Asus PRIME B450M-A/CSM Manuale utente
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Motherboard
PRIME B450M-A
ii
E14212
First Edition
May 2018
Copyright © 2018 ASUSTeK COMPUTER INC. All Rights Reserved.
No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK COMPUTER INC. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY
DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or
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owners’ benet, without intent to infringe.
Offer to Provide Source Code of Certain Software
This product contains copyrighted software that is licensed under the General Public License (“GPL”),
under the Lesser General Public License Version (“LGPL”) and/or other Free Open Source Software
Licenses. Such software in this product is distributed without any warranty to the extent permitted by the
applicable law. Copies of these licenses are included in this product.
Where the applicable license entitles you to the source code of such software and/or other additional data,
you may obtain it for a period of three years after our last shipment of the product, either
(1) for free by downloading it from http://support.asus.com/download
or
(2) for the cost of reproduction and shipment, which is dependent on the preferred carrier and the location
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Legal Compliance Dept.
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Taiwan
In your request please provide the name, model number and version, as stated in the About Box of the
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The source code will be distributed WITHOUT ANY WARRANTY and licensed under the same license as
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This offer is valid to anyone in receipt of this information.
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iii
Contents
Safety information ...................................................................................... iv
About this guide ......................................................................................... iv
Package contents ....................................................................................... vi
PRIME B450M-A specications summary ................................................ vi
Chapter 1: Product introduction
Before you proceed .................................................................................. 1-1
Motherboard overview ............................................................................. 1-1
Central Processing Unit (CPU) ................................................................ 1-7
System memory ........................................................................................ 1-9
Chapter 2: BIOS information
BIOS setup program ................................................................................. 2-1
EZ Mode ..................................................................................................... 2-2
Advanced Mode ........................................................................................ 2-3
Exit menu ................................................................................................... 2-4
Appendix
Notices .......................................................................................................A-1
ASUS contact information .......................................................................A-4
iv
Safety information
Electrical safety
• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
• Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
• If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.
Operation safety
• Before installing the motherboard and adding components, carefully read all the manuals
that came with the package.
• Before using the product, ensure all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
• To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
• Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may be exposed to moisture.
• Place the product on a stable surface.
• If you encounter technical problems with the product, contact a qualied service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and conguring the
motherboard.
How this guide is organized
This guide contains the following parts:
• Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports. It includes descriptions of the switches, jumpers, and connectors on the
motherboard.
• Chapter 2: BIOS information
This chapter discusses changing system settings through the BIOS Setup menus.
v
Where to nd more information
Refer to the following sources for additional information and for product and software
updates.
1. ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
2. Optional documentation
Your product package may include optional documentation, such as warranty yers,
that may have been added by your dealer. These documents are not part of the
standard package.
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when
completing a task.
CAUTION: Information to prevent damage to the components when
completing a task
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text Indicates a menu or an item to select.
Italics
Used to emphasize a word or a phrase.
<Key> Keys enclosed in the less-than and greater-than sign
means that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1> + <Key2> + <Key3> If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
vi
PRIME B450M-A specications summary
(continued on the next page)
Package contents
Check your motherboard package for the following items.
Motherboard
ASUS PRIME B450M-A motherboard
Cables
2 x Serial ATA 6.0 Gb/s cables
Accessories
1 x I/O shield
1 x M.2 screw package
Application DVD
1 x Support DVD
Documentation
1 x User Manual
If any of the above items is damaged or missing, contact your retailer.
CPU
AM4 socket for AMD Ryzen™ 2
nd
Generation/ Ryzen™ with Radeon™ Vega
Graphics/ Ryzen™ 1
st
Generation Processors
Support CPU up to 8 cores*
* Due to CPU limitation, CPU cores supported varies by processor.
** Refer to www.asus.com for the AMD CPU support list.
Chipset AMD B450 chipset
Memory
AMD Ryzen™ 2
nd
Generation/ Ryzen™ with Radeon™ Vega Graphics/ Ryzen™
1
st
Generation Processors
- 4 x DIMMs, max. 64GB, DDR4 3200(O.C.)/ 3000(O.C)/ 2800(O.C.)/ 2666/ 2400/
2133 MHz, un-buffered memory
Dual-channel memory architecture
* ECC memory (ECC mode) support varies by CPU.
** Refer to www.asus.com for the latest Memory QVL (Qualied Vendors List).
Expansion
slots
AMD Ryzen™ 2
nd
Generation/ Ryzen™ 1
st
Generation Processors
- 1 x PCI Express 3.0/2.0 x16 slot (max. @x16 mode)
AMD Ryzen™ with Radeon™ Vega Graphics Processors
- 1 x PCI Express 3.0/2.0 x16 slot (max. @x8 mode)
AMD B450 Chipset:
- 2 x PCI Express 2.0 x1 slots
Graphics
Integrated Graphics in the AMD Ryzen™ with Radeon™ Vega Graphics
Processors
Multi-VGA output support: HDMI, DVI-D, and D-Sub ports
- Supports HDMI 2.0b with maximum resolution of 4096 x 2160 @60Hz
- Supports DVI-D with maximum resolution of 1920 x 1200 @60Hz
- Supports D-Sub with maximum resolution of 1920 x 1200 @60Hz
LAN Realtek
®
8111H Gigabit LAN controller
vii
PRIME B450M-A specications summary
(continued on the next page)
Storage
AMD B450 Chipset
- 4 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support
AMD Ryzen™ 2
nd
Generation/ Ryzen™ with Radeon™ Vega Graphics/ Ryzen™ 1
st
Generation Processors
- 2 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support
AMD Ryzen™ 2
nd
Generation/ Ryzen™ with Radeon™ Vega Graphics/ Ryzen™ 1
st
Generation Processors
- 1 x M.2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIe 3.0 x4 and SATA
modes) storage devices support*
* The M.2 Socket shares bandwidth with the SATA_5/6 ports, and therefore the SATA_5/6 ports
cannot be used when an M.2 device is installed.
Audio
Realtek
®
ALC 887-VD2 8-Channel High Denition Audio CODEC
- LED-illuminated design: Brighten up your build with the gorgeous illuminated audio
trace path.
- Audio Shielding: Ensures precision analog/digital separation and greatly reduces
multi-lateral interference
- Dedicated audio PCB layers: Separate layers for left and right channels to guard
the quality of the sensitive audio signals
- Premium Japanese audio capacitors: Provide warm, natural and immersive sound
with exceptional clarity and delity
- Supports jack-detection and front panel jack-retasking
* Use a chassis with HD audio module in the front panel to support an 8-channel audio output.
USB
AMD Ryzen™ 2
nd
Generation/ Ryzen™ with Radeon™ Vega Graphics/ Ryzen™ 1
st
Generation Processors
- 4 x USB 3.1 Gen 1 (up to 5Gbps) ports (4 ports at the rear panel)
AMD B450 Chipset:
- 2 x USB 3.1 Gen 2 (up to 10Gbps) ports (2 ports at the rear panel)
- 2 x USB 3.1 Gen 1 (up to 5Gbps) ports (2 ports at mid-board)
- 4 x USB 2.0 / 1.1 ports (4 ports at mid-board)
ASUS unique
features
ASUS 5X PROTECTION III
- ASUS SafeSlot Core: Fortied PCIe Slot prevents damage
- ASUS ESD Guard: Enhanced ESD protection
- ASUS Overvoltage Protection: World-class circuit-protecting power design
- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
- ASUS DIGI+ VRM: 6 Phase digital power design
Superb performance
UEFI BIOS
- Most advanced options with fast response time
Easy PC DIY
Safe motherboard mounting
- Component-free areas to minimize damage risk
Q-Design
- ASUS Q-DIMM
- ASUS Q-Slot
UEFI BIOS EZ Mode
- featuring friendly graphics user interface
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
viii
PRIME B450M-A specications summary
ASUS Quiet
Thermal
Solution
Quiet Thermal Design:
- Stylish Fanless Design: Chipset Heat-sink solution
- ASUS Fan Xpert 2+
Rear panel I/O
ports
1 x PS/2 keyboard (purple)
1 x PS/2 mouse port (green)
1 x HDMI port
1 x DVI-D port
1 x D-Sub port
1 x LAN (RJ-45) port
2 x USB 3.1 Gen 2 ports
4 x USB 3.1 Gen 1 ports
3 x Audio jacks support 8-channel audio output
Internal
connectors
1 x USB 3.1 Gen 1 connector supports additional 2 USB 3.1 Gen 1 ports
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports
1 x M.2 socket 3 for M Key and type 2242/2260/2280/22110 devices (both SATA
& PCIe modes)
6 x SATA 6.0Gb/s connectors
1 x COM connector
1 x TPM connector
1 x CPU Fan connector
1 x Aura RGB Strip header
2 x Chassis Fan connectors (Support DC & PWM mode)
1 x Front panel audio connector
1 x 24-pin EATX power connector
1 x 8-pin EATX 12V power connector
1 x 2-pin Clear CMOS header
1 x S/PDIF out connector
1 x Speaker connector
1 x System panel connector
BIOS features
128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-
language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, F3 My Favorites,
Last Modied log, F12 PrintScreen, ASUS User Prole, ASUS DRAM SPD
(Serial Presence Detect) memory information, F6 Qfan Control, F4 AURA ON/
OFF, F9 Search
Manageability WOL by PME, PXE
Support DVD
Drivers
ASUS utilities
Anti-virus software (OEM version)
OS support Windows
®
10 (64-bit)
Form factor
uATX form factor: 9.6 in. x 9.5 in. (24.4 cm x 24.0 cm)
Specications are subject to change without notice.
ASUS PRIME B450M-A
1-1
Product introduction
1
Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplugthepowercordfromthewallsocketbeforetouchinganycomponent.
• Beforehandlingcomponents,useagroundedwriststraportouchasafelygrounded
objectorametalobject,suchasthepowersupplycase,toavoiddamagingthemdue
to static electricity.
• Beforeyouinstallorremoveanycomponent,ensurethattheATXpowersupplyis
switched off or the power cord is detached from the power supply. Failure to do so
maycauseseveredamagetothemotherboard,peripherals,orcomponents.
PCIEX16
PCIEX1_1
PCIEX1_2
SPEAKER
CLRTC
F_PANEL
SPDIF_OUT
USB56USB34
U31G1_12
AAFP
COM
EATX12V
EATXPWR
CPU_FAN
CHA_FAN2
CHA_FAN1
BATTERY
Super
I/O
ALC
887
DIGI
+VRM
24.4cm(9.6in)
AMD
®
B450
DDR4 DIMM_A1 (64bit, 288-pin module)
SOCKET AM4
228022110 2260 2242
M.2_1(SOCKET3)
DDR4 DIMM_A2* (64bit,288-pin module)
DDR4 DIMM_B1 (64bit, 288-pin module)
DDR4 DIMM_B2* (64bit, 288-pin module)
AUDIO
KBMS
HDMI
LAN_U31G1_34
U31G2_12
U31G1_56
24.0cm(9.5in)
128Mb
BIOS
SATA6G_5 SATA6G_4SATA6G_1 SATA6G_2
SATA6G_5 SATA6G_6
DVI
VGA
LANGuard
Realtek
®
8111H
TPM
431 652 2
1
7910
7
8
1
14 131516
17
12 11
18
RGB_HEADER
Motherboard overview
Place this
side towards
the rear of the
chassis
ScantheQRcodetogetthedetailedpindenitions.
1-2
Chapter 1: Product introduction
ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)
TheseconnectorsareforATXpowersupplyplugs.Thepowersupplyplugsare
designedtottheseconnectorsinonlyoneorientation.Findtheproperorientation
andpushdownrmlyuntiltheconnectorscompletelyt.
•
WerecommendthatyouuseanATX12VSpecication2.0‑compliantpower
supplyunit(PSU)withaminimumof350Wpowerrating.ThisPSUtypehas24‑pin
and 8-pin power plugs.
•
DONOTforgettoconnectthe8‑pinEATX+12Vpowerplug.Otherwise,the
system will not boot up.
• WerecommendthatyouuseaPSUwithhigherpoweroutputwhenconguringa
systemwithmorepower‑consumingdevicesorwhenyouintendtoinstalladditional
devices.Thesystemmaybecomeunstableormaynotbootupifthepoweris
inadequate.
•
Ifyouareuncertainabouttheminimumpowersupplyrequirementforyoursystem,
refer to the Recommended Power Supply Wattage Calculator at http://support.
asus.com.cn/PowerSupply.aspx?SLanguage=en for details.
CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN1/2)
Connectthefancablestothefanconnectorsonthemotherboard,ensuringthatthe
black wire of each cable matches the ground pin of the connector.
Donotforgettoconnectthefancablestothefanconnectors.Insufcientairowinside
the system may damage the motherboard components. These are not jumpers! Do not
placejumpercapsonthefanconnectors!TheCPU_FANconnectorsupportsaCPUfan
ofmaximum1A(12W)fanpower.
M.2 socket 3
This socket allows you to install M.2(NGFF)SSDmodules.
M.2(SOCKET3)
228022110 2260 2242
• TheM.2socketsupportsPCIe3.0x4modeandSATAmodeMKeydesignand
type2242/2260/2280/22110storagedevices.
• TheM.2SocketsharesbandwidthwiththeSATA_5/6ports,andthereforethe
SATA_5/6portscannotbeusedwhenanM.2deviceisinstalled.
AMD AM4 CPU socket
ThemotherboardcomeswithanAMDAM4socketdesignedforAMDRyzen™
2
nd
Generation/Ryzen™withRadeon™VegaGraphics/Ryzen™1
st
Generation
processors.
Formoredetails,refertoCentral Processing Unit (CPU).
ASUS PRIME B450M-A
1‑3
TheRGBheadersupports5050RGB
multi‑colorLEDstrips(12V/G/R/B),witha
maximumpowerratingof3A(12V),and
nolongerthan3m.
Beforeyouinstallorremoveany
component,ensurethattheATXpower
supply is switched off or the power cord is
detached from the power supply. Failure
todosomaycauseseveredamagetothemotherboard,peripherals,orcomponents.
• ActuallightingandcolorwillvarywithLEDstrip.
• IfyourLEDstripdoesnotlightup,checkiftheRGBLEDextensioncableandthe
RGBLEDstripisconnectedinthecorrectorientation,andthe12Vconnectoris
alignedwiththe12Vheaderonthemotherboard.
• TheLEDstripwillonlylightupwhenthesystemisoperating.
• TheLEDstripsarepurchasedseparately.
12V
GRB
RGB_HEADER
PIN 1
+12V G R B
Aura RGB Strip header (4-pin RGB_HEADER)
ThisheaderisforRGBLEDstrips.
DDR4 DIMM slots
Install2GB,4GB,8GB,and16GBunbufferedDDR4DIMMsintotheseDIMM
sockets.
Formoredetails,refertoSystem memory.
AMD
®
Serial ATA 6.0Gb/s connectors (7-pin SATA6G_1~6)
TheseconnectorsconnecttoSerialATA6.0Gb/sharddiskdrivesviaSerialATA
6.0Gb/ssignalcables.
Clear RTC RAM (2-pin CLRTC)
ThisheaderallowsyoutocleartheCMOSRTCRAMdataof
thesystemsetupinformationsuchasdate,time,andsystem
passwords.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Useametalobjectsuchasascrewdrivertoshortthetwo
pins.
3. PlugthepowercordandturnONthecomputer.
4. Holddownthe<Del> key during the boot process and enter
BIOSsetuptore‑enterdata.
CLRTC
+3V_BAT
GND
PIN 1
Ifthestepsabovedonothelp,removetheonboardbatteryandshortthetwopinsagain
tocleartheCMOSRTCRAMdata.AfterclearingtheCMOS,reinstallthebattery.
1‑4
Chapter 1: Product introduction
System panel connector (10-1 pin F_PANEL)
Thisconnectorsupportsseveralchassis‑mountedfunctions.
Speaker connector (4-pin SPEAKER)
This4‑pinconnectorisforthechassis‑mountedsystemwarningspeaker.The
speaker allows you to hear system beeps and warnings.
USB 3.1 Gen 1 (up to 5Gbps) connector (20-1 pin U31G1_12)
ConnectaUSB3.1Gen1moduletothisconnectorforadditionalUSB3.1
Gen1frontorrearpanelports.ThisconnectorcomplieswithUSB3.1Gen1
specicationsandprovidefasterdatatransferspeedsofupto5Gbps,faster
chargingtimeforUSB‑chargeabledevices,optimizedpowerefciency,and
backwardcompatibilitywithUSB2.0.
USB 2.0 connectors (10-1 pin USB34, USB56)
TheseconnectorsareforUSB2.0ports.ConnecttheUSBmodulecabletoanyof
theseconnector,theninstallthemoduletoaslotopeningatthebackofthesystem
chassis.TheseUSBconnectorscomplywithUSB2.0specicationsandsupports
upto480Mbpsconnectionspeed.
TPM connector (14-1 pin TPM)
This connector supports a Trusted Platform Module
(TPM)system,whichcansecurelystorekeys,digital
certicates,passwords,anddata.ATPMsystem
alsohelpsenhancenetworksecurity,protectsdigital
identities,andensuresplatformintegrity.
TPM
PIN 1
+3VSB
S_PCIRST#_TBD
GND
C_PCICLK_TPM
+3V
+3V
TPM_PD#
F_SERIRQ
F_FRAME#
F_LAD3
F_LAD2
F_LAD1
F_LAD0
Serial port connector (10-1 pin COM)
Thisconnectorisforaserial(COM)port.Connectthe
serialportmodulecabletothisconnector,theninstall
the module to a slot opening at the back of the system
chassis.
PIN 1
COM
DCD
TXD
GND
RTS
RI
RXD
DTR
DSR
CTS
Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that
supportsHDaudiostandard.ConnectoneendofthefrontpanelaudioI/O
module cable to this connector.
• Werecommendthatyouconnectahigh‑denitionfrontpanelaudiomoduleto
thisconnectortoavailofthemotherboard’shigh‑denitionaudiocapability.
• Ifyouwanttoconnectahigh‑denitionfrontpanelaudiomoduletothis
connector,settheFrontPanelTypeitemintheBIOSsetupto[HDAudio].By
default,thisconnectorissetto[HDAudio].
ASUS PRIME B450M-A
1‑5
PCI Express 2.0 x1 slots
ThismotherboardhastwoPCIExpress2.0x1slotsthatsupportPCIExpress2.0
x1networkcards,SCSIcards,andothercardsthatcomplywiththePCIExpress
specications.
PCI Express 3.0/2.0 x16 slot
ThismotherboardhasaPCIExpress3.0/2.0x16slotthatsupportsPCIExpress
3.0/2.0x16graphiccardscomplyingwiththePCIExpressspecications.
Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital
Interface(S/PDIF)port.ConnecttheS/PDIFOutmodule
cabletothisconnector,theninstallthemoduletoaslot
opening at the back of the system chassis.
SPDIF_OUT
+5V
SPDIFOUT
GND
Rear panel connectors
1. PS/2 Mouse port (green). This port connects to a PS/2 mouse.
2. Video Graphics Adapter (VGA) port.This15‑pinportisforaVGAmonitororother
VGA‑compatibledevices.
3. USB 3.1 Gen 1 (up to 5Gbps) ports.These9‑pinUniversalSerialBus(USB)ports
connecttoUSB3.1Gen1devices.
4. USB 3.1 Gen 2 (up to 10Gbps) ports (teal blue, Type A).These9‑pinUniversal
SerialBus3.1(USB3.1)portsareforUSB3.1Gen2devices.
• USB3.1Gen2/Gen1devicescanonlybeusedfordatastorage.
• DuetothedesignoftheAMDAM4serieschipset,allUSBdevicesconnectedtothe
USB2.0andUSB3.1Gen2/Gen1portsarecontrolledbythexHCIcontroller.
• WestronglyrecommendthatyouconnectUSB3.1Gen2devicestoUSB3.1Gen2
portsforfasterandbetterperformancefromyourUSB3.1Gen2devices.
1 4 5
311
3
6 7
8
9
2
10
1‑6
Chapter 1: Product introduction
5. LAN (RJ-45) port.ThisportallowsGigabitconnectiontoaLocalAreaNetwork(LAN)
throughanetworkhub.RefertothetablebelowfortheLANportLEDindications.
LAN port
Speed
LED
Activity Link
LED
Activity/Link LED Speed LED
Status Description Status Description
Off No link OFF 10Mbpsconnection
Orange Linked ORANGE 100Mbpsconnection
Orange(Blinking) Dataactivity GREEN 1Gbps connection
Orange(Blinking
thensteady)
Ready to wake
upfromS5mode
LAN port LED indications
6. Line In port (light blue).Thisportconnectstothetape,CD,DVDplayer,orother
audio sources.
7. Line Out port (lime).Thisportconnectstoaheadphoneoraspeaker.Inthe4.1,5.1
and7.1‑channelcongurations,thefunctionofthisportbecomesFrontSpeakerOut.
9. HDMI port. ThisportisforaHigh‑DenitionMultimediaInterface(HDMI)connector,
andisHDCPcompliantallowingplaybackofHDDVD,Blu‑Ray,andotherprotected
content.
10. DVI-D port.ThisportisforanyDVI‑Dcompatibledevice.
DVI‑DcannotbeconvertedtooutputfromRGBSignaltoCRTandisnotcompatiblewith
DVI‑I.
11. PS/2 Keyboard port (purple). This port connects to a PS/2 keyboard.
Audio 2.1, 4.1, 5.1, or 7.1-channel conguration
Port
Headset
2.1-channel
4.1-channel 5.1-channel 7.1-channel
LightBlue(Rearpanel) Line In Rear Speaker Out Rear Speaker Out Rear Speaker Out
Lime(Rearpanel) Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink(Rearpanel) Mic In Mic In Bass/Center Bass/Center
Lime(Frontpanel) - - - Side Speaker Out
8. Microphone port (pink). This port connects to a microphone.
Refertotheaudiocongurationtableforthefunctionoftheaudioportsin2.1,4.1,5.1,or
7.1‑channelconguration.
ASUS PRIME B450M-A
1-7
Central Processing Unit (CPU)
ThemotherboardcomeswithanAMDAM4socketdesignedfor
AMDRyzen™2
nd
Generation/Ryzen™withRadeon™Vega
Graphics/Ryzen™1
st
Generation processors.
UnplugallpowercablesbeforeinstallingtheCPU.
TheAM4sockethasadifferentpinoutfromtheFM2+/FM2socket.Ensurethatyouusea
CPUdesignedfortheAM4socket.TheCPUtsinonlyonecorrectorientation.DONOT
forcetheCPUintothesockettopreventbendingthepinsanddamagingtheCPU!
Installing the CPU
ApplytheThermalInterfaceMaterialtotheCPUheatsinkandCPUbeforeyouinstallthe
heatsink and fan if necessary.
1
3
2
4
1-8
Chapter 1: Product introduction
Installing the CPU heatsink and fan assembly
Type 2
Type 1
1
1
3
2
2
4
Removethescrewsandtheretentionmoduleonly.Donotremovetheplateonthe
bottom.
ASUS PRIME B450M-A
1-9
System memory
Overview
ThismotherboardcomeswithfourDoubleDataRate4(DDR4)DualInlineMemoryModule
(DIMM)sockets.ThegureillustratesthelocationoftheDDR4DIMMsockets:
Channel
Sockets
ChannelA DIMM_A1&DIMM_A2*
ChannelB DIMM_B1&DIMM_B2*
• YoumayinstallvaryingmemorysizesinChannelAandChannelB.Thesystem
mapsthetotalsizeofthelower‑sizedchannelforthedual‑channelconguration.Any
excessmemoryfromthehigher‑sizedchannelisthenmappedforsingle‑channel
operation.
• AlwaysinstallDIMMswiththesameCASlatency.Foroptimalcompatibility,we
recommendthatyouinstallmemorymodulesofthesameversionordatecode(D/C)
fromthesamevendor.Checkwiththeretailertogetthecorrectmemorymodules.
• Forsystemstability,useamoreefcientmemorycoolingsystemtosupportafull
memoryload(4DIMMs).
• Refertowww.asus.comforthelatestMemoryQVL(QualiedVendorsList)
DIMM_A1
DIMM_A2*
DIMM_B1
DIMM_B2*
Recommended memory congurations
DIMM_A2*
DIMM_A2*
DIMM_B2*
DIMM_A2*
DIMM_A1
DIMM_B2*
DIMM_B1
1‑10
Chapter 1: Product introduction
Installing a DIMM
1
2
To remove a DIMM
B
A
B
A
A
BIOS information
2
• ScantheQRcodetoviewtheBIOSupdateguide.
• BeforeusingtheASUSCrashFreeBIOS3utility,renamethe
BIOSleintheremovabledeviceintoPB450MA.CAP.
BIOS setup program
UsetheBIOSSetupprogramtoupdatetheBIOSorcongureitsparameters.TheBIOS
screensincludenavigationkeysandbriefonlinehelptoguideyouinusingtheBIOSSetup
program.
Entering BIOS Setup at startup
To enter BIOS Setup at startup:
Press<Delete>or<F2>duringthePower-OnSelfTest(POST).Ifyoudonotpress<Delete>
or<F2>,POSTcontinueswithitsroutines.
Entering BIOS Setup after POST
To enter BIOS Setup after POST:
Press<Ctrl>+<Alt>+<Del>simultaneously.
Presstheresetbuttononthesystemchassis.
Pressthepowerbuttontoturnthesystemoffthenbackon.Dothisoptiononlyifyoufailedto
enterBIOSSetupusingthersttwooptions.
Usingthepowerbutton,resetbutton,orthe<Ctrl>+<Alt>+<Del>keystoforceresetfroma
runningoperatingsystemcancausedamagetoyourdataorsystem.Werecommendyou
alwaysshutdownthesystemproperlyfromtheoperatingsystem.
• TheBIOSsetupscreensshowninthissectionareforreferencepurposesonly,and
maynotexactlymatchwhatyouseeonyourscreen.
• VisittheASUSwebsiteatwww.asus.comtodownloadthelatestBIOSleforthis
motherboard.
• IfthesystembecomesunstableafterchanginganyBIOSsetting,loadthedefault
settingstoensuresystemcompatibilityandstability.SelecttheLoad Optimized
DefaultsitemundertheExitmenuorpresshotkeyF5.
• IfthesystemfailstobootafterchanginganyBIOSsetting,trytocleartheCMOSand
resetthemotherboardtothedefaultvalue.SeesectionMotherboard overviewfor
informationonhowtoerasetheRTCRAM.
BIOS menu screen
TheBIOSsetupprogramcanbeusedundertwomodes:EZ ModeandAdvanced Mode.
Press<F7>tochangebetweenthetwomodes.
ASUS PRIME B450M-A 2-1
EZ Mode
Bydefault,theEZModescreenappearswhenyouentertheBIOSsetupprogram.TheEZ
Modeprovidesyouanoverviewofthebasicsysteminformation,andallowsyoutoselectthe
displaylanguage,systemperformancemode,fanproleandbootdevicepriority.Toaccess
theAdvancedMode,clickAdvanced Mode(F7)orpress<F7>.
ThedefaultscreenforenteringtheBIOSsetupprogramcanbechanged.Refertothe
Setup Modeitemunderthe Boot menufordetails.
Thebootdeviceoptionsvarydependingonthedevicesyouinstalledtothesystem.
Saves the changes and
resets the system
Selects the display language
of the BIOS setup program
Displays the CPU/motherboard temperature,
CPU voltage output, CPU/chassis fan speed,
and SATA information
Displays the system properties of
the selected mode. Click <Enter> to
switch EZ System Tuning modes
Displays the
Advanced mode
menus
Selects the boot
device priority
Loads optimized
default settings
Shows the
bootable
devices
Displays the CPU Fan’s speed. Click
the button to manually tune the fans
Search on FAQs
Searches by BIOS item name,
enter the item name to nd
the related item listing
Turns the RGB LED
lighting on or off
2-2 Chapter 2: Getting started
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Asus PRIME B450M-A/CSM Manuale utente
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