ASROCK X299 TAICHI CLX User manual

Version 1.0
Published October 2019
Copyright©2019 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 www.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 type
Function Frequency Maximum Output Power (EIRP)
WiFi
2400-2483.5 MHz 18.5 + / -1.5 dbm
5150-5250 MHz 21.5 + / -1.5 dbm
5250-5350 MHz 18.5 + / -1.5 dbm (no TPC)
21.5 + / -1.5 dbm (TPC)
5470-5725 MHz 25.5 + / -1.5 dbm (no TPC)
28.5 + / -1.5 dbm (TPC)
Bluetooth 2400-2483.5 MHz 8.5 + / -1.5 dbm

English
1
X299 Taichi CLX
Motherboard Layout
ATXPWR1
Intel
X299
ATX12V2
LAN
LAN
PCIE1
Top:
Central/Bass
Center:
REAR SPK
Top:
LIN E IN
Center:
FRONT
Bottom:
Optical
SPDIF
Bottom:
MIC I N
PCIE3
USB3_4
11
USB5_6
1
HD_AUDIO1
PCIE5
SATA3_2_3
SATA3_4_5
PCIE4
CPU_FAN1
RoHS
9
10
15
16
17
SATA3_6_7
18
2930 23 36 26
CLRC
BTN1
SATA3_0_1
358
DDR4_B2 (64 bit, 288-pin module)
DDR4_B1 (64 bit, 288-pin module)
DDR4_A2 (64 bit, 288-pin module)
DDR4_A1 (64 bit, 288-pin module)
2
1
31 22
CLRMOS1
1
M2_WIFI_1
TBT_M2_1
35
DDR4_C1 (64 bit, 288-pin module)
DDR4_C2 (64 bit, 288-pin module)
DDR4_D1 (64 bit, 288-pin module)
DDR4_D2 (64 bit, 288-pin module)
7
6
BIOS_A_LED1
BIOS_B_LED1
2066 Socket
Dr.
Debug
1
SPK_PLED1
M2_1
M2_3
M2_2
SATA3_A1_A2
19
11
1
USB3_5_6
14
20
21
T B1
1
RGB_HEADER1
1
RGB_HEADER2
1
32
PCIE2
CHA_FAN2/
W_PUMP
Purity
Sound 4
TM
Power
ADDR_LED1
1
ADDR_LED2
1
VROC1
1
33
ATX12V1
4
CPU_FAN2
/WP
CHA_FAN3
/WP
CHA_FAN1
/WP
12
USB32_TC1
13
1
SPI_TPM_J1
BIOS_A1
BIOS_B1
BIOS
BIOS
HDLED RESET
PLED PWRBTN
PANEL1
1
24
25
27
CHA_FAN4
/WP
28
CHA_FAN5
/WP
34
USB 3.2 Gen1
T: USB1
B: USB2
USB 2.0
T: USB1
B: USB2
USB 3.2 Gen1
T: USB3
B: USB4
Top:
2.5GLAN
(Realtek
RTL8125AG)
Top:
RJ-45
(I219V )

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No. Description
1 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
2 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
3 ATX 12V Power Connector (ATX12V2)
4 ATX 12V Power Connector (ATX12V1)
5 Addressable LED Header (ADDR_LED2)
6 2 x 288-pin DDR4 DIMM Slots (DDR4_C2, DDR4_D2)
7 2 x 288-pin DDR4 DIMM Slots (DDR4_C1, DDR4_D1)
8 RGB LED Header (RGB_HEADER2)
9 ATX Power Connector (ATXPWR1)
10 CPU Fan Connector (CPU_FAN1)
11 Chassis / Waterpump Fan Connector (CHA_FAN1/WP)
12 CPU / Waterpump Fan Connector (CPU_FAN2/WP)
13 Front Panel Type C USB 3.2 Gen2 Header (USB32_TC1)
14 USB 3.2 Gen1 Header (USB3_5_6)
15 SATA3 Connectors (SATA3_0_1)
16 SATA3 Connectors (SATA3_2_3)
17 SATA3 Connectors (SATA3_4_5)
18 SATA3 Connectors (SATA3_6_7)
19 SATA3 Connectors (SATA3_A1_A2)
20 SPI TPM Header (SPI_TPM_J1)
21 Power LED and Speaker Header (SPK_PLED1)
22 System Panel Header (PANEL1)
23 Power Button (PWRBTN1)
24 Reset Button (RSTBTN1)
25 Chassis / Waterpump Fan Connector (CHA_FAN2/WP)
26 Clear CMOS Jumper (CLRMOS1)
27 Chassis / Waterpump Fan Connector (CHA_FAN3/WP)
28 Chassis / Waterpump Fan Connector (CHA_FAN4/WP)
29 USB 2.0 Header (USB5_6)
30 USB 2.0 Header (USB3_4)
31 Addressable LED Header (ADDR_LED1)
32 RGB LED Header (RGB_HEADER1)
33 Virtual RAID On CPU Header (VROC1)
34 Chassis / Waterpump Fan Connector (CHA_FAN5/WP)
35 underbolt AIC Connector (TB1)
36 Front Panel Audio Header (HD_AUDIO1)

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X299 Taichi CLX
I/O Panel
No. Description No. Description
1 LAN RJ-45 Port (Intel® I219V)* 8 Microphone (Pink)
2 2.5G LAN RJ-45 Port 9 Optical SPDIF Out Port
(Dragon RTL8125AG)** 10 USB 3.2 Gen1 Port (USB3_3_4)****
3 Central / Bass (Orange) 11 USB 3.2 Gen1 Port (USB3_1_2)
4 Rear Speaker (Black) 12 USB 2.0 Port (USB2_1_2)
5 Line In (Light Blue) 13 Antenna Ports
6 Front Speaker (Lime)*** 14 Clear CMOS Button
7 USB 3.2 Gen2x2 Type-C Port (ASMedia ASM3242)
* ere are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.
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
ACT/LINK LED
SPEED LED
LAN Port
8 7914
6
5
4
3
1213 10
2
11
1

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4
** ere are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.
Activity / Link LED Speed LED
Status Description Status Description
O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps/1Gbps connection
On Link Green 2.5Gbps connection
*** If you use a 2-channel speaker, please connect the speaker’s plug into “Front Speaker Jack”. See the table below
for connection details in accordance with the type of speaker you use.
Audio Output
Channels
Front Speaker
(No. 6)
Rear Speaker
(No. 4)
Central / Bass
(No. 3)
Line In
(No. 5)
2V -- -- --
4V V -- --
6V V V --
8V V V V
**** ACPI wake-up function is not supported on USB3_3_4 ports.
ACT/LINK LED
SPEED LED
LAN Port
Chapter 1 Introduction
ank you for purchasing ASRock X299 Taichi CLX 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.
1.1 Package Contents
• ASRock X299 Taichi CLX Motherboard (ATX Form Factor)
• ASRock X299 Taichi CLX Quick Installation Guide
• ASRock X299 Taichi CLX Support CD
• 1 x ASRock SLI_HB_Bridge_2S Card (Optional)
• 1 x ASRock WiFi 2.4/5 GHz Antenna (Optional)
• 1 x ASRock Screwdriver (Optional)
• 4 x Serial ATA (SATA) Data Cables (Optional)
• 3 x Screws for M.2 Sockets (Optional)
• 3 x Standos for M.2 Sockets (Optional)

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X299 Taichi CLX
Chapter 1 Introduction
ank you for purchasing ASRock X299 Taichi CLX 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.
1.1 Package Contents
• ASRock X299 Taichi CLX Motherboard (ATX Form Factor)
• ASRock X299 Taichi CLX Quick Installation Guide
• ASRock X299 Taichi CLX Support CD
• 1 x ASRock SLI_HB_Bridge_2S Card (Optional)
• 1 x ASRock WiFi 2.4/5 GHz Antenna (Optional)
• 1 x ASRock Screwdriver (Optional)
• 4 x Serial ATA (SATA) Data Cables (Optional)
• 3 x Screws for M.2 Sockets (Optional)
• 3 x Standos for M.2 Sockets (Optional)
Because 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 without further notice. If you require technical support related to this mother-
board, please visit our website for specic information about the model you are using. You
may nd the latest VGA cards and CPU support list on ASRock’s website as well. ASRock
website http://www.asrock.com.

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6
1.2 Specications
Platform • ATX Form Factor
• 8 Layer PCB
• 2oz Copper PCB
CPU • Supports Intel® CoreTM X-Series Processor Family for the
LGA 2066 Socket (Cascade Lake-X, Skylake X Refresh and
Skylake X)
• Digi Power design
• 13 Power Phase design
• Supports Intel® Turbo Boost Max Technology 3.0
• Supports ASRock Hyper BCLK Engine III
Chipset • Intel® X299
Memory • Quad Channel DDR4 Memory Technology
• 8 x DDR4 DIMM Slots
• Supports DDR4 4200+(OC)*/4133(OC)/4000(OC)/3866(OC)
/3800(OC)/3733(OC)/3600(OC)/3200(OC)/2933(OC)/2800
(OC)/2666/2400/2133 non-ECC, un-buered memory
* e maximum memory frequency supported may vary by
processor type.
* Please refer to Memory Support List on ASRock’s website for
more information. (http://www.asrock.com/)
• Max. capacity of system memory: 256GB
• Supports Intel® Extreme Memory Prole (XMP) 2.0
• 15μ Gold Contact in DIMM Slots
Expansion
Slot
• 4 x PCI Express 3.0 x16 Slots*
* If you install CPU with 48 lanes, PCIE1/PCIE2/PCIE3/PCIE5
will run at x16/x8/x16/x8.
If a M.2 PCI Express module is installed on M2_1 or M2_2,
PCIE2 will downgrade to x4 mode.
If M.2 PCI Express modules are installed on M2_1 and M2_2,
PCIE2 will be disabled.
* If you install CPU with 44 lanes, PCIE1/PCIE2/PCIE3/PCIE5
will run at x16/x4/x16/x8.
If a M.2 PCI Express module is installed on M2_1, PCIE2 will
be disabled.

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X299 Taichi CLX
* If you install CPU with 28 lanes, PCIE1/PCIE2/PCIE3/PCIE5
will run at x16/x4/x8/x0.
If a M.2 PCI Express module is installed on M2_1, PCIE2 will
be disabled.
* Supports NVMe SSD as boot disks
• 1 x PCI Express 3.0 x1 Slot
• Supports AMD 3-Way CrossFireXTM and CrossFireXTM **
• Supports NVIDIA® 3-Way SLITM and SLITM**
** 3-Way CrossFireXTM and 3-Way SLITM are only supported
with CPU with 48 lanes or 44 lanes.
• 1 x Vertical M.2 Socket (Key E) with the bundled WiFi-
802.11ax module (on the rear I/O)
• 15μ Gold Contact in VGA PCIe Slot (PCIE1 and PCIE3)
Audio • 7.1 CH HD Audio with Content Protection (Realtek
ALC1220 Audio Codec)
• Premium Blu-ray Audio support
• Supports Surge Protection (ASRock Full Spike Protection)
• 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 Rear Out port
- Individual PCB Layers for R/L Audio Channel
- Gold Audio Jacks
- 15μ Gold Audio Connector
• Supports DTS Connect

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LAN 1 x 2.5 Gigabit LAN 10/100/1000/2500 Mb/s (Dragon
RTL8125AG):
• Supports Dragon 2.5G LAN Soware
- Smart Auto Adjust Bandwidth Control
- Visual User Friendly UI
- Visual Network Usage Statistics
- Optimized Default Setting for Game, Browser, and
Streaming Modes
- User Customized Priority Control
• Supports Wake-On-LAN
• Supports Lightning/ESD Protection
• Supports Energy Ecient Ethernet 802.3az
• Supports PXE
1 x Intel Gigabit LAN 10/100/1000 Mb/s (1 x Intel® I219V):
• Supports Wake-On-LAN
• Supports Lightning/ESD Protection
• Supports Energy Ecient Ethernet 802.3az
• Supports PXE
Wireless
LAN
• Intel® 802.11ax WiFi Module
• Supports IEEE 802.11a/b/g/n/ax
• Supports Dual-Band (2.4/5 GHz)
• Supports high speed wireless connections up to 2.4Gbps
• 2 antennas to support 2 (Transmit) x 2 (Receive) diversity
technology
• Supports Bluetooth 5.0 + High speed class II
• Supports MU-MIMO
Rear Panel
I/O
• 2 x Antenna Ports
• 1 x Optical SPDIF Out Port
• 2 x USB 2.0 Ports (Supports ESD Protection)
• 1 x USB 3.2 Gen2x2 Type-C Port (20 Gb/s)
(ASMedia ASM3242) (Supports ESD Protection)
* Ultra USB Power is supported on USB3_3_4 ports.
* ACPI wake-up function is not supported on USB3_3_4 ports.
• 4 x USB 3.2 Gen1 Ports (Supports ESD Protection)
• 2 x RJ-45 LAN Ports with LED (ACT/LINK LED and SPEED
LED)

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X299 Taichi CLX
• 1 x Clear CMOS Button
• HD Audio Jacks: Rear Speaker / Central / Bass / Line in /
Front Speaker / Microphone (Gold Audio Jacks)
Storage • 8 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0,
RAID 1, RAID 5, RAID 10, Intel Rapid Storage Technology
17 and Intel Smart Response Technology), NCQ, AHCI and
Hot Plug*
* If M2_3 is occupied by a SATA-type M.2 device, SATA3_7
will be disabled.
• 2 x SATA3 6.0 Gb/s Connectors by ASMedia ASM1061,
support NCQ, AHCI and Hot Plug
• 2 x Ultra M.2 Sockets (M2_1 and M2_2), support M Key
type 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 type
2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2
PCI Express module up to Gen3 x4 (32 Gb/s)**
** M2_2 is only supported with CPU with 48 lanes.
** Supports Intel® OptaneTM Technolog y
** Supports PCIe RAID
** Supports NVMe SSD as boot disks
Connector • 1 x Virtual RAID On CPU Header
• 1 x SPI TPM Header
• 1 x Power LED and Speaker Header
• 2 x RGB LED Headers
* Supports in total up to 12V/3A, 36W LED Strip
• 2 x Addressable LED Headers
* Support in total up to 5V/3A, 15W LED Strip
• 1 x CPU Fan Connector (4-pin)
* e CPU Fan Connector supports the CPU fan of maximum
1A (12W) fan power.
• 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan
Speed Control)
* e CPU/Water Pump Fan supports the water cooler fan of
maximum 2A (24W) fan power.
• 5 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan
Speed Control)

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* e Chassis/Water Pump Fan supports the water cooler fan of
maximum 2A (24W) fan power.
* CPU_FAN2/WP, CHA_FAN1~5/WP can auto detect if 3-pin
or 4-pin fan is in use.
• 1 x 24 pin ATX Power Connector (Hi-Density Power
Connector)
• 2 x 8 pin 12V Power Connectors (Hi-Density Power
Connector)
• 1 x Front Panel Audio Connector (15μ Gold Audio
Connector)
• 1 x underbolt AIC Connector (5-pin)
* e underbolt™ AIC card can be installed in the enabled
PCIe slot (depending on CPU type).
• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports
ESD Protection)
• 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)
(Supports ESD Protection)
• 1 x Front Panel Type C USB 3.2 Gen2 Header (ASMedia
ASM3142)
• 1 x Dr. Debug with LED
• 1 x Power Button with LED
• 1 x Reset Button
BIOS
Feature
• 2 x AMI UEFI Legal BIOS with multilingual GUI support
(1 x Main BIOS and 1 x Backup BIOS)
• Supports Secure Backup UEFI Technology
• ACPI 6.1 Compliant wake up events
• SMBIOS 3.0 Support
• CPU, DRAM, VPPM, VTTM, PCH 1.0V, VCCMPHY, VC-
CIO, VCCSA, CPUPLL, CLK VDD Voltage Multi-adjust-
ment
Hardware
Monitor
• Temperature Sensing: CPU, CPU/Water Pump, Chassis/
Water Pump Fans
• Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water
Pump Fans
• Quiet Fan (Auto adjust chassis fan speed by CPU tempera-
ture): CPU, CPU/Water Pump, Chassis/Water Pump Fans
• Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/
Water Pump Fans

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11
X299 Taichi CLX
Please realize that there is a certain risk involved with overclocking, including adjusting
the setting in the BIOS, applying Untied Overclocking Technology, or using third-party
overclocking tools. Overclocking may aect your system’s stability, or even cause damage to
the components and devices of your system. It should be done at your own risk and expense.
We are not responsible for possible damage caused by overclocking.
* For detailed product information, please visit our website: http://www.asrock.com
• Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, DRAM,
PCH 1.0V, VCCIO, VCCSA
OS • Microso® Windows® 10 64-bit
Certica-
tions
• FCC, CE
• ErP/EuP ready (ErP/EuP ready power supply is required)

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1.3 WiFi-802.11ax Module and ASRock WiFi 2.4/5 GHz
Antenna
WiFi-802.11ax + BT Module
is motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ax + BT v5.0
module (pre-installed on the rear I/O panel) that oers support for WiFi 802.11 a/b/
g/n/ax connectivity standards and Bluetooth v5.0. WiFi + BT module is an easy-to-
use wireless local area network (WLAN) adapter to support WiFi + BT. Bluetooth
v5.0 standard features Smart Ready technology that adds a whole new class of
functionality into the mobile devices. BT 5.0 also includes Low Energy Technology
and ensures extraordinary low power consumption for PCs. e 2T2R WiFi
solution sets a WiFi high speed standard and oers max link rate up to 2.4Gbps.
* e transmission speed may vary according to the environment.
ASRock WiFi 2.4/5 GHz Antenna

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13
X299 Taichi CLX
1.4 USB 3.2 Gen2 x2 Module
Specications
Platform • Size: 1.45-in x 1.65-in, 3.7 cm x 4.2 cm
Controller • ASMedia ASM3242 Controller
M.2
• Proprietary design for Asrock specic motherboard
* Please note that plugging into other M.2 connector may
damage the motherboard and this module
Connector
• 1 x USB 3.2 Gen2x2 Type-C Port (Supports ESD Protection
(ASRock Full Spike Protection))
*For charging Type-A USB devices, we suggest using the Type-A
connectors on your motherboard.
*is port supports power outputs up to 5V/3A. For charging Type-C
USB devices, the device should support Type-C standards
to adjust the current because it will be dierent in Power On state (3
Amp) and Sleep state (1 Amp).
*Some Type-C USB devices may only be charged by its own adapter.
OS • Microso® Windows® 10 64-bit
USB 3.2 Gen2x2
Type-C Port
TBT_M2_1

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is is an 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.
Chapter 2 Installation

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15
X299 Taichi CLX
2.1 Installing the CPU
CAUTION:
Please note that X299 platform is only compatible with the LGA 2066 socket, which is
incompatible with the LGA 2011-3 socket (for X99 platform).
1. Before you insert the 2066-Pin CPU into the socket, please check if the PnP cap is on the
socket, if the CPU surface is unclean, or if there are any bent pins in the socket. Do not
force to insert the CPU into the socket if above situation is found. Otherwise, the CPU
will be seriously damaged.
2. Unplug all power cables before installing the CPU.
A
B
A
B
1
2

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16
4
A
3
B
5

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17
X299 Taichi CLX
Please save and replace the cover if the processor is removed. e cover must be placed if
you wish to return the motherboard for aer service.
6
A
B
8
B
7
A

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2.2 Installing the CPU Fan and Heatsink
CPU_FAN
1 2