ASROCK X370 KILLER SLI/AC User manual

Version 1.0
Published January 2017
Copyright©2017 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)
e terms HDMI™ and HDMI High-Denition Multimedia Interface, and the HDMI
logo are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.

Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 7
1.4 I/O Panel 9
1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz
Antenna (for X370 Killer SLI/ac only) 11
Chapter 2 Installation 13
2.1 Installing the CPU 14
2.2 Installing the CPU Fan and Heatsink 16
2.3 Installing Memory Modules (DIMM) 25
2.4 Expansion Slots (PCI Express Slots) 27
2.5 Jumpers Setup 28
2.6 Onboard Headers and Connectors 29
2.7 SLITM and Quad SLITM Operation Guide 34
2.7.1 Installing Two SLITM-Ready Graphics Cards 34
2.7.2 Driver Installation and Setup 36
2.8 CrossFireXTM and Quad CrossFireXTM Operation Guide 37
2.8.1 Installing Two CrossFireXTM-Ready Graphics Cards 37
2.8.2 Driver Installation and Setup 39
2.9 M.2_SSD (NGFF) Module Installation Guide 40
Chapter 3 Software and Utilities Operation 44
3.1 Installing Drivers 44

3.2 A-Tuning 45
3.2.1 Installing A-Tuning 45
3.2.2 Using A-Tuning 45
3.3 ASRock Live Update & APP Shop 48
3.3.1 UI Overview 48
3.3.2 Apps 49
3.3.3 BIOS & Drivers 52
3.3.4 Setting 53
3.4 ASRock RGB LED 54
Chapter 4 UEFI SETUP UTILITY 56
4.1 Introduction 56
4.1.1 UEFI Menu Bar 56
4.1.2 Navigation Keys 57
4.2 Main Screen 58
4.3 OC Tweaker Screen 59
4.4 Advanced Screen 60
4.4.1 CPU Conguration 61
4.4.2 North Bridge Conguration 62
4.4.3 South Bridge Conguration 63
4.4.4 Storage Conguration 64
4.4.5 Super IO Conguration 65
4.4.6 ACPI Conguration 66
4.4.7 USB Conguration 67
4.4.8 Trusted Computing 68

4.5 Tools 69
4.6 Hardware Health Event Monitoring Screen 71
4.7 Security Screen 73
4.8 Boot Screen 74
4.9 Exit Screen 76

English
1
X370 Killer SLI/ac / X370 Killer SLI
Chapter 1 Introduction
ank you for purchasing ASRock X370 Killer SLI/ac / X370 Killer SLI
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.
1.1 Package Contents
• ASRock X370 Killer SLI/ac / X370 Killer SLI Motherboard (ATX Form Factor)
• ASRock X370 Killer SLI/ac / X370 Killer SLI Quick Installation Guide
• ASRock X370 Killer SLI/ac / X370 Killer SLI Support CD
• 1 x I/O Panel Shield
• 2 x Serial ATA (SATA) Data Cables (Optional)
• 1 x ASRock SLI_HB_Bridge_2S Card (Optional)
• 3 x Screws for M.2 Socket (Optional) (for X370 Killer SLI only)
• 2 x Screws for M.2 Socket (Optional) (for X370 Killer SLI/ac only)
• 2 x ASRock WiFi 2.4/5 GHz Antennas (Optional) (for X370 Killer SLI/ac only)y)
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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2
1.2 Specications
Platform • ATX Form Factor
CPU • Supports AMD Socket AM4 A-Series APUs (Bristol Ridge)
and Ryzen CPUs (Summit Ridge)
• IR Digital PWM
• 12 Power Phase design
• Supports 95W Water Cooling
Chipset • AMD Promontory X370
Memory • Dual Channel DDR4 Memory Technology
• 4 x DDR4 DIMM Slots
• AMD Ryzen series CPUs support DDR4 2933+(OC)/
2667/2400/2133 ECC & non-ECC, un-buered memory*
• AMD 7th Gen A-Series APUs support DDR4 2133 ECC &
non-ECC, un-buered memory*
* Please refer to Memory Support List on ASRock’s website for
more information. (http://www.asrock.com/)
* Please refer to page 25 for DDR4 UDIMM maximum
frequency support.
• Max. capacity of system memory: 64GB
• 15μ Gold Contact in DIMM Slots
Expansion
Slot
AMD Ryzen series CPUs
• 2 x PCI Express 3.0 x16 Slots (single at x16 (PCIE2); dual at
x8 (PCIE2) / x8 (PCIE4))*
AMD 7th A-Series APUs
• 1 x PCI Express 3.0 x16 Slot (single at x8 (PCIE2))*
* Supports NVMe SSD as boot disks
• 4 x PCI Express 2.0 x1 Slots
• Supports AMD Quad CrossFireXTM and CrossFireXTM
• Supports NVIDIA® Quad SLITM and SLITM
• 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module
• 15μ Gold Contact in VGA PCIe Slot (PCIE2)

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X370 Killer SLI/ac / X370 Killer SLI
Graphics • Integrated AMD RadeonTM R7/R5 Series Graphics in A-series
APU
• DirectX 12, Pixel Shader 5.0
• Max. shared memory 2GB
• Supports HDMI with max. resolution up to 4K x 2K
(4096x2160) @ 24Hz / (3840x2160) @ 30Hz
• Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and
HBR (High Bit Rate Audio) with HDMI Port (Compliant
HDMI monitor is required)
• Supports HDCP with HDMI Port
• Supports Full HD 1080p Blu-ray (BD) playback with HDMI
Port
Audio • 7.1 CH HD Audio with Content Protection (Realtek ALC892
Audio Codec)
• Premium Blu-ray Audio support
• Supports Surge Protection
• Nichicon Fine Gold Series Audio Caps
• PCB Isolate Shielding
• Individual PCB Layers for R/L Audio Channel
LAN • Gigabit LAN 10/100/1000 Mb/s
• GigaLAN Intel® I211AT
• Supports Wake-On-LAN
• Supports Lightning/ESD Protection
• Supports Energy Ecient Ethernet 802.3az
• Supports PXE
Wireless
LAN (for
X370 Killer
SLI/ac
only)
• 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
Rear Panel
I/O
• 2 x Antenna Ports
• 1 x PS/2 Mouse Port
• 1 x PS/2 Keyboard Port

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4
• 1 x HDMI Port
• 1 x Optical SPDIF Out Port
• 1 x USB 3.0 Type-A Port (10 Gb/s) (Supports ESD Protection)
• 1 x USB 3.0 Type-C Port (10 Gb/s) (Supports ESD Protection)
• 6 x USB 3.0 Ports (Supports ESD Protection)
• 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
LED)
• HD Audio Jacks: Rear Speaker / Central / Bass / Line in /
Front Speaker / Microphone (Gold Audio Jacks)
Storage • 6 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 type
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) (with Ryzen
CPU) or Gen3 x2 (16 Gb/s) (with A-Series APU)*
• 1 x M.2 Socket (M2_2), supports type 2230/2242/2260/2280
M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module
up to Gen2 x2 (10 Gb/s)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
Connector • 1 x COM Port Header
• 1 x TPM Header
• 1 x Power LED and Speaker Header
• 1 x AMD Fan LED Header
• 2 x RGB LED Headers
* Supports up to 12V/3A, 36W 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 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)

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X370 Killer SLI/ac / X370 Killer SLI
• 1 x Chassis Optional/Water Pump Fan Connector (4-pin)
(Smart Fan Speed Control)
* e Chassis Optional/Water Pump Fan supports the water
cooler fan of maximum 1.5A (18W) fan power.
* CHA_FAN2 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
Connector)
• 1 x Front Panel Audio Connector
• 1 x AMD LED Fan USB Header
• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports
ESD Protection)
• 2 x USB 3.0 Headers (Support 4 USB 3.0 ports) (Supports
ESD Protection)
BIOS
Feature
• AMI UEFI Legal BIOS with multilingual 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
Hardware
Monitor
• 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 tempera-
ture): CPU, CPU Optional/Water Pump, Chassis, Chassis
Optional/Water Pump Fans
• 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
OS • Microso® Windows® 10 64-bit
* For the updated Windows® 10 driver, please visit ASRock’s
website for details: http://www.asrock.com

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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
Certica-
tions
• FCC, CE, WHQL
• ErP/EuP ready (ErP/EuP ready power supply is required)

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X370 Killer SLI/ac / X370 Killer SLI
DDR4_A2 (6 4 bit, 288-pin module)
DDR4_A1 (6 4 bit, 288-pin module)
DDR4_B2 (6 4 bit, 288-pin module)
DDR4_B1 (6 4 bit, 288-pin module)
ATXPWR1
PCIE2
Top:
Central/Bass
Center:
REAR SPK
Top:
LIN E IN
Center:
FRONT
Bottom:
Optical
SPDIF
Bottom:
MIC I N
PCIE4
HDLED RESET
PLED PWRBTN
PANEL1
1
1
SPK_PLED1
COM1
1
1
HD_AUDIO1
SATA3_3_4
SATA3_1_2
PCIE1
6
12
13
14
USB_1_2
1
21 19
USB_3_4
1
22
2526
SATA3_5_6
15 4
24 15
CMOS
Battery
M2_1
M2_2
USB3_7_8
1
23
CPU_FAN1
7
8
9
10
11
1
TPMS1
Ul t r a M.2
PC Ie G e n3 x 4
CHA_FAN1
3
2
USB3_9_10
1
AMD_FAN_LED1
1
CLRMOS1
1
LAN
AUDIO
CODEC
BIOS
ROM
RoHS
PCIE5
CHA_FAN2
16
1
USB_5
RGB_LED1
1
Supe r
I/O
PCIE6
PCIE3
CPU_OPT/W_PUMP
M2_3
NUT1
CHA_FAN3/W_PUMP
20
Top:
RJ-45
USB 3.0
T: USB5
B: USB6
USB 3.0
T: USB3_TA_1
B: USB3_TC_1
PS2
Keyboard
PS2
Mous e
USB 3.0
T: USB1
B: USB2
USB 3.0
T: USB3
B: USB4
18 17
RGB_LED2
1
AMD
Promontory
X370
SOCKETAM4
HDMI1
1.3 Motherboard Layout

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No. Description
1 ATX 12V Power Connector (ATX12V1)
2 CPU Fan Connector (CPU_FAN1)
3 CPU Fan / Waterpump Fan Connector (CPU_OPT/W_PUMP)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
5 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
6 ATX Power Connector (ATXPWR1)
7 USB 3.0 Header (USB3_9_10)
8 USB 3.0 Header (USB3_7_8)
9 AMD LED Fan USB Header (USB_5)
10 AMD Fan LED Header (AMD_FAN_LED1)
11 Chassis Fan Connector (CHA_FAN1)
12 SATA3 Connectors (SATA3_5_6)
13 SATA3 Connectors (SATA3_3_4)
14 SATA3 Connectors (SATA3_1_2)
15 System Panel Header (PANEL1)
16 RGB LED Header (RGB_LED1)
17 RGB LED Header (RGB_LED2)
18 Clear CMOS Jumper (CLRMOS1)
19 Chassis Fan / Waterpump Fan Connector (CHA_FAN3/W_PUMP)
20 Chassis Fan Connector (CHA_FAN2)
21 USB 2.0 Header (USB_1_2)
22 USB 2.0 Header (USB_3_4)
23 Power LED and Speaker Header (SPK_PLED1)
24 TPM Header (TPMS1)
25 COM Port Header (COM1)
26 Front Panel Audio Header (HD_AUDIO1)

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X370 Killer SLI/ac / X370 Killer SLI
1.4 I/O Panel
No. Description No. Description
1 PS/2 Mouse Port 9 USB 3.0 Ports (USB3_5_6)
2 LAN RJ-45 Port* 10 USB 3.0 Type-A Port (USB3_TA_1)
3 Central / Bass (Orange) 11 USB 3.0 Type-C Port (USB3_TC_1)
4 Rear Speaker (Black) 12 USB 3.0 Ports (USB3_3_4)
5 Line In (Light Blue) 13 USB 3.0 Ports (USB3_1_2)
6 Front Speaker (Lime)** 14 HDMI Port (HDMI1)
7Microphone (Pink) 15 PS/2 Keyboard Port
8 Optical SPDIF Out Port 16 Antenna Ports
* 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 Orange 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection
ACT/LINK LED
SPEED LED
LAN Port
7810
11
9
4
3
6
5
2
13 12
1
15 1416

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** 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
To enable Multi-Streaming, you need to connect a front panel audio cable to the front
panel audio header. Aer restarting your computer, you will nd the “Mixer” tool on your
system. Please select “Mixer ToolBox” , click “Enable playback multi-streaming”, and
click “ok”. Choose “2CH”, “4CH”, “6CH”, or “8CH” and then you are allowed to select
“Realtek HDA Primary output” to use the Rear Speaker, Central/Bass, and Front Speaker,
or select “Realtek HDA Audio 2nd output” to use the front panel audio.

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X370 Killer SLI/ac / X370 Killer SLI
1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz
Antenna (for X370 Killer SLI/ac only)
WiFi-802.11ac + BT Module
is motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ac + BT v4.0
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 v4.0. WiFi + BT module is an easy-to-
use wireless local area network (WLAN) adapter to support WiFi + BT. Bluetooth
v4.0 standard features Smart Ready technology that adds a whole new class of
functionality into the mobile devices. BT 4.0 also includes Low Energy Technology
and ensures extraordinary low power consumption for PCs.
* e transmission speed may vary according to the environment.

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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.

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X370 Killer SLI/ac / X370 Killer SLI
is is a 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.
Failure to do so may cause physical injuries to you and damages to motherboard
components.
• In order to avoid damage from static electricity to the motherboard’s components,
NEVER place your motherboard directly on a carpet. Also remember to use a grounded
wrist strap or touch a safety grounded object before you handle the components.
• Hold components by the edges and do not touch the ICs.
• Whenever you uninstall any components, place them on a grounded anti-static pad or
in the bag that comes with the components.
• When placing screws to secure the motherboard to the chassis, please do not over-
tighten the screws! Doing so may damage the motherboard.
Chapter 2 Installation

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2.1 Installing the CPU
Unplug all power cables before installing the CPU.
2
1