DFI CS331-C246 User manual

A52410940
CS331-C246/Q370
MicroATX Industrial Motherboard
User’s Manual

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CS331-C246/Q370
2
Copyright
This publication contains information that is protected by copyright. No part of it may be re-
produced in any form or by any means or used to make any transformation/adaptation without
the prior written permission from the copyright holders.
This publication is provided for informational purposes only. The manufacturer makes no
representations or warranties with respect to the contents or use of this manual and specifi-
cally disclaims any express or implied warranties of merchantability or fitness for any particular
purpose. The user will assume the entire risk of the use or the results of the use of this docu-
ment. Further, the manufacturer reserves the right to revise this publication and make changes
to its contents at any time, without obligation to notify any person or entity of such revisions
or changes.
Changes after the publication’s first release will be based on the product’s revision. The web-
site will always provide the most updated information.
© 2019. All Rights Reserved.
Trademarks
Product names or trademarks appearing in this manual are for identification purpose only and
are the properties of the respective owners.
FCC and DOC Statement on Class B
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reason-
able protection against harmful interference when the equipment is operated in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encour-
aged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio TV technician for help.
Notice:
1. The changes or modifications not expressly approved by the party responsible for compli-
ance could void the user’s authority to operate the equipment.
2. Shielded interface cables must be used in order to comply with the emission limits.

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Copyright............................................................................2
Trademarks.........................................................................2
FCC and DOC Statement on Class B ....................................2
Warranty ............................................................................4
Static Electricity Precautions ................................................4
Safety Measures..................................................................4
About the Package..............................................................5
Optional Items....................................................................5
Before Using the System Board ...........................................5
Chapter 1 - Introduction......................................................6
Specifications .................................................................6
Features ........................................................................7
Chapter 2 - Hardware Installation........................................9
Board Layout .................................................................9
System Memory .............................................................9
Installing the DIMM Module .....................................10
CPU.............................................................................11
Installing the CPU....................................................12
Installing the Fan and Heat Sink...............................14
Jumper Settings ...........................................................15
Clear CMOS.............................................................15
Mini PCIe/mSATA Signal Select .................................15
COM1/COM2 RS232/422/485 Select..........................16
COM1/COM2 RS232/Power Select.............................17
PS/2 Power Select ...................................................18
USB Power Select ....................................................18
Rear Panel I/O Ports.....................................................19
PS/2 Keyboad/Mouse Port ........................................19
COM (Serial) Ports ...................................................20
Graphics Interfaces..................................................21
RJ45 LAN Ports........................................................22
Audio ......................................................................22
USB Ports................................................................23
I/O Connectors ............................................................24
SATA (Serial ATA) Connectors...................................24
Digital I/O Connector...............................................24
Cooling Fan Connectors............................................25
Power Connectors....................................................25
Chassis Intrusion Connector .....................................26
Front Panel Connector .............................................26
LAN LED Connector .................................................27
S/PDIF Connector ....................................................27
SMBus Connector ....................................................28
Standby Power LED .................................................28
LPC Connector.........................................................29
Expansion Slots .......................................................30
Battery....................................................................30
Chapter 3 - BIOS Setup ....................................................31
Overview .....................................................................31
Main ............................................................................32
Advanced.....................................................................33
RC ACPI Settings .....................................................33
CPU Configuration....................................................34
Power & Performance ..............................................35
PCH-FW Configuration..............................................35
Trusted Computing ..................................................38
NCT6116D Super IO Configuration ...........................38
NCT6116D HW Monitor............................................39
Serial Port Console Redirection .................................41
USB Configuration....................................................42
CSMConfiguration ....................................................42
USB Power Control ..................................................43
Network Stack Configuration ....................................44
Chipset ........................................................................44
Security .......................................................................48
Boot ............................................................................49
Save & Exit..................................................................49
Updating the BIOS .......................................................50
Notice: BIOS SPI ROM..................................................50
Chapter 4 - RAID..............................................................51
Chapter 5 - Intel AMT Settings ..........................................53
Chapter 6 - Supported Software ........................................67
Table of Contents

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Warranty
1. Warranty does not cover damages or failures that arised from misuse of the product, in-
ability to use the product, unauthorized replacement or alteration of components and prod-
uct specifications.
2. The warranty is void if the product has been subjected to physical abuse, improper instal-
lation, modification, accidents or unauthorized repair of the product.
3. Unless otherwise instructed in this user’s manual, the user may not, under any circum-
stances, attempt to perform service, adjustments or repairs on the product, whether in or
out of warranty. It must be returned to the purchase point, factory or authorized service
agency for all such work.
4. We will not be liable for any indirect, special, incidental or consequencial damages to the
product that has been modified or altered.
Static Electricity Precautions
It is quite easy to inadvertently damage your PC, system board, components or devices even
before installing them in your system unit. Static electrical discharge can damage computer
components without causing any signs of physical damage. You must take extra care in han-
dling them to ensure against electrostatic build-up.
1. To prevent electrostatic build-up, leave the system board in its anti-static bag until you are
ready to install it.
2. Wear an antistatic wrist strap.
3. Do all preparation work on a static-free surface.
4. Hold the device only by its edges. Be careful not to touch any of the components, contacts
or connections.
5. Avoid touching the pins or contacts on all modules and connectors. Hold modules or con-
nectors by their ends.
Safety Measures
To avoid damage to the system:
• Use the correct AC input voltage range.
To reduce the risk of electric shock:
• Unplug the power cord before removing the system chassis cover for installation or servic-
ing. After installation or servicing, cover the system chassis before plugging the power
cord.
Important:
Electrostatic discharge (ESD) can damage your processor, disk drive and other
components. Perform the upgrade instruction procedures described at an ESD
workstation only. If such a station is not available, you can provide some ESD pro-
tection by wearing an antistatic wrist strap and attaching it to a metal part of the
system chassis. If a wrist strap is unavailable, establish and maintain contact with
the system chassis throughout any procedures requiring ESD protection.

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CS331-C246/Q370
5
About the Package
The package contains the following items. If any of these items are missing or damaged,
please contact your dealer or sales representative for assistance.
• One CS331-C246/Q370 motherboard
• One COM port cable (With Bracket, Length: 300mm, 2 x COM ports)
• One Serial ATA data cable (With LOCK, Length: 500mm)
• One I/O shield
• One DVD
The board and accessories in the package may not come similar to the information listed
above. This may differ in accordance to the sales region or models in which it was sold. For
more information about the standard package in your region, please contact your dealer or
sales representative.
Optional Items
• USB 2.0 port cable (Length: 350/398mm)
• USB 3.1 Gen 2 port cable (Length: TBD)
• COM port cable (Length: 300mm, 2 x COM ports)
• Serial ATA data cable (Length: 500mm, With LOCK)
• Thermal solution (For 35W, Height: 37.3mm)
• Thermal solution (For 65W, Height: 72.8mm)
• Thermal solution (For 95W, Height: TBD)
• LPC EXT-RS232 module (4 x RS232 ports)
• LPC EXT-RS485 module (4 x RS485 ports)
The board and accessories in the package may not come similar to the information listed
above. This may differ in accordance to the sales region or models in which it was sold. For
more information about the standard package in your region, please contact your dealer or
sales representative.
Before Using the System Board
Before using the system board, prepare basic system components.
If you are installing the system board in a new system, you will need at least the following
internal components.
• A CPU
• Memory module
• Storage devices such as hard disk drive, etc.
You will also need external system peripherals you intend to use which will normally include at
least a keyboard, a mouse and a video display monitor.

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CS331-C246/Q370
Chapter 1 - Introduction
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Chapter 1 - Introduction
►Specifications
SYSTEM Processor CS331-C246:
Intel
®
Xeon
®
E-2176G/2124G Processors, LGA 1151 Socket, TDP up to 80W
8th Generation Intel
®
Core
TM
/Pentium
®
/Celeron
®
Processors, LGA 1151 Socket,
TDP up to 95W
CS331-Q370:
8th Generation Intel®CoreTM/Pentium®/Celeron®Processors, LGA 1151
Socket, TDP up to 95W
Chipset CS331-C246: Intel®C246 Chipset
CS331-Q370: Intel®Q370 Chipset
Memory CS331-C246:
Four 288-pin DIMM up to 64GB
Dual Channel DDR4 2400/2666 MHz (ECC/non ECC support)
CS331-Q370:
Four 288-pin DIMM up to 64GB
Dual Channel DDR4 2400/2666 MHz (non ECC support)
BIOS AMI SPI 128Mbit
GRAPHICS Controller Intel®HD Gen 9 Graphics
Feature OpenGL 5.0, DirectX 12, OpenCL 2.1
HW Decode: AVC/H.264, MPEG2, VC1/WMV9, JPEG/MJPEG, HEVC/H265, VP8,
VP9
HW Encode: MPEG2, AVC/H264, JPEG, HEVC/H265, VP8, VP9
Display 1 x HDMI
1 x DVI-I (DVI-D signal)
1 x DP++
HDMI 1.2: resolution up to 1920x1200 @ 60Hz
HDMI 2.0a: resolution up to 4096x2160 @ 60Hz (opt., MOQ required)
DVI-D: resolution up to 1920x1200 @ 60Hz
DP++: resolution up to 4096x2106 @ 60Hz
Triple
Displays
HDMI + DVI-D + DP++
EXPANSION Interface 2 x PCIe x16 (Gen 3) (1 x16 signals or 2 x8 signals)
2 x PCIe x4 (Gen 3)
1 x mini PCIe (PCIe/mSATA/USB2.0)
1 x M.2 2242/2260/2280 M key (PCIe Gen3 x 4 NVMe)
AUDIO
Audio Codec
Realtek ALC888
ETHERNET Controller CS331-C246:
1 x Intel®I211AT PCIe (10/100/1000Mbps)
1 x Intel®I219LM PCIe (10/100/1000Mbps) with iAMT 12.0 (only Xeon, Core
i7/i5 support iAMT)
CS331-Q370:
1 x Intel®I211AT PCIe (10/100/1000Mbps)
1 x Intel®I219LM PCIe (10/100/1000Mbps) with iAMT 12.0 (only Core i7/i5
supports iAMT)
REAR I/O Ethernet 2 x GbE (RJ-45)
USB 2 x USB 3.1 Gen 2
2 x USB 3.1 Gen 1
2 x USB 2.0
REAR I/O Serial 1 x RS-232/422/485 (RS-232 with power) (DB-9)
PS/2 1 x PS/2 (mini-DIN-6)
Display 1 x HDMI
1 x DVI-I (DVI-D signal)
1 x DP++
Audio 1 x Line-out
1 x Line-in (colay, opt., MOQ required)
1 x Mic-in
INTERNAL I/O Serial 1 x RS-232/422/485 (RS-232 with power) (2.54mm pitch)
2 x RS-232 (2.54mm pitch)
USB 2 x USB 3.1 Gen 2
4 x USB 2.0 (2.54mm pitch) (1 x USB 2.0 colay vertical Type A) (opt.,
MOQ required)
Audio 1 x S/PDIF
1 x Front Audio Header
SATA CS331-C246:
6 x SATA 3.0 (up to 6Gb/s)
RAID 0/1/5/10
CS331-Q370:
5 x SATA 3.0 (up to 6Gb/s)
RAID 0/1/5/10
DIO 1 x 8-bit DIO
LPC 1 x LPC (supports LPC EXT-RS-232/485 module)
SMBus 1 x SMBus
WATCHDOG
TIMER Output &
Interval
System Reset, Programmable via Software from 1 to 255
sec/min
SECURITY TPM Infineon TPM 1.2/2.0 (opt., MOQ required)
POWER Type ATX
Connector 8-pin ATX 12V power
24-pin ATX power
RTC Battery CR2032 Coin Cell
OS SUPPORT Windows 10 IoT Enterprise 64-bit
ENVIRONMENT Temperature Operating: 0 to 60°C
Storage: -30 to 60°C with RTC Battery; -40 to 85°C with-
out RTC Battery
Humidity Operating: 5 to 90% RH
Storage: 5 to 90% RH
MECHANICAL Dimensions microATX Form Factor
244mm (9.6") x 244mm (9.6")

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Chapter 1 - Introduction
7
►Features
Watchdog Timer
The Watchdog Timer function allows your application to regularly “clear” the system at the set
time interval. If the system hangs or fails to function, it will reset at the set time interval so
that your system will continue to operate.
DDR4
DDR4 delivers increased system bandwidth and improves performance at a lower power than
DDR3/DDR2.
Graphics
The integrated Intel®HD graphics engine delivers an excellent blend of graphics performance
and features to meet business needs. It provides excellent video and 3D graphics with out-
standing graphics responsiveness. These enhancements deliver the performance and compat-
ibility needed for today’s and tomorrow’s business applications. Supports 1 x HDMI, 1 x DVI-I
(DVI-D signal) and 1 x DP++ interfaces for triple display outputs.
PCI Express
PCI Express is a high bandwidth I/O infrastructure that possesses the ability to scale speeds
by forming multiple lanes. The PCI Express architecture also supports high performance graph-
ics infrastructure by enhancing the capability of a PCIe x16 Gen 3 at 16GB/s bandwidth.
Serial ATA
Serial ATA is a storage interface that is compliant with SATA 1.0a specification. With speed of
up to 6Gb/s (SATA 3.0), it improves hard drive performance faster than the standard parallel
ATA whose data transfer rate is 100MB/s.
Gigabit LAN
Intel®I211AT PCIe and Intel®I219LM PCIe with iAMT12.0 (only Xeon, Core i7/i5 supports
iAMT) Gigabit LAN controllers support up to 1Gbps data transmission.
Audio
The Realtek ALC888S-VD2-GR audio codec provides 5.1-channel High Definition audio output.
Wake-On-USB
This function allows you to use a USB keyboard or USB mouse to wake up a system from the
S3 (STR - Suspend To RAM) state.
RTC Timer
The RTC installed on the system board allows your system to automatically power-on on the
set date and time.
ACPI STR
The system board is designed to meet the ACPI (Advanced Configuration and Power Interface)
specification. ACPI has energy saving features that enables PCs to implement Power Manage-
ment and Plug-and-Play with operating systems that support OS Direct Power Management.
ACPI when enabled in the Power Management Setup will allow you to use the Suspend to RAM
function.
With the Suspend to RAM function enabled, you can power-off the system at once by pressing
the power button or selecting “Standby” when you shut down Windows®without having to go
through the sometimes tiresome process of closing files, applications and operating system.
This is because the system is capable of storing all programs and data files during the entire
operating session into RAM (Random Access Memory) when it powers-off. The operating ses-
sion will resume exactly where you left off the next time you power-on the system.
Wake-On-LAN
This feature allows the network to remotely wake up a Soft Power Down (Soft-Off) PC. It is
supported via the onboard LAN port or via a PCI LAN card that uses the PCI PME (Power Man-
agement Event) signal. However, if your system is in the Suspend mode, you can power-on
the system only through an IRQ or DMA interrupt.
Important:
The 5V_standby power source of your power supply must support ≥720mA.
Important:
The 5V_standby power source of your power supply must support ≥720mA.
Important:
If you are using the Wake-On-USB Keyboard/Mouse function for 2 USB ports, the
5V_standby power source of your power supply must support ≥1.5A. For 3 or
more USB ports, the 5V_standby power source of your power supply must support
≥2A.

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Chapter 1 - Introduction
8
Power Failure Recovery
When power returns after an AC power failure, you may choose to either power-on the system
manually or let the system power-on automatically.
USB
The system board supports the new USB 3.1 Gen 2. It is capable of running at a maximum
transmission speed of up to 10 Gbit/s (1.2 GB/s) and is faster than USB 3.1 Gen 1 (5 Gbit/s,
or 625 MB/s), USB 2.0 (480 Mbit/s, or 60 MB/s) and USB 1.1 (12Mb/s). USB 3.1 reduces the
time required for data transmission, reduces power consumption, and is backward compatible
with USB 2.0. It is a marked improvement in device transfer speeds between your computer
and a wide range of simultaneously accessible external Plug and Play peripherals.

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CS331-C246/Q370
Chapter 2 - Hardware Installation
9
Chapter 2 - Hardware Installation
►Board Layout
2
2
G2
I C
Battery
►System Memory
DDR4_3
2
2
G2
M.2 M Key
PCIe 4 (PCIe x4)
Standby
Power
LED
ATX Power
1
12 24
13
2 1
13
14
LPC
TPM
(optional)
Chassis
Intrusion
1
System Fan 1
1
1 2
11
Front Panel
1 2
LAN LED
78
1
5
2
SMBus
SPI
Flash
BIOS
PCIe 2 (PCIe x16)
Intel I211AT
1
Clear CMOS (JP5)
C246/Q370
Intel
PCIe 3 (PCIe x4)
DDR4_1 DDR4_3
DDR4_4DDR4_2
PCIe 1 (PCIe x16)
CPU Fan
1
+12V
Power
4
3
Mini PCIe
Nuvoton
NCT6116D
1
USB 2.0
1
DIO
19
2
1
1
S/PDIF
Realtek
ALC888S
Front
Audio
21
910
I C
PS/2 KB/MS
USB 5-6
USB 2.0
COM 1
HDMI
Line-in (opt.)
Line-out
Mic-in
LAN 1
USB 1-2
USB 3.1 Gen 1
USB 9-10
or Optional
Vertical USB 9
210
1
9
1
9
19
COM 2
2
COM 3
2
COM 4
2
1
1
1
SATA 2
SATA 1
SATA 0
SATA 3.0
COM 2
RS232/Power
Select (JP7)
SATA 6
(CS331-C246 only)
SATA 5
SATA 3.0
1
Battery
Battery
Intel I219LM
Buzzer
6
51
COM 1
RS232/422/485
Select (JP2)
2
COM 1 RS232/Power
Select (JP4)
COM 1 RS232/422/485
Select (JP3)
6
5
2
1
6
5
2
1
6
5
2
1
6
5
2
1
(JP10)(JP6)(JP8)
COM 2
RS232/422/485
Select
4
8
1
5
System
Fan 2
SATA 3
COM 1
RS232/422/485
Select (JP1)
1
USB 3.1 1-2
Power Select (JP15)
USB 3.1 3-4 Power Select (JP16)
1
Mini PCIe/mSATA Signal Select
(JP9)
USB 2.0 7-8
Power Select
(JP17)
1
USB 2.0 9-10 Power Select (JP18)
1
11
USB 2.0 5-6 Power Select (JP21)
(JP20)
(JP21)
PS/2 Power Select (JP20)
1 10
1120
USB 5-6
1USB 3.1 5-6
Power Select (JP19)
USB 3.1 Gen 2
1
11
10 2
1
1
System
Fan 3
62 62
51 51
62
51
USB 7-8
DVI-I
(DVI-D signal)
DP++
LAN 2
USB 3-4
USB 3.1 Gen 2
LGA 1151 Socket
Standby Power
LED
DDR4_1
DDR4_2
DDR4_4
Important:
Electrostatic discharge (ESD) can damage your board, pro-
cessor, disk drives, add-in boards, and other components.
Perform installation procedures at an ESD workstation
only. If such a station is not available, you can provide
some ESD protection by wearing an antistatic wrist strap
and attaching it to a metal part of the system chassis. If
a wrist strap is unavailable, establish and maintain contact
with the system chassis throughout any procedures requir-
ing ESD protection.
Important:
When the Standby Power LED lit red, it indicates that
there is power on the system board. Power-off the PC
then unplug the power cord prior to installing any devices.
Failure to do so will cause severe damage to the mother-
board and components.

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CS331-C246/Q370
Chapter 2 - Hardware Installation
10
Features
• Four 288-pin DIMM up to 64GB
• The four DIMM sockets are divided into 2 channels:
Channel A - DDR4_1 and DDR4_2
Channel B - DDR4_3 and DDR4_4
• Dual Channel DDR4 2400/2666 MHz
The system board supports the following memory interface.
Single Channel (SC)
Data will be accessed in chunks of 64 bits from the memory channels.
Dual Channel (DC)
Data will be accessed in chunks of 128 bits from the memory channels. Dual channel provides
better system performance because it doubles the data transfer rate.
Single Channel DIMMs are on the same channel. DIMMs in a channel can be identi-
cal or completely different. However, we highly recommend using
identical DIMMs. Not all slots need to be populated.
Dual Channel DIMMs of the same memory configuration are on different channels.
Installing the DIMM Module
Before installing the memory module, please make sure that the following safety cautions are
well-attended.
1. Make sure the PC and all other peripheral devices connected to it has been powered
down.
2. Disconnect all power cords and cables.
3. Locate the DIMM socket on the system board
4. Make sure the notch on memory card is aligned to the key on the socket.
Socket Side View
Socket Top View
DDR4 DIMM
Notch
Key
Eject TabEject Tab
Step 3
Step 2
Step 1 Step 1
Step 2
Step 3
►System Memory

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Chapter 2 - Hardware Installation
11
Please follow the steps below to install the memory card into the socket.
Step 1:
Press the eject tabs at both ends of the socket outward and downward to release them from the
locked position.
Step 2:
Insert the memory card into the slot while making sure the notch and the key are aligned. Press
the card down firmly with fingers while applying and maintaining even pressure on both ends.
Step 3:
The tabs snap automatically to the edges of the card and lock the card in place.
Socket Side View
Socket Top View
DDR4 DIMM
Notch
Key
Eject TabEject Tab
Step 3
Step 2
Step 1
Step 1
Step 2
Step 3
►System Memory
►Installing the DIMM Module
►CPU
The system board is equipped with a surface mount LGA 1151 socket. This socket is exclu-
sively designed for installing a LGA 1151 packaged Intel CPU.
Protective
cap
Note:
The system board used in the following illustrations may not resemble the actual
board. These illustrations are for reference only.
Important:
1. Before you proceed, make sure (1) the LGA 1151 socket comes with a protec-
tive cap, (2) the cap is not damaged and (3) the socket’s contact pins are not
bent. If the cap is missing or the cap and/or contact pins are damaged, contact
your dealer immediately.
2. Make sure to keep the protective cap. RMA requests will be accepted and pro-
cessed only if the LGA 1151 socket comes with the protective cap.

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Chapter 2 - Hardware Installation
12
2
2
G2
I C
Battery
6. Remove the protective cap from
the CPU socket. The cap is used
to protect the CPU socket against
dust and harmful particles. Re-
move the protective cap only
when you are about to install the
CPU.
5. Lift the load lever and the load
plate all the way up as shown in
the photo.
Load lever
Load
plate
Protective cap
7-1.Insert the CPU into
the socket. The gold
triangular mark on the
CPU must align with
the chamfer corner of
the CPU socket shown
in the photo.
Golden triangular
mark
►CPU
►Installing the CPU
Installing the CPU
1. Make sure the PC and all other peripheral devices connected to it have been powered
down.
2. Disconnect all power cords and cables.
3. Locate the LGA 1151 CPU
socket on the system board.
4. Unlock the socket by pressing
the load lever down, moving
it sideways until to escape the
retention tab. Lift the load lever
up when it’s released.
Retention tab
Load lever
Important:
The CPU socket must not come in contact with anything other than the CPU. Avoid
unnecessary exposure. Remove the protective cap only when you are about to in-
stall the CPU.
►CPU

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Chapter 2 - Hardware Installation
13
7-2.Two keys on the sock-
et and notches on
the CPU also facilitate
alignment.
7-3.The CPU’s notch will
fit into the socket’s
alignment key when
it’s seated in the cor-
rect orientation.
Alignment key
Alignment key
►CPU
►Installing the CPU
8. Close the load plate
then push the load le-
ver down.
While closing the load
plate, make sure the
front edge of the load
plate slides under the
retention knob.
9. Press down the load
lever and hook it un-
der the retention tab.
Retention knob
Load lever
Important:
The CPU will fit in only one orientation and can easily be seated without exerting
any force.

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CS331-C246/Q370
Chapter 2 - Hardware Installation
14
2
2
G2
I C
Battery
Installing the Fan and Heat Sink
The CPU must be kept cool by using a CPU fan with heat sink. Without sufficient air circula-
tion across the CPU and heat sink, the CPU will overheat damaging both the CPU and system
board.
1. Before you install the fan / heat sink, you must apply a thermal paste onto the top of
the CPU. The thermal paste is usually supplied when you purchase the fan / heat sink
assembly. Do not spread the paste all over the surface. When you later place the heat
sink on top of the CPU, the compound will disperse evenly.
Some heat sinks come with a patch of pre-applied thermal paste. Do not apply thermal
paste if the fan / heat sink already has a patch of thermal paste on its underside. Peel
the strip that covers the paste before you place the fan / heat sink on top of the CPU.
2. Place the heat sink on
top of the CPU. The 4
spring screws around
the heat sink, which
are used to secure
the heat sink onto the
system board, must
match the 4 mount-
ing holes around the
socket.
Mounting
holes
3. Orient the heat sink
so that the CPU fan’s
cable is nearest the
CPU fan connector.
CPU fan
connector
►CPU
4. Screw tight two of
the spring screws at
opposite corners into
the mounting holes.
And then proceed with
the other two spring
screws.
Heat sink
“Locked” position of
push-pin
5. Connect the CPU fan’s
cable to the CPU fan
connector on the sys-
tem board.
“Unlocked” position
of push-pin
Note:
A boxed Intel®processor already includes the CPU fan and heat sink assembly. If
your CPU was purchased separately, make sure to only use Intel®-certified fan and
heat sink.

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Chapter 2 - Hardware Installation
15
2
2
G2
I C
Battery
JP5
2-3 On:
Clear CMOS
1-2 On:
Normal (default)
31 2
31 2
Mini PCIe/mSATA Signal Select
JP9 is used to select the Mini PCIe (full-size) signal: Mini PCIe (default) or mSATA.
2
2
G2
I C
Battery
JP9
2-3 On:
mSATA
1-2 On:
Mini PCIe
(default)
31 2
31 2
►Jumper Settings
Clear CMOS
►Jumper Settings
If any anomaly of the followings is encountered —
a) CMOS data is corrupted;
b) you forgot the supervisor or user password;
c) failure to start the system due to BIOS mis-configuration
— it is suggested that the system be reconfigured with default values stored in the ROM BIOS.
To load the default values stored in the ROM BIOS, please follow the steps below.
1. Power-off the system and unplug the power cord.
2. Put a jumper cap on JP9’s pin 2 and pin 3. Wait for a few seconds and set JP9 back to
its default setting, i.e. jumper cap on pin 1 and pin 2.
3. Plug the power cord and power-on the system.

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CS331-C246/Q370
Chapter 2 - Hardware Installation
16
COM1/COM2 RS232/422/485 Select
2
2
G2
I C
Battery
JP1/JP2/JP3 (for COM 1) and JP6/JP8/JP10 (for COM 2) are used to configure the COM ports
to RS232, RS422 (Full Duplex) or RS485. When COM 1 RS232/422/485 is selected, JP1 and
JP2 must be set in accordance to JP3. When COM 2 RS232/422/485 is selected, JP6 and JP8
must be set in accordance to JP10. The pin functions of the COM ports will vary according to
the jumpers’ setting.
COM 2
COM 1
JP8 (COM 2)
2
1
9
JP1 (COM 1)
JP3
(COM 1)
JP2
(COM 1)
JP6 (COM 2)
JP10 (COM 2)
▼JP3 (COM1)/JP10 (COM2)
▼COM 1/COM 2
12 3 4 5
6 7 8 9
1-3, 4-6 On:
RS232 (default) 3-5, 4-6 On:
RS422 Full Duplex 3-5, 2-4 On:
RS485
2 4 6
1 3 5
2 4 6
135
2 4 6
1 3 5
2
1
9
Pin RS232 RS422 Full Duplex RS485
1DCD- RX+ DATA+
2SIN- RX- DATA-
3SO- TX+ NC
4DTR- TX- NC
5GND GND GND
6DSR- NC NC
7RTS- NC NC
8CTS- NC NC
9RI- NC NC
▼JP1/JP2 (COM 1)
1-3, 2-4 On:
RS232 (default) 3-5, 4-6 On:
RS422 Full Duplex 3-5, 4-6 On:
RS485
▼JP6/JP8 (COM 2)
2 4 6
135
2 4 6
135
2 4 6
1 3 5
1-3, 2-4 On:
RS232 (default) 3-5, 4-6 On:
RS422 Full Duplex 3-5, 4-6 On:
RS485
2 4 6
1 3 5
2 4 6
135
2 4 6
135
►Jumper Settings

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CS331-C246/Q370
Chapter 2 - Hardware Installation
17
JP7 (COM 2)
COM1/COM2 RS232 Power Select
2
2
G2
I C
Battery
COM 2
COM 1
2
1
9
JP4 (COM 1)
JP4 (for COM 1) and JP7 (for COM 2) are used to configure Serial COM ports to pure RS232
or RS232 with power. The pin functions of COM 1 and COM 2 will vary according to JP4’s and
JP7’s setting respectively.
12 3 4 5
6 7 8 9
2
19
Pin RS232 RS232 with power
1DCD- +12V
2SIN- SIN-
3SO- SO-
4DTR- DTR-
5GND GND
6DSR- DSR-
7RTS- RTS-
8CTS- CTS-
9RI- +5V
▼JP4 (COM 1)
1-3 (RI-), 2-4 (DCD-) On:
RS232 (default) 3-5 (+5V), 4-6 (+12V) On:
RS232 with power
▼JP7 (COM 2)
2 4 6
135
2 4 6
135
1-3 (RI-), 2-4 (DCD-) On:
RS232 (default) 3-5 (+5V), 4-6 (+12V) On:
RS232 with power
2 4 6
135
2 4 6
135
►Jumper Settings
▼COM 1/COM 2

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CS331-C246/Q370
Chapter 2 - Hardware Installation
18
JP15, JP16, JP17, JP18, JP19 and JP21 are used to select the power of the USB ports. Select-
ing +5VDU will allow you to use a USB device to wake up the system.
USB Power Select
2-3 On: +5V
1-2 On:
+5VDU (default)
3
1
2
3
1
2
1
3
2
1
3
2
2
2
G2
I C
Battery
USB 2.0 5-6
(JP21)
USB 3.1 1-2
(JP15)
USB 3.1 5-6
(JP19)
1-2 On:
+5VDU (default)
1-2 On:
+5VDU (default)
2-3 On: +5V
2-3 On: +5V
2-3 On: +5V
1-2 On:
+5VDU (default)
31 2 31 2
USB 3.1 3-4
(JP16)
1-2 On:
+5VDU (default) 2-3 On: +5V
USB 2.0 9-10
(JP18)
1-2 On:
+5VDU (default) 2-3 On: +5V
USB 2.0 7-8
(JP17)
PS/2 Power Select
JP20 is designed to select the PS/2 power: +5VDU (default) or +5V.
2
2
G2
I C
Battery
JP20
2-3 On:
+5V
1-2 On:
+5VDU (default)
1
3
2
1
3
21
3
2
1
3
2
3 12
3 12
31 2 31 2
►Jumper Settings
►Jumper Settings
Important:
If you are using the Wake-On-USB Keyboard/Mouse function for 2 USB ports, the
+5V_standby power source of your power supply must support ≥1.5A. For 3 or
more USB ports, the +5V_standby power source of your power supply must sup-
port ≥2A.

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CS331-C246/Q370
Chapter 2 - Hardware Installation
19
The rear panel I/O ports consist of the following:
• 1 PS/2 Keyboard/Mouse port
• 2 USB 2.0 ports
• 1 Serial COM port
• 1 HDMI port
• 1 DVI-I (DVI-D signal) port
• 1 DP++ port
• 2 RJ45 LAN ports
• 2 USB 3.1 Gen 1 ports
• 2 USB 3.1 Gen 2 ports
• 1 Line-in jack (optional)
• 1 Line-out jack
• 1 Mic-in jack
PS/2 Keyboard/Mouse Port
PS/2 Keyboard/Mouse
This rear I/O port is used to connect a PS/2 mouse and a PS/2 keyboard. The PS/2 mouse
port uses IRQ12.
HDMI
DVI-I
(DVI-D signal)
Line-out
Mic-in
LAN 1
COM 1
DP++
PS/2 KB/MS
USB 3.1
Gen 1
USB 2.0
LAN 2
2
2
G2
I C
Battery
USB 3.1
Gen 2
►Rear Panel I/O Ports
Overview
►Rear Panel I/O Ports

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CS331-C246/Q370
Chapter 2 - Hardware Installation
20
COM (Serial) Ports
The pin functions of COM 1 port will vary according to setting of JP1, JP2, JP3 and JP4. Refer
to “COM1/COM2 RS232/422/485 Select” and “COM1/COM2 RS232/Power Select” in this chapter
for more information.
The pin functions of COM 2 port will vary according to setting of JP6, JP7, JP8 and JP10. Refer
to “COM1/COM2 RS232/422/485 Select” and “COM1/COM2 RS232/Power Select” in this chapter
for more information.
COM 3 and COM 4 are fixed at RS232. The pin functions are listed at right.
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
Connecting External Serial Ports
Your COM port may come mounted on a card-edge bracket. Install the card-edge bracket to
an available slot at the rear of the system chassis then insert the serial port cable to the COM
connector. Make sure the colored stripe on the ribbon cable is aligned with pin 1 of the COM
connector.
BIOS Setting
Configure the serial COM ports in the Advanced menu (“NCT6116D Super IO Configuration”
submenu) of the BIOS. Refer to the chapter 3 for more information.
2
2
G2
I C
Battery
COM 1:
RS232/422/485
COM 1
COM 3/4: RS232
Pin Assignment
1DCD-
2SIN-
3SO-
4DTR-
5GND
6DSR-
7RTS-
8CTS-
9RI-
▼COM 3/4 Pin Assignment
COM 2:
RS232/422/485
2
1
9
2
1
9
COM 2
COM 4COM 3
►Rear Panel I/O Ports