupSwap.

BankGroupSwapAlt

Congure BankGroupSwapAlt.

Address Hash Bank

Congure the bank address hashing.

Address Hash CS

Congure the CS address hashing.

NVDIMM

Memory MBIST

MBIST Enable

B450M/ac

Congure the Memory MBIST.

MBIST SubType Test

Select MBIST Subtest - Single Chipselect, Multi Chipselect, Address Line Test or execute

All test

MBIST Aggressors

Enable or disable MBIST Aggressor test.

MBIST Per Bit Slave Die Reporting

Enable or disable MBIST per bit slave die result report.

NBIO Common Options

NB Conguration

IOMMU

Use this to enable or disable IOMMU. e default value of this feature is [Disabled].

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Determinism Slider

[Auto]

Use default performance determinism settings

cTDP Control

[Auto]

Use the fused cTDP.

[Manual]

User can set customized cTDP.

Fan Control

[Auto]

Use the default fan controller settings.

[Manual]

User can set customized fan controller settings.

PSI

Disable PSI.

ACS Enable

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Enable ACS.

PCIe ARI Support

Enables Alternative Routing-ID Interpretation

CLDO_VDDP Control

[Manual]

If this option is selected, user can set customized CLDO_VDDP voltage.

HD Audio Enable

Enable HD Audio.

FCH Common Options

SATA Conguration Options

SATA Controller

Disable or enable OnChip SATA controller

Sata RAS Support

Disable or enable Sata RAS Support

Sata Disabled AHCI Prefetch Function

Congure the Sata Disabled AHCI Prefetch function.

Aggresive SATA Device Sleep Port 0

Congure the Aggresive SATA Device Sleep Port 0.

Aggresive SATA Device Sleep Port 1

Congure the Aggresive SATA Device Sleep Port 1.

USB Conguration Options

XHCI controller enable

Congure the USB3 controller.

SD (Secure Digital) Options

B450M/ac

SD Conguration Mode

Select SD Mode.

Ac Power Loss Options

Select Ac Loss Control Method.

I2C Conguration Options

Uart Conguration Options

ESPI Conguration Options

XGBE Conguration Options

eMMC Options

NTB Common Options

DRAM Memory Mapping

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Chipselect Interleaving

Interleave memory blocks across the DRAM chip selects for node 0.

BankGroupSwap

Congure the BankGroupSwap.

BankGroupSwapAlt

Congure the BankGroupSwapAlt.

Address Hash Bank

Congure the bank address hashing.

Address Hash CS

Congure the CS address hashing.

NVDIMM

Memory MBIST

MBIST Enable

Congure the Memory MBIST.

MBIST SubType Test

Select MBIST Subtest - Single Chipselect, Multi Chipselect, Address Line Test or execute

all test.

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MBIST Aggressors

Congure the MBIST Aggressor test.

MBIST Per Bit Slave Die Reporting

Congure the MBIST per bit slave die result report.

4.4.8 AMD PBS

e AMD PBS menu accesses AMD specic features.

B450M/ac

71

English

4.5 Tools

RGB LED

ASRock Polychrome SYNC allows you to adjust the RGB LED color to your liking.

Easy RAID Installer

Easy R AID Installer helps you to copy the R AID driver from the support CD to

your USB storage device. Aer copying the drivers please change the SATA mode to

RAID, then you can start installing the operating system in RAID mode.

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SSD Secure Erase Tool

Use this tool to securely erase SSD.

Instant Flash

Save UEFI les in your USB storage device and run Instant Flash to update your

UEFI.

4.6 Hardware Health Event Monitoring Screen

is section allows you to monitor the status of the hardware on your system,

including the parameters of the CPU temperature, motherboard temperature, fan

speed and voltage.

B450M/ac

CPU Fan 1 Setting

Select a fan mode for CPU Fan 1, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

CPU Fan 1 Temp Source

Select a fan temperature source for CPU Fan 1.

Chassis Fan 1 Setting

Select a fan mode for Chassis Fan 1, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

Chassis Fan 1 Temp Source

Select a fan temperature source for Chassis Fan 1.

Over Temperature Protection

When Over Temperature Protection is enabled, the system automatically shuts

down when the motherboard is overheated.

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Case Open Feature

Enable or disable Case Open Feature to detect whether the chassis cover has been

removed.

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4.7 Security Screen

In this section you may set or change the supervisor/user password for the system.

You may also clear the user password.

Supervisor Password

Set or change the password for the administrator account. Only the administrator

has authority to change the settings in the UEFI Setup Utility. Leave it blank and

press enter to remove the password.

B450M/ac

User Password

Set or change the password for the user account. Users are unable to change the

settings in the UEFI Setup Utility. Leave it blank and press enter to remove the

password.

Secure Boot

Enable to support Secure Boot.

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4.8 Boot Screen

is section displays the available devices on your system for you to congure the

boot settings and the boot priority.

Fast Boot

Fast Boot minimizes your computer's boot time. In fast mode you may not boot

from an USB storage device.

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Boot From Onboard LAN

Allow the system to be waked up by the onboard LAN.

Setup Prompt Timeout

Congure the number of seconds to wait for the setup hot key.

Bootup Num-Lock

Select whether Num Lock should be turned on or o when the system boots up.

Boot Beep

Select whether the Boot Beep should be turned on or o when the system boots up. Please

note that a buzzer is needed.

Full Screen Logo

Enable to display the boot logo or disable to show normal POST messages.

AddOn ROM Display

Enable AddOn ROM Display to see the AddOn ROM messages or congure the

AddOn ROM if you've enabled Full Screen Logo. Disable for faster boot speed.

Above 4G Decoding

Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space

(only if the system supports 64 bit PCI decoding).

CSM (Compatibility Support Module)

B450M/ac

CSM

Enable to launch the Compatibility Support Module. Please do not disable unless

you’re running a WHCK test.

Launch PXE OpROM Policy

Select UEFI only to run those that support UEFI option ROM only. Select Legacy

only to run those that support legacy option ROM only. Select Do not launch to not

execute both legacy and UEFI option ROM.

Launch Storage OpROM Policy

Select UEFI only to run those that support UEFI option ROM only. Select Legacy

only to run those that support legacy option ROM only. Select Do not launch to not

execute both legacy and UEFI option ROM.

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4.9 Exit Screen

Save Changes and Exit

When you select this option the following message, “Save conguration changes

and exit setup?” will pop out. Select [OK] to save changes and exit the UEFI SETUP

UTILITY.

Discard Changes and Exit

When you select this option the following message, “Discard changes and exit

setup?” will pop out. Select [OK] to exit the UEFI SETUP UTILITY without saving

any changes.

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Discard Changes

When you select this option the following message, “Discard changes?” will pop

out. Select [OK] to discard all changes.

Load UEFI Defaults

Load UEFI default values for a ll options. e F9 key can be used for this operation.

Launch EFI Shell from lesystem device

Copy shellx64.e to the root directory to launch EFI Shell.

Contact Information

If you need to contact ASRock or want to know more about ASRock, you’re welcome

to visit ASRock’s website at http://ww w.asrock.com; or you may contact your dealer

for further information. For technical questions, please submit a support request

form at https://event.asrock.com/tsd.asp

ASRock Incorporation

2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District,

Taipei City 112, Taiwan (R.O.C.)

ASRock EUROPE B.V.

Bijsterhuizen 11-11

6546 AR Nijmegen

e Netherlands

Phone: [phone]

Fax: [phone]

ASRock America, Inc.

13848 Magnolia Ave, Chino, CA91710

U.S.A.

Phone: [phone]

Fax: [phone]

DECLARATION OF CONFORMITY

Per FCC Part 2 Section 2.1077(a)

Responsible Party Name: ASRock Incorporation

Address:

Phone/FaxNo:

hereby declares that the product

Product Name : Motherboard

13848 Magnolia Ave, Chino, CA91710

[phone]/[phone]

Model Number :

Conforms to the following specications:

FCC Part 15, Subpart B, Unintentional Radiators

Supplementary Information:

B450M/ac

is device complies with part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) is device may not cause harmful interference,

and (2) this device must accept any interference received, including interference

that may cause undesired operation.

James

Representative Person’s Name:

Signature :

Date :

May 12, 2017

EU Declaration of Conformity

EMC —Directive 2014/30/EU (from April 20th, 2016)

ڛ

(EU conformity marking)

For the following equipment:

Motherboard

(Product Name)

B450M/ac/ ASRock

(Model Designation / Trade Name)

ASRock Incorporation

(Manufacturer Name)

2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District, Taipei City 112, Taiwan (R.O.C.)

(Manufacturer Address)

☐ EN 55022:2010/AC:2011 Class B EN 55024:2010/A1:2015

ڛ EN 55032:2012+AC:2013 Class B ڛ
ڛ EN 61000-3-2:2014

ڛ RED

ڛ RoHS — Directive 2011/65/EU
ڛ CE marking

—

Directive 2014/53/EU

EN 300 328 V2.1.1 EN 301 489-17 V3.1.1

☐
☐

EN 301 893 V2.1.1 ☐ EN 301 489-3 V2.1.1

☐ EN 300 220 V3.1.1

☐

LVD —Directive 2014/35/EU (from April 20th, 2016)

☐

EN 60950-1 : 2011+ A2: 2013 ☐ EN 60950-1 : 2006/A12: 2011

ASRock EUROPE B.V.

(Company Name)

Bijsterhuizen 1111 6546 AR Nijmegen e Netherlands

(Company Address)

Person responsible for making this declaration:

(Name, Surname)

A.V.P

(Position / Title)

May 31, 2019

(Date)

P/N: 15G062159000AK V1.0

ڛ

EN 61000-3-3:2013

ڛ