Avalue Technology EAX-R680P User manual

Part No. E2047AR6800R
EAX-R680P
Intel® 12th Gen Core™ i9/i7/i5/i3/ Processor ATX
Motherboard with Intel® R680E Chipset
User’s Manual
1st Ed –12 October 2022

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FCC Statement
THIS DEVICE COMPLIES WITH PART 15 FCC RULES. OPERATION IS
SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE.
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS
FOR A CLASS "A" DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES.
THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST
HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A
COMMERCIAL ENVIRONMENT. 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.
OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE
HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO
CORRECT THE INTERFERENCE AT HIS OWN EXPENSE.
Notice
This guide is designed for experienced users to setup the system within the shortest time.
For detailed information, please always refer to the electronic user's manual.
Copyright Notice
Copyright 2022 Avalue Technology Inc., ALL RIGHTS RESERVED.
No part of this document may be reproduced, copied, translated, or transmitted in any form
or by any means, electronic or mechanical, for any purpose, without the prior written
permission of the original manufacturer.
Trademark Acknowledgement
Brand and product names are trademarks or registered trademarks of their respective
owners.
Disclaimer
Avalue Technology Inc. reserves the right to make changes, without notice, to any product,
including circuits and/or software described or contained in this manual in order to improve
design and/or performance. Avalue Technology assumes no responsibility or liability for the
use of the described product(s), conveys no license or title under any patent, copyright, or
masks work rights to these products, and makes no representations or warranties that

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these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified. Applications that are described in this manual are for illustration
purposes only. Avalue Technology Inc. makes no representation or warranty that such
application will be suitable for the specified use without further testing or modification.
Life Support Policy
Avalue Technology’s PRODUCTS ARE NOT FOR USE AS CRITICAL COMPONENTS IN
LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE PRIOR WRITTEN APPROVAL
OF Avalue Technology Inc.
As used herein:
1. Life support devices or systems are devices or systems which, (a) are intended for
surgical implant into body, or (b) support or sustain life and whose failure to perform,
when properly used in accordance with instructions for use provided in the labeling, can
be reasonably expected to result in significant injury to the user.
2. A critical component is any component of a life support device or system whose
failure to perform can be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or effectiveness.
A Message to the Customer
Avalue Customer Services
Each and every Avalue’s product is built to the most exacting specifications to ensure
reliable performance in the harsh and demanding conditions typical of industrial
environments. Whether your new Avalue device is destined for the laboratory or the factory
floor, you can be assured that your product will provide the reliability and ease of operation
for which the name Avalue has come to be known.
Your satisfaction is our primary concern. Here is a guide to Avalue’s customer services. To
ensure you get the full benefit of our services, please follow the instructions below carefully.
Technical Support
We want you to get the maximum performance from your products. So if you run into
technical difficulties, we are here to help. For the most frequently asked questions, you can
easily find answers in your product documentation. These answers are normally a lot more
detailed than the ones we can give over the phone. So please consult the user’s manual
first.
To receive the latest version of the user’s manual; please visit our Web site at:
http://www.avalue.com.tw/

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Product Warranty
Avalue warrants to you, the original purchaser, that each of its products will be free from
defects in materials and workmanship for two years from the date of purchase.
This warranty does not apply to any products which have been repaired or altered by
persons other than repair personnel authorized by Avalue, or which have been subject to
misuse, abuse, accident or improper installation. Avalue assumes no liability under the
terms of this warranty as a consequence of such events. Because of Avalue’s high
quality-control standards and rigorous testing, most of our customers never need to use our
repair service. If any of Avalue’s products is defective, it will be repaired or replaced at no
charge during the warranty period. For out-of-warranty repairs, you will be billed according
to the cost of replacement materials, service time, and freight. Please consult your dealer
for more details. If you think you have a defective product, follow these steps:
1. Collect all the information about the problem encountered. (For example,
CPU type and speed, Avalue’s products model name, hardware & BIOS
revision number, other hardware and software used, etc.) Note anything
abnormal and list any on-screen messages you get when the problem occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information available.
3. If your product is diagnosed as defective, obtain an RMA (return material
authorization) number from your dealer. This allows us to process your good
return more quickly.
4. Carefully pack the defective product, a complete Repair and Replacement
Order Card and a photocopy proof of purchase date (such as your sales
receipt) in a shippable container. A product returned without proof of the
purchase date is not eligible for warranty service.
5. Write the RMA number visibly on the outside of the package and ship it
prepaid to your dealer.

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Content
1. Getting Started............................................................................................................9
1.1 Safety Precautions....................................................................................................9
1.2 Packing List...............................................................................................................9
1.3 Document Amendment History ...............................................................................10
1.4 Manual Objectives...................................................................................................11
1.5 System Specifications.............................................................................................12
1.6 Architecture Overview—Block Diagram..................................................................15
2. Hardware Configuration...........................................................................................16
2.1 Product Overview....................................................................................................17
2.2 Jumper and Connector List.....................................................................................18
2.3 Setting Jumpers & Connectors ...............................................................................20
2.3.1 Serial port 3 pin9 signal select (JRI3) ............................................................................................ 20
2.3.2 Serial port 2 pin9 signal select (JRI2) ............................................................................................ 20
2.3.3 Serial port 1 pin9 signal select (JRI1) ............................................................................................ 21
2.3.4 BIOS ME function configuration (JME1) ........................................................................................ 21
2.3.5 Clear CMOS (JCMOS1)................................................................................................................. 22
2.3.6 CPU TDP (Watts) (JCFGID1) **The original setting is not allowed to be changed by user** ....... 22
2.3.7 AT/ATX Power Mode Select (JSATX1).......................................................................................... 23
2.3.8 General purpose I/O connector (DIO1).......................................................................................... 23
2.3.9 ATX Power connector (ATXPWR1) ............................................................................................... 24
2.3.10 Power connector (ATX12V1)......................................................................................................... 24
2.3.11 SMBus connector (JSMB1)........................................................................................................... 25
2.3.12 Battery connector (BAT2).............................................................................................................. 25
2.3.13 Miscellaneous setting connector (SPI1)........................................................................................ 26
2.3.14 Front Panel connector (JFP1) ....................................................................................................... 26
2.3.15 CPU fan connector (CPUFAN1).................................................................................................... 27
2.3.16 System fan connector 1 (SYSFAN1)............................................................................................. 27
2.3.17 External Speaker connector (JBZ1).............................................................................................. 28
2.3.18 Auxiliary Panel connector (JAUXP1)............................................................................................. 28
2.3.19 Auxiliary Panel connector (JAUXP2)............................................................................................. 29
2.3.20 Serial port 2 connector (COM2)..................................................................................................... 29
2.3.21 USB connector 1 (JUSB1)............................................................................................................. 30
2.3.22 USB connector (JUSB2)................................................................................................................ 30
2.3.23 USB connector 4 (JUSB4)............................................................................................................. 31
2.3.24 J1RS2 connector (J1RS2)............................................................................................................. 31
2.3.25 J1RS3 connector (J1RS3)............................................................................................................. 32
2.3.26 Auxiliary Fan connector (AUXFAN1)............................................................................................. 32

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2.3.27 JPC1 connector (JPC1) **The original setting is not allowed to be changed by user**................ 33
2.3.28 Speaker connector (SPK1)............................................................................................................ 33
2.3.29 S/PDIF connector (JSPDIF1) ........................................................................................................ 34
2.3.30 FAUD1 connector (FAUD1)........................................................................................................... 34
2.3.31 JESPI1 connector (JESPI1) .......................................................................................................... 35
2.3.32 REAR1 connector (REAR1) .......................................................................................................... 35
2.3.33 10GFAN1 connector (10GFAN1) .................................................................................................. 36
2.3.34 Serial port connector (4COM1)...................................................................................................... 36
3.BIOS Setup....................................................................................................................37
3.1 Introduction.............................................................................................................38
3.2 Starting Setup .........................................................................................................38
3.3 Using Setup ............................................................................................................39
3.4 Getting Help............................................................................................................40
3.5 In Case of Problems................................................................................................40
3.6 BIOS setup..............................................................................................................41
3.6.1 Main Menu...................................................................................................................................... 41
3.6.1.1 System Language.................................................................................................................. 42
3.6.1.2 System Date.......................................................................................................................... 42
3.6.1.3 System Time.......................................................................................................................... 42
3.6.2 Advanced Menu ............................................................................................................................. 42
3.6.2.1 CPU Configuration................................................................................................................. 43
3.6.2.1.1 Efficient-core Information....................................................................................................... 44
3.6.2.1.2 Performance-core Information............................................................................................... 44
3.6.2.1.3 CPU - Power Management Control....................................................................................... 45
3.6.2.2 PCH-FW Configuration.......................................................................................................... 46
3.6.2.2.1 AMT Configuration................................................................................................................. 46
3.6.2.2.2 Firmware Update Configuration............................................................................................. 47
3.6.2.2.3 PTT Configuration ................................................................................................................. 47
3.6.2.3 Trusted Computing................................................................................................................ 48
3.6.2.4 ACPI Settings ........................................................................................................................ 48
3.6.2.5 Super IO Configuration.......................................................................................................... 49
3.6.2.5.1 Serial Port 1 Configuration .................................................................................................... 50
3.6.2.5.2 Serial Port 2 Configuration .................................................................................................... 50
3.6.2.5.3 Serial Port 3 Configuration .................................................................................................... 51
3.6.2.5.4 Serial Port 4 Configuration .................................................................................................... 51
3.6.2.5.5 Serial Port 5 Configuration .................................................................................................... 52
3.6.2.5.6 Serial Port 6 Configuration .................................................................................................... 52
3.6.2.6 NCT6126D HW Monitor......................................................................................................... 53
3.6.2.6.1 Smart Fan Configuration ....................................................................................................... 53
3.6.2.7 S5 RTC Wake Settings.......................................................................................................... 54

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3.6.2.8 Serial Port Console Redirection............................................................................................ 55
3.6.2.9 USB Configuration................................................................................................................. 56
3.6.2.10 Network Stack Configuration................................................................................................. 57
3.6.2.11 NVMe Configuration.............................................................................................................. 57
3.6.3 Chipset........................................................................................................................................... 58
3.6.3.1 System Agent (SA) Configuration.......................................................................................... 58
3.6.3.1.1 Memory Configuration........................................................................................................... 59
3.6.3.1.2 Graphics Configuration.......................................................................................................... 59
3.6.3.1.3 DMI/OPI Configuration .......................................................................................................... 60
3.6.3.1.4 VMD Configuration................................................................................................................ 60
3.6.3.1.5 PCI Express Configuration.................................................................................................... 61
3.6.3.1.5.1M.2 KeyM 2............................................................................................................................ 61
3.6.3.1.5.2PCI Express Slot 1 (PEG1) ................................................................................................... 62
3.6.3.1.5.3PCI Express Slot 2 (PEG2) ................................................................................................... 63
3.6.3.2 PCH-IO Configuration............................................................................................................ 64
3.6.3.2.1 PCI Express Configuration.................................................................................................... 64
3.6.3.2.1.1PCI Express Slot 1 (PCI-E Port 21~24)................................................................................. 65
3.6.3.2.1.2PCI Express Slot 2 (PCI-E Port 25~28)................................................................................. 66
3.6.3.2.1.3PCI Express Slot 3 (PCI-E Port 1~4)..................................................................................... 67
3.6.3.2.1.4PCI Express Slot 4 (PCI-E Port 5~6)..................................................................................... 68
3.6.3.2.1.5Intel I225/I226 LAN Chip (PCI-E Port 7)................................................................................ 69
3.6.3.2.1.6Intel I225/I226 LAN Chip (PCI-E Port 8)................................................................................ 70
3.6.3.2.1.7Intel X550-AT2 LAN Chip (PCI-E Port 9~12)........................................................................ 71
3.6.3.2.1.8M.2 KeyM 1 (PCI-E Port 13~16)............................................................................................ 72
3.6.3.2.2 SATA And RST Configuration............................................................................................... 73
3.6.3.2.3 HD Audio Configuration......................................................................................................... 74
3.6.3.3 Board Configuration............................................................................................................... 74
3.6.4 Security .......................................................................................................................................... 75
3.6.4.1 Secure Boot............................................................................................................................... 76
3.6.5 Boot................................................................................................................................................ 76
3.6.6 Save & Exit..................................................................................................................................... 77
3.6.6.1 Save Changes and Reset.......................................................................................................... 78
3.6.6.2 Discard Changes and Reset...................................................................................................... 78
3.6.6.3 Restore Defaults........................................................................................................................ 78
3.6.6.4 Launch EFI Shell from filesystem device................................................................................... 78
3.6.7 MEBx.............................................................................................................................................. 78
4. Drivers Installation.......................................................................................................79
4.1 Install Chipset Driver...............................................................................................80
4.2 Install VGA Driver....................................................................................................81
4.3 Install ME Driver......................................................................................................82

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4.4 Install Audio Driver (For Realtek ALC888S HD Audio)............................................83
4.5 Install LAN Driver....................................................................................................84
4.6 Install RST Driver....................................................................................................86
4.7 Install Serial IO Driver.............................................................................................87
4.8 Install AscendingSortNetworkAdapterByMac..........................................................88
5. Mechanical Drawing ....................................................................................................89
5.1 Mechanical Drawing................................................................................................90
5.2 Recommended Rubber Location ............................................................................91

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1. Getting Started
1.1 Safety Precautions
Warning!
Always completely disconnect the power cord from your
chassis whenever you work with the hardware. Do not
make connections while the power is on. Sensitive
electronic components can be damaged by sudden power
surges. Only experienced electronics personnel should
open the PC chassis.
Caution!
Always ground yourself to remove any static charge before
touching the CPU card. Modern electronic devices are very
sensitive to static electric charges. As a safety precaution,
use a grounding wrist strap at all times. Place all electronic
components in a static-dissipative surface or static-shielded
bag when they are not in the chassis.
1.2 Packing List
Before you begin installing your single board, please make sure that the
following materials have been shipped:
1 x EAX-R680P Motherboard
2 x SATA Cables
1 x I/O Shield
1 x Rubber (for CPU cooler supporting)

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1.3 Document Amendment History
Revision
Date
By
Comment
1st
October 2022
Avalue
Initial Release

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1.4 Manual Objectives
This manual describes in details Avalue Technology EAX-R680P Single Board.
We have tried to include as much information as possible but we have not duplicated
information that is provided in the standard IBM Technical References, unless it proved to
be necessary to aid in the understanding of this board.
We strongly recommend that you study this manual carefully before attempting to set up
EAX-R680P or change the standard configurations. Whilst all the necessary information is
available in this manual we would recommend that unless you are confident, you contact
your supplier for guidance.
Please be aware that it is possible to create configurations within the CMOS RAM that
make booting impossible. If this should happen, clear the CMOS settings, (see the
description of the Jumper Settings for details).
If you have any suggestions or find any errors regarding this manual and want to inform us
of these, please contact our Customer Service department with the relevant details.

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1.5 System Specifications
System
CPU
Intel® 12th Gen Core™ i9/i7/i5/i3 Processor, supports LGA 1700 CPU Up to 125W
Max
BIOS
AMI uEFI BIOS, 256Mbit SPI Flash ROM
System Chipset
Intel® R680E chipsets
I/O Chip
NuvoTon NCT6126D (eSPI super IO)
System Memory
4 DIMM Up to 128GB Dual Channel DDR4 3200MHz (Optional ECC Support
depending on selected CPU)
Watchdog Timer
H/W Reset, 5~255 seconds/5~255 minutes
H/W Status
Monitor
CPU temperature monitoring
Voltage monitoring
CPU fan speed control
RAID
Support RAID 0, 1, 5, 10
TPM
Onboard NuvoTon NPCT754AADYX supports TPM 2.0
iAMT
Yes, by CPU w/ vPro (i9/i7/i5)
Expansion Slot
M.2
2 x M.2 Key M 2242/2280/22110
PCIe
2 x PCIe x16 slot for 1 x PCIe x16 Gen5 or 2 x PCIe x8 Gen5 (PEG1/2)
2 x PCIe x4 Gen 4 (PCIE1/2)
1 x PCIe x4 slot for 1 x PCIe x2 Gen 3 only (PCIE4)
1 x PCIe x4 Gen3 (PCIE3)
Storage
M.2
2 x M.2 Key M NVMe 2242/2280/22110 (from PCH, with 1 x PCIe Gen4 x4
SATA
4 x SATAIII
Edge I/O
COM
1 x DB9 Connector at IO support RS-232
LAN
1 x dual deck RJ45 for 2 x 10G LAN (BOM optional, with heatsink)
1 x dual deck RJ45 for 2 x 2.5G LAN
USB 3.2
2 x 4-deck USB3.2 connector at I/O for 8 port USB3.2 Gen 2
DP/HDMI
2 x DP++, 1 x HDMI 2.0b
Onboard I/O
COM
COM1: by DB9 connector at rear IO support RS232
1 x 2 x 3 pin, pitch 2.00mm connector for COM1 pin9 RI/5V/12V jumper select
(JRI1)
COM2: by onboard pin-header support RS232/422/485 selected by BIOS
1 x 2 x 5 pin, pitch 2.00mm connector for COM2 to support RS232

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1 x 2 x 3 pin, pitch 2.00mm connector for COM2 to support RS422/485, Pin 5 with
+5V (J1RS2)
1 x 2 x 3 pin, pitch 2.00mm connector for COM2 pin9 RI/5V/12V jumper select
(JRI2)
COM3: support RS232/422/485 selected by BIOS
COM3~6: support RS232
1 x 2 x 20 pin, pitch 2.00mm connector for COM3~6 support RS232
1 x 2 x 3 pin, pitch 2.00mm connector for COM3 to support RS422/485, Pin 5 with
+5V (J1RS3)
1 x 2 x 3 pin, pitch 2.00mm connector for COM3 pin9 RI/5V/12V jumper select
(JRI3)
USB 2.0
2 x 2 x 5 pin, pitch 2.54mm connector for 4 x USB 2.0
1 x 1 x 5 pin, pitch 2.54mm connector for 1 x USB 2.0
**USB Wake up by BIOS Setting
USB 3.2
1 x USB3.2 Gen1 Vertical Type A
GPIO
1 x 2 x 10 pin, pitch 2.00mm connector for GPIO: 16 bits & +5VS Level SMBus
CPU/System FAN
1 x 1 x 4 pin, pitch 2.54mm CPU fan connector with smart fan function supported
1 x 1 x 4 pin, pitch 2.54mm System fan connector with smart fan function supported
1 x 1 x 3 pin, pitch 2.54mm System fan connector
1 x 1 x 2 pin, pitch 2.0mm (PH header) connector for the FAN of 10G LAN
Buzzer
1 x 4 pin, pitch 2.54mm connector (PH header) for Speaker Buzzer
Front Panel
1 x 2 x 5 pin, pitch 2.54mm connector for front panel
RTC Battery
1 x Horizontal type battery connector (CR2450 Battery)
Co-lay 1 x 2 Pin Pitch 1.25mm horizontal type battery connector
AT/ATX Selector
1 x 1 x 3 pin pitch 2.00mm connector for AT/ATX jumper
1 x 2 x 12 pin ATX power connector
1 x 2 x 4 pin ATX 12V power connector
Clear CMOS
1 x 1 x 3pin, pitch 2.54mm connector for CMOS Clear
BIOS SPI
1 x 2 x 6 pin, pitch 2.00mm connector for BIOS SPI
eSPI
Yes
Audio
1 x 2 x 5 pin, pitch 2.54mm connector for front Audio (Mic-in, Line-out)
1 x 2 x 6 pin, pitch 2.54mm connector for Rear Audio (5.1-CH Audio)
1 x 1 x 4 pin, pitch 2.54mm connector for S/PDIF
Auxiliary panel
1 x 2 x 10 pin, pitch 2.54mm connector for Auxiliary panel 1
1 x 2 x 4 pin, pitch 2.54mm connector Auxiliary panel 2 for LAN 3~4 LAN Active LED
Case open
Others
1 x 2 x 5 pin, pitch 2.54mm pin-header for JME
1 x 5 pin, pitch 2.54mm pin-header for +3.3S Level SMBus
1 x 2 x 3pin, pitch 2.54mm pin-header for power f/w adjustment (not for user to
modify)

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1 x 1 x 3pin, pitch 2.54mm pin-header for power f/w programming (not for user to
modify)
Display
Graphic Chipset
Intel® 12th Generation CPU integrated
Spec. &
Resolution
2 x DP (DP1.4a): Max: 7680 x 4320@60 Hz
2 x DP++:1920 x 1080@60 Hz
1 x HDMI: HDMI 2.0b, max resolution 4K x 2K@60 (with HDR)
Multiple Display
Yes, triple display
Audio
Audio Codec
Realtek ALC888S co-lay ALC897 (Default: ALC888S) HD Audio Decoding
Controller with 6W Amplifier
Amplifier
1 x 4 pin, pitch wafer 2.00mm connector for 6W x 2 Speaker
Ethernet
LAN Chipset
2 x Intel® i225-LM 2.5G Gigabit Controller
1 x Intel® X550-AT2 10G Gigabit Controller
LAN Spec.
i225-LM: 10/100/1000/2500 Base-Tx GbE compatible
X550AT2: 100/1000/2500/5000/10000 Base-Tx GbE compatible
Mechanical & Environmental Specification
Power
Requirement
+12V / +5V / 5VSB /+3.3V /-12V
ACPI
Single power ATX Support S0, S3, S4, S5
Power Mode
AT / ATX mode Switchable Through Jumper
Operating Temp.
0~55°C (32~131°F), 0.5m/s airflow, validated w/ i9-12900K CPU
Storage Temp.
-40~ +75°C
Operating
Humidity
40°C @ 95% Relative Humidity, Non-condensing
PCB Material
6 Layers, NPG-170D
Size (L x W)
12" x 9.6" (304.8mm x 243.84mm)
Weight
1.54lbs (0.7kg)
OS Information
BIOS Support:
1. Win10 64bit UEFI
2. Linux
Note: Specifications are subject to change without notice.

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1.6 Architecture Overview—Block Diagram
The following block diagram shows the architecture and main components of EAX-R680P.

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2. Hardware
Configuration

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2.1 Product Overview

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2.2 Jumper and Connector List
You can configure your board to match the needs of your application by setting jumpers. A
jumper is the simplest kind of electric switch.
It consists of two metal pins and a small metal clip (often protected by a plastic cover) that
slides over the pins to connect them. To “close” a jumper you connect the pins with the clip.
To “open” a jumper you remove the clip. Sometimes a jumper will have three pins, labeled 1,
2, and 3. In this case, you would connect either two pins.
The jumper settings are schematically depicted in this manual as follows:
A pair of needle-nose pliers may be helpful when working with jumpers.
Connectors on the board are linked to external devices such as hard disk drives, a
keyboard, or floppy drives. In addition, the board has a number of jumpers that allow you to
configure your system to suit your application.
If you have any doubts about the best hardware configuration for your application, contact
your local distributor or sales representative before you make any changes.
The following tables list the function of each of the board’s jumpers and connectors.
Jumpers
Label
Function
Note
JRI1/2/3
Serial port 1/2/3 pin9 signal select
3 x 2 header, pitch 2.00mm
JME1
BIOS ME function configuration
3 x 1 header, pitch 2.54mm
JSATX1
AT/ATX Power Mode Select
3 x 1 header, pitch 2.00mm
JCMOS1
Clear CMOS
3 x 1 header, pitch 2.54mm
JCFGID1
CPU TDP (Watts)
3 x 1 header, pitch 2.54mm
Connectors
Label
Function
Note
CPUFAN1
CPU fan connector
4 x 1 wafer, pitch 2.54mm
SYSFAN1
System fan connector 1
(with smart fan function supported)
4 x 1 wafer, pitch 2.54mm
JFP1
Front Panel connector
5 x 2 header, pitch 2.54 mm

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DIMMA1/2/3/4
240-pin DIMM slot 1
JSMB1
SMBus connector
5 x 1 header, pitch 2.54 mm
JAUXP1
Auxiliary Panel connector
10 x 2 header, pitch 2.54 mm
JAUXP2
Auxiliary Panel connector
4 x 2 header, pitch 2.54 mm
SPI1
Miscellaneous setting connector
4 x 2 header, pitch 2.00mm
COM2
Serial Port2 connector
5 x 2 box header, pitch 2.00 mm
4COM1
Serial Port connector
20 x 2 header, pitch 2.00mm
JBZ1
External Speaker connector
4 x 1 header, pitch 2.54 mm
DIO1
General purpose I/O connector
10 x 2 header, pitch 2.00mm
LAN1/2
RJ-45 Ethernet 1/2
COM-HDMI1
COM-HDMI1 connector
USB1/2
USB connector
JUSB1
USB connector
5 x 2 header, pitch 2.54mm
JUSB2
USB connector
5 x 1 header, pitch 2.54mm
JUSB3
USB connector
JUSB4
USB connector
5 x 2 header, pitch 2.54mm
J1RS2
J1RS2 connector
3 x 2 header, pitch 2.00 mm
J1RS3
J1RS3 connector
3 x 2 header, pitch 2.00 mm
PCIE1/2/3/4
PCIe slot 1/2/3/4
M2KM1/2
M.2 Key M 1/2
BAT1
Battery connector
BAT2
Battery connector
2 x 1 wafer, pitch 1.25mm
AUXFAN1
Auxiliary Fan connector
3 x 1 wafer, pitch 2.54mm
ATXPWR1
ATX Power connector
12 x 2 wafer, pitch 4.20mm
ATX12V1
Power connector
2 x 4 wafer, pitch 4.20mm
JSATA1/2/3/4
Serial ATA connector 1/2/3/4
CPU1
CPU connector
DP1
DP connector
PEG2
PCI-e x16 slots 2
JPC1
JPC1 connector
3 x 2 header, pitch 2.54 mm
SPK1
Speaker connector
4 x 1 wafer, pitch 4.20mm
JSPDIF1
S/PDIF connector
4 x 1 header, pitch 2.54mm
FAUD1
FAUD1 connector
5 x 2 header, pitch 2.54mm
JESPI1
JESPI1 connector
6 x 2 header, pitch 2.00 mm
REAR1
REAR1 connector
6 x 2 header, pitch 2.54mm
10GFAN1
10GFAN1 connector
2 x 1 wafer, pitch 2.00mm

EAX-R680P User’s Manual
20 EAX-R680P User’s Manual
2.3 Setting Jumpers & Connectors
2.3.1 Serial port 3 pin9 signal select (JRI3)
* Default
Ring*
+5V
+12V
2.3.2 Serial port 2 pin9 signal select (JRI2)
* Default
Ring*
+5V
+12V