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 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
: +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 6
1.4 I/O Panel 8
Chapter 2 Installation 10
2.1 Installing the CPU 11
2.2 Installing the CPU Fan and Heatsink 13
2.3 Installing Memory Modules (DIMM) 21
2.4 Expansion Slots (PCI Express Slots) 24
2.5 Jumpers Setup 25
2.6 Onboard Headers and Connectors 26
2.7 M.2_SSD (NGFF) Module Installation Guide 30
Chapter 3 Software and Utilities Operation 34
3.1 Installing Drivers 34
3.2 A-Tuning 35
3.2.1 Installing A-Tuning 35
3.2.2 Using A-Tuning 35
3.3 ASRock Live Update & APP Shop 38
3.3.1 UI Overview 38
3.3.2 Apps 39
3.3.3 BIOS & Drivers 42
3.3.4 Setting 43
Chapter 4 UEFI SETUP UTILITY 44
4.1 Introduction 44
4.1.1 UEFI Menu Bar 44
4.1.2 Navigation Keys 45
4.2 Main Screen 46
4.3 OC Tweaker Screen 47
4.4 Advanced Screen 49
4.4.1 CPU Conguration 50
4.4.2 North Bridge Conguration 51
4.4.3 South Bridge Conguration 52
4.4.4 Storage Conguration 53
4.4.5 Super IO Conguration 54
4.4.6 ACPI Conguration 55
4.4.7 Trusted Computing 56
4.4.8 AMD CBS 57
4.4.9 AMD PBS 65
4.5 Tools 66
4.6 Hardware Health Event Monitoring Screen 68
4.7 Security Screen 70
4.8 Boot Screen 71
4.9 Exit Screen 73
Chapter 1 Introduction
ank you for purchasing ASRock B450M-HDV 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.
Becau se the motherboard specications and the BIOS soware might be updated, the
content of this manual will be subject to change without notice. In ca se any modications 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 cic information about the model you are using. You
may nd the l atest VGA cards and CPU support list on ASRock ’s website a s well.
ASRock website http://www.a srock .com.
1.1 Package Contents
ASRock B450M-HDV Motherboard (Micro ATX Form Factor)
•
ASRock B450M-HDV Quick Installation Guide
•
ASRock B450M-HDV Support CD
•
2 x Serial ATA (SATA) Data Cables (Optional)
•
1 x Screw for M.2 Socket (Optional)
•
1 x I/O Panel Shield
•
B450M-HDV
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1
1.2 Specications
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 21 for DDR4 UDIMM maximum
frequency support.
•
•
Micro ATX Form Factor
Solid Capacitor design
AMD AM4 Socket
Digi Power design
7 Power Phase design
Supports CPU up to 105W
AMD Promontory B450
Dual Channel DDR4 Memory Technology
2 x DDR4 DIMM Slots
AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4
Please realize that the re is a certain r isk involved with overclo cking, including
adjusting the setting in the BIOS, applying Untied Overclocking Technol ogy, or using
third-party overclocking tool s. Overclocking may aect your system’s stability, or
even cause dam age to the components and devices of your system. It should be done
at your own risk and expense. We are not responsible for poss ible damage caused by
overclocking.
•
FCC, CE
•
ErP/EuP ready (ErP/EuP ready power supply is required)
** To congure 7.1 CH HD Audio, it i s required to use an HD front panel audio module and enable the multichannel audio feature through the audio driver.
Please set Speaker Conguration to “7.1 Speaker”in the Realtek HD Audio Manager.
B450M-HDV
Function of the Audio Por ts in 7.1-channel Con guration:
PortFunction
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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Chapter 2 Installation
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.
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2.1 Installing the CPU
Unplug all power cables be fore installing the CPU.
1
B450M-HDV
2
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11
3
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12
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. Ma ke 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 heatsink.
Installing the CPU Box Cooler SR1
1
B450M-HDV
2
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13
3
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14
4
4-pin FAN cable
1
N
FA
_
U
P
C
Installing the AM4 Box Cooler SR2
1
B450M-HDV
2
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15
3
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16
B450M-HDV
4
4-pin FAN cable
1
N
FA
_
U
P
C
17
English
Installing the AM4 Box Cooler SR3
1
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18
2
B450M-HDV
4
3
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5
4-pin FAN cable
CPU_FAN1
6
English
USB 2.0 Header
B
S
U
Please note that this connector is the interface to the LED control board on the SR3, it requires the AMD
utility "SR3 Settings Soware" to control the LED.
*e diagram shown here are for reference only. Please refer to page 27 for the orientation of USB Header.
20
1
N
FA
_
U
P
C
2.3 Installing Memory Modules (DIMM)
is motherboard provides two 288-pin DDR4 (Double Data Rate 4) DIMM slots,
and supports Dual Channel Memory Technology.
1. For dual channel conguration, you always need to install ide ntical (the same
brand, speed , size and chip-type) DDR4 DIMM pairs.
2. It i s unable to activate Dual Channe l Memory Technolog y with only one memory
module instal led.
3. It i s not allowed to in stall a DDR, DDR2 or DDR3 memor y module into a DDR4
slot; otherwise, this motherboard and DIMM may be damaged.
DDR4 UDIMM Maximum Frequency Support
Ryzen Series CPUs (Pinnacle Ridge):
B450M-HDV
UDIMM Memory Slot
A1B1
-SR2667
SR-2667
-DR2400
DR-2400
SRSR2667
DRDR2400
Frequency
(Mhz)
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Ryzen Series CPUs (Summit Ridge):
UDIMM Memory Slot
A1B1
-SR2667
SR-2667
-DR2667
DR-2667
SRSR2667
DRDR2667
Ryzen Series CPUs (Raven Ridge):
UDIMM Memory Slot
A1B1
-SR2933
SR-2933
-DR2667
DR-2667
SRSR2667
DRDR2400
Frequency
(Mhz)
Frequency
(Mhz)
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SR: Single rank DIMM, 1Rx4 or 1R x8 on DIMM module label
DR: Dua l ran k DIMM, 2Rx4 or 2R x8 on DIMM module label
B450M-HDV
e DIMM only ts in one correct orientation. It will cause permanent dam age to
the mothe rboard and the DIMM if you force the DIMM into the slot at incor rect
orientation .
1
2
3
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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 hardware settings for the card before you start
the installation.
PCIe slots:
PCIE1 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIe Slot Congurations
PCIE1PCIE2
Ryzen Series CPUs (Pinnacle Ridge)x1x16
Ryzen Series CPUs (Summit Ridge)x1x16
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Ryzen Series CPUs (Raven Ridge)
x1x8
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 “Open”. e illustration shows a 3-pin jumper whose pin1 and pin2 are “Short”
when a jumper cap is placed on these 2 pins.
Clear CMOS Jumper
(CLRCMOS1)
(see p.6, No. 12)
CLRCMOS1 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. Aer waiting for 15 seconds, use a jumper cap to
short pin2 and pin3 on CLRCMOS1 for 5 seconds. However, please do not clear
the CMOS right aer 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 prole will be cleared only if the CMOS battery is
removed.
Clear CMOSDefault
B450M-HDV
If you clear the CMOS, the case open may be detec ted. Please adjust the BIOS option
“Clear Status” to clear the record of previou s chassis intrusion status.
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2.6 Onboard Headers and Connectors
Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over
these header s and connectors. Placing jumper caps over the headers and connectors
will cause permanent damage to the motherboard.
System Panel Header
(9-pin PANEL1)
(see p.6, No. 13)
PWRBTN (Power Switch):
Connec t to the power switch on the chassi s front panel. You may congure the way to
turn o your system using the power switch.
RESET (Reset Switch):
Connec t to the reset switch on the chassi s front panel. P ress the reset sw itch to restart
the computer if the compute r freezes and fails to perform a normal restart.
PLED (Syste m Power LED):
Connec t to the power status indicator on the chassis front panel. e LED i s on when
the system is ope rating. e LED keeps blinking when the system i s in S3 sleep state.
e LED is o when the system i s in S4 sle ep 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 dr ive is reading or w riting data.
e front panel de sign may dier by chassis. A front pane l module mainly consists
of power switch , reset switch, power LED, hard dr ive activity LED, speak er and etc.
When connecting your chassis front panel module to this head er, make sure the wire
assig nments and the pin assig nments are matched correctly.
1
PLE D+
PLE D-
HDL ED-
HDL ED+
PWR BTN #
GND
RES ET#
GND
GND
Connect the power
switch, reset switch 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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B450M-HDV
SPE AKE R
Chassis Intrusion and
Speaker Header
(7-pin SPK_CI1)
(see p.6, No. 14)
Serial ATA3 Connectors
(SATA3_1:
see p.6, No. 10)
(SATA3_2:
see p.6, No. 11)
(SATA3_3:
see p.6, No. 8)
(SATA3_4:
see p.6, No. 9)
USB 2.0 Headers
(9-pin USB_3_4)
(see p.6, No. 6)
(9-pin USB_5_6)
(see p.6, No. 7)
DUM MY
DUM MY
+5V
1
SIG NAL
GND
DUM MY
SATA3_3
SATA3_2 SATA3_1
DUM MY
GNDGND
USB _P WR
+A
+B
-A
-B
1
SATA3_4
USB _P WR
Please connect the
chassis intrusion and the
chassis speaker to this
header.
ese four SATA3
connectors support SATA
data cables for internal
storage devices with up to
6.0 Gb/s data transfer rate.
ere are two headers
on this motherboard.
Each USB 2.0 header can
support two ports.
USB 3.1 Gen1 Header
(19-pin USB3_5_6)
(see p.6, No. 5)
Front Panel Audio Header
(9-pin HD_AUDIO1)
(see p.6, No. 18)
Vbus
IntA _PA_S SRX-
IntA _PA_S SRX+
IntA _PA_S STX-
IntA _PA_S STX+
IntA _PA_D -
IntA _PA_D +
GND
1
MIC 2_L
GND
GND
PRE SEN CE#
MIC _RE T
OUT 2_R
MIC 2_R
VbusVbus
IntA _PB_ SSRX -
IntA _PB_ SSRX +
GND
IntA _PB_ SSTX -
IntA _PB_ SSTX +
GND
IntA _PB_ D-
IntA _PB_ D+
Dumm y
1
OUT _RE T
OUT 2_L
J_S ENS E
ere is one header on
this motherboard. is
USB 3.1 Gen1 header can
support two ports.
is header is for
connecting audio devices
to the front audio panel.
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1. High Denition Au dio supports Jack Sen sing, b ut the panel wire on the chassis mu st
suppor t HDA to function correctly. Please follow the instructions in our manual and
chassis manual to install your syste m.
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 need 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 adju st “Recording Volume”.
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Chassis Fan Connector
(3-pin CHA_FAN2)
(see p.6, No. 15)
Chassis/Water Pump Fan
Connector
(4-pin CHA_FAN1/WP)
(see p.6, No. 20)
CPU Fan Connector
(4-pin CPU_FAN1)
(see p.6, No. 2)
FAN_ SP EED _CO NTR OL
FAN _VO LT AGE
+12 V
CPU _FA N_ SPE ED
GND
FAN _ SP EE D_C ON TRO L
1 2 3 4
GND
+12 V
CHA _FA N_S PEE D
FAN_ SP EED
GND
Please connect fan cables
to the fan connectors and
match the black wire to
the ground pin.
is motherboard
4
3
provides a 4-Pin water
2
1
cooling
chassis
connector. If you plan to
connect a 3-Pin
water cooler fan, please
connect it to Pin 1-3.
is motherboard pro-
vides 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.
fan
chassis
28
B450M-HDV
1
AFD #
ERRO R#
PINI T#
GND
SLIN #
STB #
SPD 0
SPD 1
SPD 3
SPD 2
SPD 4
SPD 5
SPD 6
SPD 7
ACK#
BUS Y
PE
SLCT
ATX Power Connector
(24-pin ATXPWR1)
(see p.6, No. 4)
ATX 12V Power
Connector
(4-pin ATX12V1)
(see p.6, No. 1)
Serial Port Header
(9-pin COM1)
(see p.6, No. 17)
TPM Header
(17-pin TPMS1)
(see p.6, No. 19)
1
12
1
RRX D1
DDC D#1
DDT R#1
DDS R#1
GND
TTX D1
24
13
CCT S#1
RRI #1
RRTS #1
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.
is motherboard
provides a 4-pin ATX 12V
power connector.
is COM1 header
supports a serial port
module.
is connector supports
Trusted Platform Module
(TPM) system, which can
securely store keys, digital
PCI RST#
certicates, passwords,
FRA ME
PCI CLK
and data. A TPM system
also helps enhance
network securit y, protects
digital identities, and
ensures platform integrity.
Print Port Header
(25-pin LPT1)
(see p.6, No. 16)
is is an interface
for print port cable
that allows convenient
connection of printer
devices.
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2.7 M.2_SSD (NGFF) Module Installation Guide
The M.2, also known as the Next Generat ion Form Factor (NGFF), is a small size and
versatile card edge connector that aims to replace mPCIe and mSATA. The Ultra M.2
Socket supports SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3
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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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 Instal l 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 soware that the motherboard supports.
Click on a specic item then follow the installation wizard to insta ll it.
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3.2 A-Tuning
A-Tuning is ASRock’s multi purpose soware suite with a new interface, more new
features and improved utilities.
3.2.1 Installing A-Tuning
A-Tuning can be downloaded from ASRock Live Update & APP Shop. Aer the
installation, you will nd the icon “A-Tuning“ on your desktop. Double-click the “A-
Tuning“ icon, A-Tuning 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.
B450M-HDV
35
English
OC Tweaker
Congurations for overclocking the system.
System Info
View information about the system.
*e System Browser tab may not appear for certain models.
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36
B450M-HDV
FAN-Tastic Tuning
Congure up to ve dierent fan speeds using the graph. e fans will automatically shi
to the next speed level when the assigned temperature is met.
Settings
Congure 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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3.3 ASRock Live Update & APP Shop
e ASRock Live Update & APP Shop is an online store for purchasing and
downloading soware applications for your ASRock computer. You can quick ly and
easily insta ll 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
Category Panel
Hot News
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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.
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.
B450M-HDV
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.
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.
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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.
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To uninstall it, simply click on the trash can icon .
*e trash icon may not appear for certain apps.
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.
B450M-HDV
Step 2
Click on the yellow icon to start upgrading.
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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.
Step 1
Please check the item information before update. Click on to see more details.
Step 2
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Click to select one or more items you want to update.
Step 3
Click Update to start the update process.
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.
B450M-HDV
43
English
Chapter 4 UEFI SETUP UTILITY
4.1 Introduction
is section explains how to use the UEFI SETUP UTILITY to congure your
system. You may run the UEFI SETUP UTILITY by pressing <F2> or <Del> right
aer 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 aer
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 soware is constantly being upd ated, the following UEFI setup
screens and de scriptions are for reference 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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Main
OC Tweaker
Advanced
Tool
H/W Monitor
Security
Boot
Exit
For setting system time/date information
For overclocking congurations
For advanced system congurations
Useful tools
Displays current hardware status
For security settings
For conguring 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-HDV
+ / -
<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
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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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4.3 OC Tweaker Screen
In the OC Tweaker screen, you can set up overclocking features.
B450M-HDV
Becau se the UEFI soware is constantly being upd ated, the following UEFI setup
screens and de scriptions are for reference purpose only, and they may not exactly
match what you see on your scre en.
CPU Conguration
OC Mode Change Switch
Select a setting for OC Mode.
Overclock Mode
Select the overclock mode.
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.
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SMT Mode
is item can be used to disable symmetric multithreading. To re-enable SMT, a
power cycle is needed aer selecting [Auto].
Warning: S3 is not supported on systems where SMT is disabled.
DRAM Timing Conguration
DRAM Frequency
If [Auto] is selected, the motherboard will detect the memory module(s) inserted
and assign the appropriate frequency automatically.
AM4 Advance Boot Training
Set TR4 Advance boot training to [Auto] to increase compatibility.
Voltage Conguration
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].
Save User Default
Type a prole name and press enter to save your settings as user default.
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Load User Default
Load previously saved user defaults.
Save User UEFI Setup Prole to Disk
It helps you to save current UEFI settings as an user prole to disk.
Load User UEFI Setup Prole from Disk
You can load previous saved prole from the disk.
4.4 Advanced Screen
In this section, you may set the congurations for the following items: CPU
Conguration, North Bridge Conguration, South Bridge Conguration, Storage-
Conguration, Super IO Conguration, ACPI Conguration, Trusted Computing ,
AMD CBS and AMD PBS.
B450M-HDV
Setting wrong values in this sec tion may cause the system to malfunction.
UEFI Conguration
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 Conguration
Cool 'n' Quiet
Use this item to enable or disable AMD’s Cool ‘n’ QuietTM technology. e default value is
[Enabled]. Conguration 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.
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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]. Conguration options: [Enabled] and [Disabled].
4.4.2 North Bridge Conguration
SR-IOV Support
Enable/disable the SR-IOV (Single Root IO Virtualization Support) if the system
has SR-IOV capable PCIe devices.
B450M-HDV
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4.4.3 South Bridge Conguration
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.
Front Panel
Enable/disable front panel HD audio.
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Deep Sleep
Congure deep sleep mode for power saving when the computer is shut down.
Restore on AC/Power Loss
Select the power state aer 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.
4.4.4 Storage Conguration
SATA Controller(s)
Enable/disable the SATA controllers.
B450M-HDV
SATA Mode
AHCI: Supports new features that improve performance.
RAID: Combine multiple disk drives into a logical unit.
SATA Hot Plug
Enable/disable the SATA Hot Plug function.
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4.4.5 Super IO Conguration
Serial Port
Enable or disable the Serial port.
Serial Port Address
Select the address of the Serial port.
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Parallel Port
Enable or disable the Parallel port.
Change Settings
Select the address of the Parallel port.
Device Mode
Select the device mode according to your connected device.
PS2 Y-Cable
Enable the PS2 Y-Cable or set this option to Auto.
4.4.6 ACPI Conguration
Suspend to RAM
It is recommended to select auto for ACPI S3 power saving.
B450M-HDV
ACPI HPET Table
Enable the High Precision Event Timer for better performance and to pass WHQL
tests.
PS/2 Keyboard S4/S5 Wakeup Support
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 rea l time clock alarm. Set it to By OS to let
it be handled by your operating system.
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4.4.7 Trusted Computing
Security Device Support
Enable or disable BIOS support for security device.
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4.4.8 AMD CBS
Zen Common Options
RedirectForReturnDis
B450M-HDV
From a workaround for GCC/C000005 issue for XV Core on CZ A0, setting MSRC001_1029
Decode Conguration (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 eect.
SMTEN
is item can be used to disable symmetric multithreading. To re-enable SMT, a POWER
CYCLE is needed aer 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.