Asrock X370 Killer SLI Quick Installation Guide

Version 1.3
Published August 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.

Motherboard Layout

DDR4 _A2 (64 b it, 288 -pin mo dule)

DDR4 _A1 (64 b it, 288 -pin mo dule)

DDR4 _B2 (64 b it, 288 -pin mo dule)

DDR4 _B1 (64 b it, 288 -pin mo dule)

ATXP WR 1

PCIE2

Top:

Central/Bass

Center:

REAR SPK

Top:

LINE IN

Center:

FRONT

Bottom:

Optical

SPDIF

Bottom:

MIC IN

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

1

5

4

24

15

CMOS

Battery

M2_1

M2_2

USB3_7_ 8

1

23

CPU_FAN1

7

8

9

10

11

1

TPMS1

Ult ra M.2

PCIe Ge n3 x4

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

Super

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

Keybo ard

PS2

Mouse

USB 3.0
T: USB1
B: USB2

USB 3.0
T: USB3
B: USB4

18

17

RGB_LED2

1

AMD

Promontory

X370

SOCKETAM4

HDMI1

X370 Killer SLI/ac / X370 Killer SLI

English

1

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)

English

2

I/O Panel

X370 Killer SLI/ac / X370 Killer SLI

5

1

2

436

15 1416

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)

7 Microphone (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.

ACT/LINK LED

SPEED LED

LAN Por t

13 12

11

9

7810

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

English

3

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

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

Audio Output

Channels

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

Front Speaker

(No. 6)

Rear Speaker

(No. 4)

Central / Bass

(No. 3)

Line In
(No. 5)

English

4

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.

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 availabl e 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.

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

•

4 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)

•

English

5

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/)
* Please refer to page 25 for DDR4 UDIMM maximum
frequency support.

ATX Form Factor

•

Supports AMD Socket AM4 A-Series APUs (Bristol Ridge)

•

and Ryzen CPUs (Summit Ridge)
12 Power Phase design

•

Supports 95W Water Cooling

•

AMD Promontory X370

•

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 2400/2133 ECC

•

& non-ECC, un-buered memory*

Max. capacity of system memory: 64GB

•

15μ Gold Contact in DIMM Slots

•

English

6

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**

•

** is feature is only supported with Ryzen Series CPUs (Sum­mit Ridge).1 x M.2 Socket (Key E), supports type 2230 WiFi/BT
module

15μ Gold Contact in VGA PCIe Slot (PCIE2)

•

Graphics

Audio

X370 Killer SLI/ac / X370 Killer SLI

Integrated AMD RadeonTM R-Series Graphics in A-series

•

APU*

* Actual support may vary by CPU

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

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

Wireless
LAN (for
X370 Killer
SLI/ac
only)

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

•

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

•

English

7

English

Storage

Connector

6 x USB 3.0 Ports (Supports ESD Protection)

•

1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED

•

LE D)
HD Audio Jacks: Rear Speaker / Central / Bass / Line in /

•

Front Speaker / Microphone (Gold Audio Jacks)

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

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)

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.

8

BIOS
Feature

X370 Killer SLI/ac / X370 Killer SLI

* 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

•

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

•

Conn ector)
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)

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

OS

Certica­tions

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

Microso® Windows® 10 64-bit

•

* For the updated Windows® 10 driver, please visit ASRock ’s
website for details: http://www.asrock.com

FCC, CE, WHQL

•

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

•

English

9

* 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 o verclocking.

English

10

X370 Killer SLI/ac / X370 Killer SLI

1.3 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-to­use 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.

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 clock­wise 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

X370 Killer SLI/ac / X370 Killer SLI

Chapter 2 Installation

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.

13

English

2.1 Installing the CPU

Unplug all power cables be fore installing the CPU.

1

English

14

2

X370 Killer SLI/ac / X370 Killer SLI

3

15

English

2.2 Installing the CPU Fan and Heatsink

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. Make 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.

Installing the CPU Box Cooler SR1

1

English

16

2

X370 Killer SLI/ac / X370 Killer SLI

3

4

1

N

FA

_

U

P

C

English

17

Installing the AM4 Box Cooler SR2

1

2

English

18

X370 Killer SLI/ac / X370 Killer SLI

3

19

English

4

1

N

FA

_

U

P

C

5

4-pin FAN cable

English

20

RGB LED Cable

1

N

FA

CPU_

1

D

E

L

_

N

FA

_

D

AM

+12V

*e diagram shown here are for reference only. Please refer to page 33 for the orientation of
AMD Fan LED Header (AMD_FAN_LED1).

Installing the AM4 Box Cooler SR3

1

X370 Killer SLI/ac / X370 Killer SLI

2

English

21

3

4

English

22

X370 Killer SLI/ac / X370 Killer SLI

5

FAN1

CPU_

23

English

6

1

N

FA

_

U

P

C

1

D

E

L

_

N

FA

_

D

AM

+12V

or

7

1

N

FA

_

U

P

C

1

D

E

L

_

N

FA

_

D

AM

5

_

B

S

U

English

Please note that only one cable should be used at a time in this step.
If you select AMD_FAN_LED1, please install ASRock utility "ASRock RGB LED".
If you select USB connector, please install AMD utility "SR3 Settings Soware".

*e diagram shown here are for reference only. Please refer to page 33 for the orientation of AMD Fan
LED Header (AMD_FAN_LED1) and page 30 for the orientation of AMD LED Fan USB Header (USB_5).

24

X370 Killer SLI/ac / X370 Killer SLI

2.3 Installing Memory Modules (DIMM)

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

DDR4 UDIMM Maximum Frequency Support

A-Series APUs:

UDIMM Memory Slot

A1 A2 B1 B2

- SR - - 2400

- DR - - 2400

- SR - SR 2400

- DR - DR 2133

SR SR SR SR 1866

SR/DR DR SR/DR DR 1866

Frequency

(Mhz)

Ryzen CPUs:

UDIMM Memory Slot

A1 A2 B1 B2

- SR - - 2667

- DR - - 2667

- SR - SR 2667

- DR - DR 2400-2667

SR SR SR SR 2133-2400

SR/DR DR SR/DR DR 1866-2133

SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label

DR: Dual rank DIMM, 2Rx4 or 2R x8 on DIMM module label

Frequency

(Mhz)

English

25

e DIMM only ts in one correct orie ntation. It will cause permanent dam age to
the mothe rboard and the DIMM if you force the DIMM into the slot at incor rect
orientation.

1

2

English

26

3

X370 Killer SLI/ac / X370 Killer SLI

2.4 Expansion Slots (PCI Express Slots)

ere are 6 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 unplug ged. Pl ease re ad the do cumentation of the expansion card and
make necessary hardware settings for the card before you start the installation.

PCIe slots:

PCIE1 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE3 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards.
PCIE5 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.

PCIE6 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.

PCIe Slot Congurations

th

7

A-Series APUs :

PCIE2 PCIE4

Single Graphics Card x8 N /A

Ryzen series CPUs:

PCIE2 PCIE4

Single Graphics Card x16 N/A

Two Graphics Cards in

CrossFireXTM or SLITM

Mode

For a better thermal environment, please connect a chassis fan to the motherboard’s chassis
fan connector (CHA _FAN1 or CH A_FAN2) when using multiple graphics card s.

x8 x8

English

27

2.5 Jumpers Setup

e illustration shows how jumpers are setup. When the jumper cap is placed on
the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper
is “Open”. e illustration shows a 3-pin jumper whose pin1 and pin2 are “Short”

when a jumper cap is placed on these 2 pins.

Clear CMOS Jumper
(C LR MOS 1)
(see p.1, No. 18)

CLRMOS1 allows you to clear the data in CMOS. To clear and reset the system
parameters to default setup, please turn o the computer and unplug the power
cord from the power supply. Aer waiting for 15 seconds, use a jumper cap to
short pin2 and pin3 on CLRMOS1 for 5 seconds. However, please do not clear the
CMOS right aer you update the BIOS. If you need to clear the CMOS when you
just nish updating the BIOS, you must boot up the system rst, and then shut it
down before you do the clear-CMOS action. Please be noted that the password,
date, time, and user default prole will be cleared only if the CMOS battery is
removed.

Clear CMOSDefault

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