ASRock X399M Taichi Service Manual

Version 1.0

Published February 2018

Copyright©2018 ASRock INC. All rights reserved.

Copyright Notice:

No part of this documentation may be reproduced, transcribed, transmitted, or
translated in any language, in any form or by any means, except duplication of
documentation by the purchaser for backup purpose, without written consent of
ASRock Inc.

Products and corporate names appearing in this documentation may or may not
be registered trademarks or copyrights of their respective companies, and are used
only for identication or explanation and to the owners’ benet, without intent to

infringe.

Disclaimer:

Specications and information contained in this documentation are furnished for
informational use only and subject to change without notice, and should not be
constructed as a commitment by ASRock. ASRock assumes no responsibility for
any errors or omissions that may appear in this documentation.

With respect to the contents of this documentation, ASRock does not provide
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties or conditions of merchantability or tness for a particular
purpose.

In no event shall ASRock, its directors, ocers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of prots, loss of business, loss of data, interruption of business and the like),
even if ASRock has been advised of the possibility of such damages arising from any
defect or error in the documentation or product.

is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that

may cause undesired operation.

CALIFORNIA, USA ONLY

e Lithium 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)

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

Chapter 2 Installation 13

2.1 Installing the CPU 14

2.2 Installing the CPU Liquid Cooler 18

2.3 Installation of Memory Modules (DIMM) 20

2.4 Expansion Slots (PCI Express Slots) 22

2.5 Onboard Headers and Connectors 23

2.6 Smart Switches 28

2.7 Dr. Debug 30

2.8 SLITM and Quad SLITM Operation Guide 32

2.8.1 Installing Two SLITM-Ready Graphics Cards 32

2.8.2 Driver Installation and Setup 34

2.9 CrossFireXTM and Quad CrossFireXTM Operation Guide 35

2.9.1 Installing Two CrossFireXTM-Ready Graphics Cards 35

2.9.2 Driver Installation and Setup 37

2.10 M.2_SSD (NGFF) Module Installation Guide (M2_1) 38

2.11 M.2_SSD (NGFF) Module Installation Guide (M2_2) 41

2.12 M.2_SSD (NGFF) Module Installation Guide (M2_3) 44

Chapter 3 Software and Utilities Operation 48

3.1 Installing Drivers 48

3.2 A-Tuning 49

3.2.1 Installing A-Tuning 49

3.2.2 Using A-Tuning 49

3.3 ASRock Live Update & APP Shop 52

3.3.1 UI Overview 52

3.3.2 Apps 53

3.3.3 BIOS & Drivers 56

3.3.4 Setting 57

3.4 ASRock RGB LED 58

Chapter 4 UEFI SETUP UTILITY 60

4.1 Introduction 60

4.2 EZ Mode 61

4.3 Advanced Mode 62

4.3.1 UEFI Menu Bar 62

4.3.2 Navigation Keys 63

4.4 Main Screen 64

4.5 OC Tweaker Screen 65

4.6 Advanced Screen 68

4.6.1 CPU Conguration 69

4.6.2 North Bridge Conguration 70

4.6.3 South Bridge Conguration 71

4.6.4 Storage Conguration 72

4.6.5 Super IO Conguration 73

4.6.6 ACPI Conguration 74

4.6.7 Trusted Computing 75

4.6.8 AMD PBS 76

4.6.9 AMD CBS 77

4.7 Tools 85

4.8 Hardware Health Event Monitoring Screen 87

4.9 Security Screen 89

4.10 Boot Screen 90

4.11 Exit Screen 92

Chapter 1 Introduction

ank you for purchasing ASRock X399M Taichi 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 documentation, 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 documentation will be subject to change without notice. In case any modi­cations of this documentation occur, the updated version will be available on ASRock’s
website w ithout further notice. If you require technical support related to this mother­board, please visit our website for speci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.

X399M Taichi

1.1 Package Contents

ASRock X399M Taichi Motherboard (Micro ATX Form Factor)

•

ASRock X399M Taichi Quick Installation Guide

•

ASRock X399M Taichi Support CD

•

1 x I/O Panel Shield

•

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

•

1 x ASRock SLI_HB_Bridge_1S Card (Optional)

•

1 x ASRock SLI_HB_Bridge_2S Card (Optional)

•

2 x ASRock WiFi 2.4/5 GHz Antennas (O pt iona l)

•

3 x Screws for M.2 Sockets (Option al)

•

English

1

1.2 Specications

Platform

CPU

Chipset

Memory

* Please refer to Memory Support List on ASRock’s website for

more information. (http://www.asrock.com/)

Expansion
Slot

* Supports NVMe SSD as boot disks

Micro ATX Form Factor

•

8 Layer PCB

•

2oz Copper PCB

•

Supports AMD TR4 Socket Ryzen readripper Series CPUs

•

IR Digital PWM

•

11 Power Phase design

•

AMD X399

•

Quad Channel DDR4 Memory Technology

•

4 x DDR4 DIMM Slots

•

Supports DDR4 3600+(OC)/3200(OC)/2933(OC)/

•

2667/2400/2133 ECC & non-ECC, un-buered memory

(U-DIMM)*

Max. capacity of system memory: 64GB

•

15μ Gold Contact in DIMM Slots

•

3 x PCI Express 3.0 x16 Slots (PCIE1/PCIE2/PCIE3: single at

•

x16 (PCIE1); dual at x16 (PCIE1) / x16 (PCIE2); triple at x16

(PCIE1) / x16 (PCIE2) / x16 (PCIE3))*

Supports AMD Quad CrossFireXTM and CrossFireXTM

•

Supports NVIDIA® Quad SLITM and SLI

•

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

•

802.11ac module (on the rear I/O)

15μ Gold Contact in VGA PCIe Slot (PCIE1, PCIE2 and

•

PCIE 3)

TM

English

2

Audio

7.1 CH HD Audio with Content Protection (Realtek

•

ALC1220 Audio Codec)

Premium Blu-ray Audio support

•

Supports Surge Protection

•

LAN

Supports Purity SoundTM 4

•

- Nichicon Fine Gold Series Audio Caps

- 120dB SNR DAC with Dierential Amplier

- NE5532 Premium Headset Amplier for Front Panel

Audio Connector (Supports up to 600 Ohm headsets)

- Pure Power-In

- Direct Drive Technology

- PCB Isolate Shielding

- Impedance Sensing on Line Out port

- Individual PCB Layers for R/L Audio Channel

- Gold Audio Jacks

- 15μ Gold Audio Connector

Supports DTS Connect

•

Gigabit LAN 10/100/10 00 Mb/s

•

2 x GigaLAN Intel® I211AT

•

Supports Wake-On-LAN

•

Supports Lightning/ESD Protection

•

Supports Dual LAN with Teaming*

•

* Teaming is supported on Windows® 10 RS2 and above.

Supports Energy Ecient Ethernet 802.3az

•

Supports PXE

•

X399M Taichi

Wireless
LAN

Rear Panel
I/O

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 PS/2 Mouse/Keyboard Port

•

1 x Optical SPDIF Out Port

•

1 x USB 3.1 Gen2 Type-A Port (10 Gb/s) (Supports ESD

•

Protection)

1 x USB 3.1 Gen2 Type-C Port (10 Gb/s) (Supports ESD

•

Protection)

8 x USB 3.1 Gen1 Ports (Supports ESD Protection)

•

* Ultra USB Power is supported on USB3_5 port.

* ACPI wake-up function is not supported on USB3_5 port.

English

3

English

Storage

Connector

2 x RJ-45 LAN Ports with LED (ACT/LINK LED and SPEED

•

LED)

1 x BIOS Flashback Button

•

HD Audio Jacks: Rear Speaker / Centra l / Bass / Line in /

•

Front Speaker / Microphone (Gold Audio Jacks)

8 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

•

2242/2260/2280/22110 M.2 PCI Express module up to Gen3

x4 (32 Gb/s)*

1 x Ultra M.2 Socket (M2_2), supports M Key ty pe

•

2242/2260/2280 M.2 PCI Express module up to Gen3 x4

(32 Gb/s)*

1 x Ultra M.2 Socket (M2_3), supports M Key ty pe

•

2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2

PCI Express module up to Gen3 x4 (32 Gb/s)*

* Supports NVMe RAID (R AID 0, RAID 1 and RAID 10)

* Supports NVMe SSD as boot disks

* Supports ASRock U.2 Kit

1 x U.2 Connector

•

* If U.2 Connector is plugged, M2_1 will be disabled

1 x TPM 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 CPU Fan Connector (4-pin)

•

* e CPU Fan Connector supports the CPU fan of ma ximum

1A (12W) fan power.

1 x CPU Optional/Water Pump Fan Connector (4-pin)

•

(Smart Fan Speed Control)

* e CPU Optional/Water Pump Fan supports the water cooler

fan of maximum 1.5A (18W) fan power.

2 x Chassis Fan Connectors (4-pin) (Smart Fan Speed

•

Control)

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

•

(Smart Fan Speed Control)

* e Chassis Optiona l/Water Pump Fan supports the water

cooler fan of maximum 1.5A (18W) fan power.

4

X399M Taichi

* CPU_FAN1, CHA_FAN1, CHA_FAN2, CPU_OPT/W_PUMP

and CHA _FAN3/W_PUMP can auto detect if 3-pin or 4-pin fan

is in use.

1 x 24 pin ATX Power Connector (Hi-Density Power

•

Connector)

1 x 8 pin 12V Power Connector (Hi-Density Power

•

Connec tor)

1 x 4 pin 12V Power Connector (Hi-Density Power

•

Connector)

1 x Front Panel Audio Connector (15μ Gold Audio

•

Connector)*

1 x Right Angle Front Panel Audio Connector*

•

* Connect the audio device to either one of the audio

connectors.

2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports

•

ESD Protection)

2 x USB 3.1 Gen1 Headers (Support 4 USB 3.1 Gen1 ports)

•

(Supports ESD Protection)

1 x Clear CMOS Button

•

1 x Dr. Debug with LED

•

1 x Power Button

•

1 x Reset Button

•

1 x CPU Xtreme OC Switch

•

BIOS
Feature

Hardware
Monitor

AMI UEFI Legal BIOS with GUI support

•

Supports “Plug and Play”

•

ACPI 5.1 compliance wake up events

•

Supports jumperfree

•

SMBIOS 2.3 support

•

CPU, VCORE_NB, DRAM, VPPM, PCH 1.05V, +1.8V,

•

VDDP, PROM 2.5V, Voltage Multi-adjustment

Temperature Sensing: CPU, CPU Optional/Water Pump,

•

Chassis, Chassis Optional/Water Pump Fans

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

•

Chassis Optional/Water Pump Fans

Quiet Fan (Auto adjust chassis fan speed by CPU

•

temperature): CPU, CPU Optional/Water Pump, Chassis,

Chassis Optional/Water Pump Fans

English

5

Fan Multi-Speed Control: CPU, CPU Optional/Water Pump,

•

Chassis, Chassis Optional/Water Pump Fans

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

•

NB, DRAM, PCH 1.05V, +1.8V, VDDP

Microso® Windows® 10 64-bit

OS

Certica­tions

* 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 Overclocking Technolog y, or using third-party
overclocking to ols. O verclocking may aect your system’s stability, or even c ause damage to
the components and devices of your system. It should be don e at your ow n risk and expense.
We are not responsibl e for possible damage caused by overclo cking.

•

FCC, CE

•

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

•

English

6

ATXP WR1

AMD
X399

LAN

LAN

Top:

Central/Bass

Center :

REAR SPK

Top:

LINE IN

Center :

FRONT

Bottom :

Optica l

SPDIF

Bottom :

MIC IN

HDLED RESET

PLED PWRBTN

PANEL1

1

1

HD_AUDIO1

1

HD_AUDIO_RA1

SATA3_5_ 6

SATA3_3_ 4

CPU_FAN1

RoH S

11

12

16

17

18

SATA3_1_ 2

19

25 2428 27

CLRC
BTN1

PWRBTN1

BIOS
_FB1

SATA3_7_ 8

21

2223 2021

M2_WIFI_1

CHA_FAN1

TR4 Socket
(4094 pins)

USB3_11 _12

1

SPK_PLED1

Top:
RJ-45

USB 3.1 Gen2
T: USB31_TA_1
B: USB31_TC_1

AUDIO
CODEC

14

13

15

1

29

RGB_LED1

1

26

Top:
RJ-45

USB 3.1 Gen1
T: USB7
B: USB8

USB 3.1 Gen1
T: USB5
B: USB6

PCIE1

CHA_FAN3/
W_PUMP

CPU_OPT/
W_PUMP

USB 3.1 G en1

T: USB1

B: USB2

PS2

Keyb oard

/Mou se

ATX12V2

BIOS
ROM

U2_1

USB 3.1 Gen1
T: USB3
B: USB4

CHA_FAN2

1

USB3_9_10

USB_3_4

1

1

USB_1_2

M2_2

M2_3

MOS_PROCHOT1

ON

OFF

X399M Taichi

DDR 4_C1 (6 4 bit, 28 8-pin m odule )

DDR 4_D1 (6 4 bit, 28 8-pin m odule )

3

DDR 4_A1 (6 4 bit, 28 8-pin m odule )

DDR 4_B1 (6 4 bit, 28 8-pin m odule )

4

5

6

7

8

1

TPMS1

M2_ 1

PCIE2

PCIE3

9

10

Dr.

Debug

RSTBTN1

1.3 Motherboard Layout

X399M Taichi

English

7

No. Description

1 Chassis Fan / Waterpump Fan Connector (CHA_FAN3/W_PUMP)

2 4 pin 12V Power Connector (ATX12V2)

3 2 x 288-pin DDR4 DIMM Slots (DDR4_D1, DDR4_C1)

4 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)

5 CPU Xtreme OC Switch (MOS_PROCHOT1)

6 8 pin 12V Power Connector (ATX12V1)

7 CPU Fan Connector (CPU_FAN1)

8 CPU Fan / Waterpump Fan Connector (CPU_OPT/W_PUMP)

9 Power Button (PWRBTN1)

10 Reset Button (RSTBTN1)

11 ATX Power Connector (ATXPWR1)

12 U.2 Connector (U2_1)

13 USB 2.0 Header (USB_3_4)

14 USB 3.1 Gen1 Header (USB3_11_12)

15 USB 2.0 Header (USB_1_2)

16 SATA3 Connectors (SATA3_7_8)

17 SATA3 Connectors (SATA3_5_6)

18 SATA 3 C onnectors (SATA 3_3_4)

19 SATA3 Connectors (SATA3_1_2)

20 System Panel Header (PANEL1)

21 USB 3.1 Gen1 Header (USB3_9_10)

22 Power LED and Speaker Header (SPK_PLED1)

23 Chassis Fan Connector (CHA_FAN2)

24 Clear CMOS Button (CLRCBTN1)

25 TPM Header (TPMS1)

26 RGB LED Header (RGB_LED1)

27 Right Angle Front Panel Audio Header (HD_AUDIO_RA1)

28 Front Panel Audio Header (HD_AUDIO1)

29 Chassis Fan Connector (CHA_FAN1)

English

8

1.4 I/O Panel

1

325

X399M Taichi

4

6

7

16

No. Description No. Description

1 PS/2 Mouse/Keyboard Port (PS2_KB1) 10 USB 3.1 Gen1 Ports (USB3_7_8)

2 Central / Bass (Orange) 11 USB 3.1 Gen1 Ports (USB3_5_6)***

3 Rear Speaker (Black) 12 Microphone (Pink)

4 Line In (Light Blue) 13 Optical SPDIF Out Port

5 Front Speaker (Lime)** 14 USB 3.1 Gen1 Ports (USB3_3_4)

6 LAN RJ-45 Port (Intel® I211AT)* 15 Antenna Ports

7 LAN RJ-45 Port (Intel® I211AT)* 16 USB 3.1 Gen1 Port (USB3_1_2)

8 USB 3.1 Gen2 Type-A Port (USB31_TA_1) 17 BIOS Flashback Button

9 USB 3.1 Gen2 Type-C Port (USB31_TC_1)

* 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

15 101417

1213 8

11

9

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

English

9

** If you use a 2- channel speaker, plea se connect the speake r’s plug into “Front Spea ker Jack”. See the table below

for connection d etails in accordance w ith the type of speaker you use.

Audio Output

Channels

Front Speaker

(No. 5)

Rear Speaker

(No. 3)

Central / Bass

(No. 2)

2 V -- -- --
4 V V -- --
6 V V V --
8 V V V V

To enable Multi-Streaming, you need to connect a front panel audio cable to the front
panel au dio header. Aer re starting your computer, you will nd the “Mixe r” tool on your
system. Plea se sele ct “Mixe r ToolBox” , click “Enable playback multi-streaming”, and
click “ok”. Choose “2CH”, “4CH”, “6CH”, or “8CH” and then you are a llowed to select
“Realtek HDA Primary output” to u se the Rear Speaker, Central/Ba ss, and Front Speaker,
or select “Realtek HDA Audio 2nd output” to use the front panel audio.

*** ACPI wake-up function is not supported on USB3_ 5 port.

Line In

(No. 4)

English

10

USB3_5

X399M Taichi

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.

11

English

WiFi Antennas Installation Guide

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.

English

12

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

•

components. Failure to do so may cause physical injuries 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.

X399M Taichi

13

English

2.1 Installing the CPU

Tutorial Video

Unplug all power cables be fore installing the CPU.

1

English

14

2

X399M Taichi

3

4

15

English

5

Carrier Fram e with CPU

Rail Frame

Please make sure that the carrier

frame with CPU is closely attached to

the rail frame while inserting it.

English

Install the orange carrier frame with CPU. Don’t separate them.

6

16

X399M Taichi

7

8

17

English

2.2 Installing the CPU Liquid Cooler

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

1

English

18

2

X399M Taichi

3

4

English

19

2.3 Installation of Memory Modules (DIMM)

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

and supports Quad 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.

Memory Conguration

Option 1 2 3

DDR4_D1

DDR4_C1

DDR4_A1

DDR4_B1

If only two memory modules are installed in the DDR4 DIMM slots, you can either

•

Populated Populated

Populated Populated

install the memory modules on DDR4_ A1, DDR4_B1 or DDR4_C1, DDR4_D1.

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.

Populated Populated

Populated Populated

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X399M Taichi

1

2

3

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2.4 Expansion Slots (PCI Express Slots)

ere are 3 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 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.

PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.

PCIe Slot Congurations

PCIE1 PCIE2 PCIE3

Single Graphics Card x16 N/A N/A

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Two Graphics Cards in

x16

x16

CrossFireXTM or SLITM

Mode

For a better ther mal environme nt, ple ase connect a ch assis fan to the motherboard’s
chassis fan connector (CHA_ FAN1 or CHA_ FAN2 ) when u sing multiple graphics
cards.

x16

N/A

N/A

x16