Asus PRIME X370-A User manual

Motherboard

PRIME X370-A

ii

E12715

First Edition

April 2017

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iii

Contents

Safety information ...................................................................................... iv

About this guide ......................................................................................... iv

Package contents ....................................................................................... vi

PRIME X370-A specications summary ................................................... vi

Chapter 1: Product introduction

1.1 Before you proceed ..................................................................... 1-1

1.2 Motherboard overview ................................................................. 1-1

1.3 Central Processing Unit (CPU) ................................................. 1-10

1.4 System memory ......................................................................... 1-12

1.5 Software support ........................................................................ 1-13

Chapter 2: BIOS information

2.1 Managing and updating your BIOS ............................................ 2-1

2.2 BIOS setup program .................................................................... 2-5

2.3 My Favorites ............................................................................... 2-12

2.4 Main menu .................................................................................. 2-13

2.5 Ai Tweaker menu ........................................................................ 2-15

2.6 Advanced menu ......................................................................... 2-20

2.7 Monitor menu ............................................................................. 2-25

2.8 Boot menu .................................................................................. 2-28

2.9 Tool menu ................................................................................... 2-33

2.10 Exit menu .................................................................................... 2-34

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 qualied 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 qualied service

technician or your retailer.

About this guide

This user guide contains the information you need when installing and conguring 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 X370-A specications summary

(continued on the next page)

Package contents

Check your motherboard package for the following items.

Motherboard ASUS PRIME X370-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™ / 7th Generation A-series / Athlon™ processors

Supports CPU up to 8 cores*

* Due to CPU limitation, CPU cores supported vary by processor.

** Refer to www.asus.com for AMD CPU support list.

Chipset AMD X370 Chipset

Memory

AMD Ryzen™ Processors:

4 x DIMMs, max. 64GB, DDR4 3200(O.C.) / 2933(O.C.) / 2666 / 2400 / 2133 MHz,

ECC and non-ECC, un-buffered memory

AMD 7th Generation A-series / Athlon™ Processors:

4 x DIMMs, max. 64GB, DDR4 2400 / 2133 MHz, non-ECC, un-buffered memory

Dual-channel memory architecture

* Hyper DIMM support is subject to the physical characteristics of individual CPUs.

** Refer to www.asus.com for the latest Memory QVL (Qualied Vendors List).

Graphics

Integrated AMD Radeon™ R Series Graphics in the 7th Generation A-series APU

Multi-VGA output support: HDMI, DVI-D and D-Sub ports

- Supports HDMI 1.4b with maximum resolution of 4096 x 2160 @24Hz / 2560 x

1600 @60Hz

- Supports DVI-D with maximum resolution of 1920 x 1200 @60Hz

- Supports D-Sub with maximum resolution of 1920 x 1200 @60Hz

- Maximum shared memory of 2048 MB

Multi-GPU

support Supports AMD CrossFireX™ Technology

Expansion

slots

AMD Ryzen™ Processors:

1 x PCI Express 3.0/2.0 x16 slot (max. @x16 mode)

AMD 7th Generation A-series / Athlon™ Processors:

1 x PCI Express 3.0/2.0 x16 slot (max. @x8 mode)

AMD X370 Chipset:

1 x PCI Express 2.0 x16 slot (max. @ x4 mode)

2 x PCI Express 2.0 x1 slots

2 x PCI slots

vii

PRIME X370-A specications summary

(continued on the next page)

Storage

AMD X370 Chipset:

- 6 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support

AMD Ryzen™ 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

AMD 7th Generation A-series / Athlon™ Processors:

- 1 x M.2 socket 3 with M Key, Type 2242 / 2260 / 2280 / 22110 (PCIE 3.0 x2

and SATA modes) storage devices support

LAN Realtek® 8111H Gigabit LAN Controller

Audio

Realtek® ALC 887-VD2 8-Channel High Denition Audio CODEC

* Use a chassis with HD audio module in the front panel to support an 8-channel audio

output.

USB

AMD Ryzen™ / 7th Generation A-series / Athlon™ Processors

- 4 x USB 3.1 Gen 1 ports (4 ports at the rear panel)

AMD X370 Chipset:

- 2 x USB 3.1 Gen 2 ports (2 ports at the rear panel, teal blue, Type A)

- 2 x USB 3.1 Gen 1 ports (2 ports at mid-board)

- 6 x USB 2.0 / 1.1 ports (2 ports at the rear panel; 4 ports at mid-board)

ASUS unique

features

Dependable Stability

ASUS 5X PROTECTION III

- ASUS SafeSlot Core: Fortied PCIe Slot prevents damage

- ASUS LANGuard: Protects against LAN surges, lightning strikes and static-

electricity discharges!

- 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

ASUS Quiet

Thermal

Solution

Quiet Thermal Design:

- Stylish Fanless Design: MOS Heat-sink & Chipset Heat-sink solution

- ASUS Fan Xpert 2+

viii

PRIME X370-A specications summary

Rear panel I/O

ports

1 x PS/2 keyboard/mouse combo port

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 (teal blue, Type A)

4 x USB 3.1 Gen 1 ports

2 x USB 2.0/1.1 ports

3 x Audio jacks support 8-channel audio output

Internal

connectors

1 x USB 3.1 Gen 1 connector support 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 mode)

6 x SATA 6.0Gb/s connectors

1 x COM connector

1 x CPU Fan connector

1 x Fan RGB 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 System panel connector

BIOS features

128 Mb Flash ROM, UEFI AMI BIOS, PnP, WfM2.0, SM BIOS 3.0, ACPI 6.1,

Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, My

Favorites, Last Modied log, F12 PrintScreen, ASUS DRAM SPD (Serial

Presence Detect) memory information, F6 Qfan Control

Manageability WfM 2.0, DMI 3.0, WOL by PME, PXE

Support DVD

Drivers

ASUS utilities

ASUS Update

Anti-virus software (OEM version)

OS support Windows® 10 (64-bit)

Form factor ATX form factor: 12 in. x 9.35 in. (30.5 cm x 23.7 cm)

Specications are subject to change without notice.

ASUS PRIME X370-A 1-1

Product introduction

1

1.1 Before you proceed

Take note of the following precautions before you install motherboard components or change

any motherboard settings.

• Unplugthepowercordfromthewallsocketbeforetouchinganycomponent.

• Beforehandlingcomponents,useagroundedwriststraportouchasafelygrounded

objectorametalobject,suchasthepowersupplycase,toavoiddamagingthemdue

to static electricity.

• Beforeyouinstallorremoveanycomponent,ensurethattheATXpowersupplyis

switched off or the power cord is detached from the power supply. Failure to do so

maycauseseveredamagetothemotherboard,peripherals,orcomponents.

Unplugthepowercordbeforeinstallingorremovingthemotherboard.Failuretodoso

can cause you physical injury and damage motherboard components.

PRIME X370-A

SATA6G_5SATA6G_6

PCIEX16_1

PCI1

PCI2

PCIEX16_2

ALC

887

PCIEX1_1

PCIEX1_2

M.2(SOCKET3)

USB34USB56

AAFP CLRTC

EATXPWR

BATTERY

Super

I/O

228022110

Realtek®

8111H

2260 2242

23.7cm(9.35in)

DDR4 DIMM_A1 (64bit, 288-pin module)

SOCKET AM4

DDR4 DIMM_A2 (64bit, 288-pin module)

DDR4 DIMM_B1 (64bit, 288-pin module)

DDR4 DIMM_B2 (64bit, 288-pin module)

CHA_FAN1

CPU_FAN

CHA_FAN2

30.5cm(12in)

DIGI

+VRM

EPU

ASM

1083

ASM

1480

COM

EATX12V

USB3_12

AMD®

X370

128Mb

BIOS

PANEL

AUDIO

KBMS_USB12

HDMI

LAN_USB3_56

USB3.1

_12

USB3_34

DVI

VGA

SATA6G_4 SATA6G_3

SATA6G_2 SATA6G_1

PCIE SATA

M.2(SOCKET3)

X4 V

RGB_HEADER

LANGuard

SPDIF_OUT

21 543 62

8912 111314

1

7

16

17

15

16

17

15

10

1.2 Motherboard overview

Place this

side towards

the rear of the

chassis

1-2 Chapter 1: Product introduction

1.2.1 Layout contents

Connectors / Jumpers / Slots / LED Page

1. ATXpowerconnectors(24-pinEATXPWR,8-pinEATX12V) 1-2

2. CPUandchassisfanconnectors(4-pinCPU_FAN,4-pinCHA_FAN1/2) 1-2

3. FanRGBheader(4-pinFAN_RGB_HEADER) 1-3

4. M.2 Socket 3 1-3

5. AMDAM4CPUsocket 1-3

6. DDR4DIMMslots 1-4

7. AMDX370SATA6.0Gb/sports(SATA6G_1~6) 1-4

8. Systempanelconnector(20-5pinPANEL) 1-4

9. USB3.1Gen1connector(20-1pinUSB3_12) 1-4

10. USB2.0connectors(10-1pinUSB3~6) 1-5

11. Serialportconnector(10-1pinCOM) 1-5

12. Digitalaudioconnector(4-1pinSPDIF_OUT) 1-5

13. Frontpanelaudioconnector(10-1pinAAFP) 1-5

14. ClearRTCRAM(2-pinCLRTC) 1-6

15. PCIExpress2.0x1slots 1-6

16. PCIslots 1-6

17. PCIExpressx16slots 1-6

1. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)

TheseconnectorsareforATXpowersupplyplugs.Thepowersupplyplugsare

designedtottheseconnectorsinonlyoneorientation.Findtheproperorientationand

pushdownrmlyuntiltheconnectorscompletelyt.

•

WerecommendthatyouuseanEATX12VSpecication

2.0-compliantpowersupplyunit(PSU)withaminimumof300W

powerrating.ThisPSUtypehas24-pinand8-pinpowerplugs.

•

DONOTforgettoconnectthe4-pin/8-pinATX+12Vpowerplug.

Otherwise,thesystemwillnotbootup.

• WerecommendthatyouuseaPSUwithhigherpoweroutput

whenconguringasystemwithmorepower-consumingdevices

orwhenyouintendtoinstalladditionaldevices.Thesystemmay

become unstable or may not boot up if the power is inadequate.

•

Ifyouareuncertainabouttheminimumpowersupply

requirementforyoursystem,refertotheRecommended

PowerSupplyWattageCalculatorathttp://support.asus.com/

PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for

details.

EATX12V

+12V DC

GND

EATXPWR

PIN 1

GND

+5 Volts

-5 Volts

GND

PSON#

GND

-12 Volts

+3 Volts

+12 Volts

+5V Standby

Power OK

GND

+5 Volts

GND

+5 Volts

GND

+3 Volts

2. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN1/2)

Connectthefancablestothefanconnectorsonthemotherboard,ensuringthatthe

black wire of each cable matches the ground pin of the connector.

ASUS PRIME X370-A 1-3

CHA FAN PWM

CHA FAN IN

CHA FAN PWR

GND

CPU_FAN

CPU FAN PWM

CPU FAN IN

CPU FAN PWR

GND

CHA_FAN2

CHA_FAN1

GND

CHA FAN PWR

CHA FAN IN

CHA FAN PWM

Donotforgettoconnectthefancablestothefan

connectors.Insufcientairowinsidethesystem

may damage the motherboard components. These

arenotjumpers!Donotplacejumpercapsonthefan

connectors!TheCPU_FANconnectorsupportsaCPU

fanofmaximum1A(12W)fanpower.

3. FAN RGB header (4-pin FAN_RGB_HEADER)

ThisheaderisforRGBLEDstripsofaCPU

fan.

TheFANRGBheadersupportsCPUfans

withmulti-colorLEDstrips(12V/G/R/B)

andwithamaximumpowerratingof1A

(12V).

Beforeyouinstallorremoveanycomponent,ensurethattheATXpowersupplyisswitched

offorthepowercordisdetachedfromthepowersupply.Failuretodosomaycausesevere

damagetothemotherboard,peripherals,orcomponents.

4. M.2 socket 3

These sockets allow you to install M.2(NGFF)SSDmodules.

M.2(SOCKET3)

• ThissocketsupportsMKeyand2242/2260/2280/22110storagedevices.

• DuetoCPUlimitation,M.2socketsupportedvariesbyprocessor.Refertothe

specicationssummarytableformoredetails.

5. AMD AM4 CPU socket

ThismotherboardcomeswithanAMDAM4socketdesignedforAMDRyzen™/7th

GenerationA-series/Athlon™processors.

Formoredetails,refertoCentral Processing Unit (CPU).

PIN 1

+12V

GREEN

RED

BLUE

FAN_RGB_HEADER

LED cable

Fan cable

1-4 Chapter 1: Product introduction

7. AMD X370 SATA 6.0Gb/s ports (7-pin SATA6G_1~6)

TheseportsconnecttoSATA6.0Gb/sharddiskdrivesviaSATA

6.0Gb/ssignalcables.

GND

RSATA_TXP

RSATA_TXN

GND

RSATA_RXN

RSATA_RXP

GND

SATA6G

8. System panel connector (20-5 pin PANEL)

Thisconnectorsupportsseveralchassis-mountedfunctions.

• SystempowerLED(4-pinPWR_LED)

This4-pinconnectorisforthesystempowerLED.Connect

thechassispowerLEDcabletothisconnector.Thesystem

powerLEDlightsupwhenyouturnonthesystempower,

and blinks when the system is in sleep mode.

• HarddiskdriveactivityLED(2-pinHDD_LED)

This2-pinconnectorisfortheHDDActivityLED.Connect

theHDDActivityLEDcabletothisconnector.TheHDDLED

lightsuporasheswhendataisreadfromorwrittentothe

HDD.

• Systemwarningspeaker(4-pinSPEAKER)

This4-pinconnectorisforthechassis-mountedsystemwarningspeaker.Thespeaker

allows you to hear system beeps and warnings.

• ATXpowerbutton/soft-offbutton(2-pinPWR_SW)

This connector is for the system power button.

• Resetbutton(2-pinRESET)

This 2-pin connector is for the chassis-mounted reset button for system reboot without

turning off the system power.

PLED+

PLED-

PWR

Ground

+5V_SPKO

Ground

Speaker

HDD_LED+

HDD_LED-

Ground

RESET

NC

PLED+

PLED-

PIN 1

+PWR_LED-

SPEAKER

PANEL

+HDD_LED-

PWR_SW

RESET

* Requires an ATX power supply

9. USB 3.1 Gen 1 connector (20-1 pin USB3_12)

ThisconnectorallowsyoutoconnectaUSB3.1Gen1

moduleforadditionalUSB3.1Gen1frontorrearpanel

ports.WithaninstalledUSB3.1Gen1module,youcan

enjoyallthebenetsofUSB3.1Gen1includingfaster

datatransferspeedsofupto5Gbps,fasterchargingtime

forUSB-chargeabledevices,optimizedpowerefciency

andbackwardcompatibilitywithUSB2.0.

USB3_12

PIN 1

USB3+5V

IntA_P1_SSRX-

IntA_P1_SSRX+

GND

IntA_P1_SSTX-

IntA_P1_SSTX+

GND

IntA_P1_D-

IntA_P1_D+

GND

USB3+5V

IntA_P2_SSRX-

IntA_P2_SSRX+

GND

IntA_P2_SSTX-

IntA_P2_SSTX+

GND

IntA_P2_D-

IntA_P2_D+

6. DDR4 DIMM slots

Install2GB,4GB,8GB,and16GBunbufferedECCandnon-ECCDDR4DIMMsinto

theseDIMMsockets.

Formoredetails,refertoSystem memory.

ASUS PRIME X370-A 1-5

10. USB 2.0 connectors (10-1 pin USB3~6)

TheseconnectorsareforUSB2.0ports.ConnecttheUSBmodule

cabletoanyoftheseconnector,theninstallthemoduletoaslot

openingatthebackofthesystemchassis.TheseUSBconnectors

complywithUSB2.0specicationsandsupportsupto480Mbps

connection speed.

Neverconnecta1394cabletotheUSBconnectors.Doingso

will damage the motherboard!

USB+5V

USB_P3-

USB_P3+

GND

NC

USB+5V

USB_P4-

USB_P4+

GND

USB34

PIN 1

11. Serial port connector (10-1 pin COM)

Thisconnectorisforaserial(COM)port.Connecttheserialport

modulecabletothisconnector,theninstall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

12. Digital audio connector (4-1 pin SPDIF_OUT)

ThisconnectorisforanadditionalSony/PhilipsDigitalInterface(S/

PDIF)port.ConnecttheS/PDIFOutmodulecabletothisconnector,

then install the module to a slot opening at the back of the system

chassis.

SPDIF_OUT

+5V

SPDIFOUT

GND

13. Front panel audio connector (10-1 pin AAFP)

This connector is for a chassis-mounted front panel

audioI/OmodulethatsupportseitherHDAudioor

legacyAC`97audiostandard.Connectoneendofthe

frontpanelaudioI/Omodulecabletothisconnector.

AAFP

AGND

NC

SENSE1_RETUR

SENSE2_RETUR

PORT1 L

PORT1 R

PORT2 R

SENSE_SEND

PORT2 L

HD-audio-compliant

pin definition

PIN 1

AGND

NC

MIC2

MICPWR

Line out_R

NC

Line out_L

Legacy AC’97

compliant definition

• Werecommendthatyouconnectahigh-denitionfrontpanelaudiomoduletothis

connectortoavailofthemotherboard’shigh-denitionaudiocapability.

• Ifyouwanttoconnectahigh-denitionfrontpanelaudiomoduletothisconnector,set

the Front Panel TypeitemintheBIOSsetupto[HD].IfyouwanttoconnectanAC’97

frontpanelaudiomoduletothisconnector,settheitemto[AC97].Bydefault,this

connectorissetto[HD].

1-6 Chapter 1: Product introduction

15. PCI Express 2.0 x1 slots

ThismotherboardhastwoPCIExpress2.0x1slotsthatsupportPCIExpressx1

networkcards,SCSIcards,andothercardsthatcomplywiththePCIExpress

specications.

16. PCI slots

ThePCIslotssupportcardssuchasLANcard,SCSIcard,USBcard,andothercards

thatcomplywiththePCIspecications.

17. PCI Express x16 slots

ThismotherboardsupportstwoPCIExpressx16graphiccardsthatcomplywiththe

PCIExpressspecications.

VGAconguration PCI Express operating mode

PCIe 3.0/ 2.0 x16_1 (gray) PCIe 2.0 x16_2

Single VGA / PCIe card

x16(onAMDRyzen™processors)

N/A

x8(onAMD7thGenerationA-series/

Athlon™processors)

Dual VGA / PCIe cards

x16(onAMDRyzen™processors)

x4

x8(onAMD7thGenerationA-series/

Athlon™processors)

• InsingleVGAcardmode,usethePCIe3.0/2.0x16_1slot(gray)foraPCIExpress

x16graphicscardtogetbetterperformance.

• WerecommendthatyouprovidesufcientpowerwhenrunningCrossFireX™mode.

• ConnectachassisfantothemotherboardconnectorlabeledCHA_FAN1/2when

usingmultiplegraphicscardsforbetterthermalenvironment.

To erase the RTC RAM:

1. TurnOFFthecomputerandunplugthepowercord.

2. Useametalobjectsuchasascrewdrivertoshortthetwopins.

3. PlugthepowercordandturnONthecomputer.

4. Holddownthe<Del>keyduringthebootprocessandenterBIOS

setup to re-enter data.

Ifthestepsabovedonothelp,removetheonboardbatteryandshortthetwopinsagainto

cleartheCMOSRTCRAMdata.AfterclearingtheCMOS,reinstallthebattery.

CLRTC

+3V_BAT

GND

PIN 1

14. Clear RTC RAM (2-pin CLRTC)

ThisheaderallowsyoutocleartheRealTimeClock(RTC)RAMinCMOS.Youcan

cleartheCMOSmemoryofdate,andsystemsetupparametersbyerasingtheCMOS

RTCRAMdata.TheonboardbuttoncellbatterypowerstheRAMdatainCMOS,which

include system setup information such as system passwords.

ASUS PRIME X370-A 1-7

A B C D E F G H

PCIEx16_1 – – – shared – – – –

PCIEx16_2 shared – – – – – – –

PCIEx1_1 shared – – – – – – –

PCIEx1_2 – – – shared – – – –

PCI1 shared – – – – – – –

PCI2 – shared – – – – – –

M.2 – – – shared – – – –

CPUUSB3.1Gen1XHCI

controller – – shared – – – – –

AMDPromonotryChip

XHCIcontroller shared – – – – – – –

SATAcontroller – – – shared – – – –

HDaudiocontroller – – – – – – shared –

RealtekLANcontroller – – shared – – – – –

IRQ assignments for this motherboard

• For7thGenerationA-series/Athlon™processors

A B C D E F G H

PCIEx16_1 – – – – – – shared –

PCIEx16_2 shared – – – – – – –

PCIEx1_1 shared – – – – – – –

PCIEx1_2 – – – shared – – – –

PCI1 shared – – – – – – –

PCI2 – shared – – – – – –

M.2 shared – – – – – – –

CPUUSB3.1Gen1XHCI

controller – – – – – – – shared

AMDPromonotryChip

XHCIcontroller shared – – – – – – –

SATAcontroller – shared – – – – – –

HDaudiocontroller – – – shared – – – –

RealtekLANcontroller – – shared – – – – –

• ForRyzen™processors

WhenusingPCIcardsonsharedslots,ensurethatthedriverssupport“ShareIRQ”orthat

thecardsdonotneedIRQassignments.Otherwise,conictswillarisebetweenthetwoPCI

groups,makingthesystemunstableandthecardinoperable.

1-8 Chapter 1: Product introduction

1.2.2 Rear panel connectors

1. PS/2 keyboard/mouse combo port.ThisportisforaPS/2mouseorkeyboard.

2. Video Graphics Adapter (VGA) port.This15-pinportisforaVGAmonitororother

VGA-compatibledevices.

3. USB 3.1 Gen 1 ports.Thesetwo9-pinUniversalSerialBus(USB)portsconnectto

USB3.1Gen1devices.

• USB3.1Gen1devicescanonlybeusedfordatastorage.

• DuetothedesignofAMDAM4serieschipset,allUSBdevicesconnectedtotheUSB

2.0andUSB3.1Gen1portsarecontrolledbythexHCIcontroller.

4. USB 3.1 Gen 2 ports (teal blue, Type A).These9-pinUniversalSerialBus3.1(USB

3.1Gen2)portsareforUSB3.1Gen2devices.

5. LAN (RJ-45) port.ThisportallowsGigabitconnectiontoaLocalAreaNetwork(LAN)

throughanetworkhub.RefertothetablebelowfortheLANportLEDindications.

1

11

4 5

3

36 7

8

9

2

10

LAN port

Speed

LED

Activity Link

LED

Activity/Link LED Speed LED

Status Description Status Description

Off Nolink OFF 10Mbpsconnection

Orange Linked ORANGE 100Mbpsconnection

Orange(Blinking) Dataactivity GREEN 1Gbpsconnection

Orange(Blinking

thensteady)

Readytowake

up from S5 mode

LAN port LED indications

6. Line In port (light blue).Thisportconnectstothetape,CD,DVDplayer,orother

audio sources.

7. Line Out port (lime).Thisportconnectstoaheadphoneoraspeaker.Inthe4.1,5.1

and7.1-channelcongurations,thefunctionofthisportbecomesFrontSpeakerOut.

8. Microphone port (pink). This port connects to a microphone.

Refertotheaudiocongurationtableforthefunctionoftheaudioportsin2.1,4.1,5.1,or

7.1-channelconguration.

ASUS PRIME X370-A 1-9

9. HDMI port. ThisportisforaHigh-DenitionMultimediaInterface(HDMI)connector,

andisHDCPcompliantallowingplaybackofHDDVD,Blu-Ray,andotherprotected

content.

10. DVI-D port.ThisportisforanyDVI-Dcompatibledevice.

DVI-DcannotbeconvertedtooutputfromRGBSignaltoCRTandisnotcompatiblewith

DVI-I.

11. USB 2.0 ports.These4-pinUniversalSerialBus(USB)portsareforUSB2.0/1.1

devices.

Audio2.1,4.1,5.1,or7.1-channelconguration

Port Headset

2.1-channel 4.1-channel 5.1-channel 7.1-channel

LightBlue(Rearpanel) LineIn RearSpeakerOut RearSpeakerOut RearSpeakerOut

Lime(Rearpanel) LineOut FrontSpeakerOut FrontSpeakerOut FrontSpeakerOut

Pink(Rearpanel) MicIn MicIn Bass/Center Bass/Center

Lime(Frontpanel) - - - SideSpeakerOut

1-10 Chapter 1: Product introduction

1.3 Central Processing Unit (CPU)

ThemotherboardcomeswithanAMDAM4socketdesignedfor

AMDRyzen™/7thGenerationA-series/Athlon™processors.

UnplugallpowercablesbeforeinstallingtheCPU.

TheAM4sockethasadifferentpinoutfromtheFM2+/FM2socket.Ensurethatyouusea

CPUdesignedfortheAM4socket.TheCPUtsinonlyonecorrectorientation.DONOT

forcetheCPUintothesockettopreventbendingthepinsanddamagingtheCPU!

Installing the CPU

ApplytheThermalInterfaceMaterialtotheCPUheatsinkandCPUbeforeyouinstallthe

heatsink and fan if necessary.

1

3

2

4

ASUS PRIME X370-A 1-11

Installing the CPU heatsink and fan assembly

Type 2

Type 1

1

3

2

4

Removethescrewsandtheretentionmoduleonly.Donotremovetheplateonthe

bottom.

1-12 Chapter 1: Product introduction

1.4 System memory

Overview

ThismotherboardcomeswithfourDoubleDataRate4(DDR4)DualInlineMemoryModule

(DIMM)sockets.ThegureillustratesthelocationoftheDDR4DIMMsockets:

Channel Sockets

ChannelA DIMM_A1&DIMM_A2

ChannelB DIMM_B1&DIMM_B2

• YoumayinstallvaryingmemorysizesinChannelAandChannelB.Thesystem

mapsthetotalsizeofthelower-sizedchannelforthedual-channelconguration.Any

excessmemoryfromthehigher-sizedchannelisthenmappedforsingle-channel

operation.

• AlwaysinstallDIMMswiththesameCASlatency.Foroptimalcompatibility,we

recommendthatyouinstallmemorymodulesofthesameversionordatecode(D/C)

fromthesamevendor.Checkwiththeretailertogetthecorrectmemorymodules.

• Forsystemstability,useamoreefcientmemorycoolingsystemtosupportafull

memoryload(4DIMMs).

• Refertowww.asus.comforthelatestMemoryQVL(QualiedVendorsList)

DIMM_A1

DIMM_A2

DIMM_B1

DIMM_B2

Recommendedmemorycongurations

Installing a DIMM

12

To remove a DIMM

B

A

B

A

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