Advantech ASMB-831 Series User manual

User Manual
ASMB-831 Series
Socket SP5 (LGA 6096) AMD
EPYC™ 9004 Server Board with
6 REG-DDR5, 5 PCIe 5.0 x16, 2
PCIe 5.0 x8, 2 M.2 NVMe, 9
SATA3, 7 USB 3.2 Gen1, Dual
10GbE, IPMI

ASMB-831 User Manual ii
Copyright
The documentation and the software included with this product are copyrighted 2023
by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd. reserves the right
to make improvements in the products described in this manual at any time without
notice. No part of this manual may be reproduced, copied, translated, or transmitted
in any form or by any means without the prior written permission of Advantech Co.,
Ltd. The information provided in this manual is intended to be accurate and reliable.
However, Advantech Co., Ltd. assumes no responsibility for its use, nor for any
infringements of the rights of third parties that may result from its use.
Acknowledgments
AMD and EPYC™ are trademarks of AMD Corporation.
Microsoft Windows and MS-DOS are registered trademarks of Microsoft® Corp.
All other product names or trademarks are properties of their respective owners.
Product Warranty (2 years)
Advantech warrants 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 that have been repaired or altered by
persons other than repair personnel authorized by Advantech, or products that have
been subject to misuse, abuse, accident, or improper installation. Advantech
assumes no liability under the terms of this warranty as a consequence of such
events.
Because of Advantech’s high quality-control standards and rigorous testing, most
customers never need to use our repair service. If an Advantech product is defective,
it will be repaired or replaced free of charge during the warranty period. For out-of-
warranty repairs, customers will be billed according to the cost of replacement mate-
rials, service time, and freight. Please consult your dealer for more details.
If you believe your product is defective, follow the steps outlined below.
1. Collect all the information about the problem encountered. (For example, CPU
speed, Advantech products used, other hardware and software used, etc.) Note
anything abnormal and list any onscreen messages displayed when the prob-
lem occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information readily available.
3. If your product is diagnosed as defective, obtain a return merchandise authori-
zation (RMA) number from your dealer. This allows us to process your return
more quickly.
4. Carefully pack the defective product, a completed Repair and Replacement
Order Card, and a proof of purchase date (such as a photocopy of your sales
receipt) into a shippable container. Products returned without a proof of pur-
chase date are not eligible for warranty service.
5. Write the RMA number clearly on the outside of the package and ship the pack-
age prepaid to your dealer.
Part No. 2002083100 Edition 1
Printed in China August 2023

iii ASMB-831 User Manual
A Message to the Customer
Advantech Customer Services
Each and every Advantech product is built to the most exacting specifications to
ensure reliable performance in the harsh and demanding conditions typical of indus-
trial environments. Whether your new Advantech equipment is destined for the labo-
ratory or the factory floor, you can be assured that your product will provide the
reliability and ease of operation for which the name Advantech has come to be
known. Your satisfaction is our primary concern. Here is a guide to Advantech’s cus-
tomer 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 nor-
mally a lot more detailed than the ones we can give over the phone, so please con-
sult this manual first. If you still cannot find the answer, gather all the information or
questions that apply to your problem, and with the product close at hand, call your
dealer. Our dealers are well trained and ready to give you the support you need to get
the most from your Advantech products. In fact, most problems reported are minor
and are easily solved over the phone.
In addition, free technical support is available from Advantech engineers every busi-
ness day. We are always ready to give advice on application requirements or specific
information on the installation and operation of any of our products.
Declaration of Conformity
FCC Class B
This equipment has been tested and found to comply with the limits for a Class B dig-
ital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference 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 interfer-
ence 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 encouraged 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 receiver.
Connect the equipment to a power outlet on a circuit different from that to which
the receiver is connected.
Consult the dealer or an experienced radio/TV technician for assistance.
Caution! There is danger of a new battery exploding if it is incorrectly installed. Do
not attempt to recharge, force open, or heat the battery. Replace the
battery only with the same or equivalent type recommended by the man-
ufacturer. Discard used batteries according to the manufacturer's
instructions.

ASMB-831 User Manual iv
Initial Inspection
Before installing the motherboard, please make sure that the following materials
have been shipped:
1 x ASMB-831 ATX motherboard
1 x ASMB-831 Startup Manual
1 x Serial ATA HDD data cable
1 x I/O port bracket
2 x CPU power cables (8P)
1 x SATA power cable
1 x front panel converter cable
2 x screws for an M.2 device
1 x warranty card
1 x PCIe I/O support plate
If any of these items are missing or damaged, contact your distributor or sales repre-
sentative immediately. We have carefully inspected the ASMB-831 mechanically and
electrically before shipment. It should be free of marks and scratches and in perfect
working order upon receipt. When unpacking the ASMB-831, check it for signs of
shipping damage. (For example, damaged box, scratches, dents, etc.) If it is dam-
aged or it fails to meet the specifications, notify our service department or local sales
representative immediately. Also notify the carrier. Retain the shipping carton and
packing material for inspection by the carrier. After inspection, we will make arrange-
ments to repair or replace the unit.
Ordering Information
Part Number Storage Expansion Slot IPMI 10GbE LAN VGA Chip
ASMB-831T2-00A1 9*SATA3 + 2*M.2 5 PCIe x16 + 2 PCIe x8 (Gen5) Yes Yes AST2600

v ASMB-831 User Manual
Contents
Chapter 1 Overview...............................................1
1.1 Introduction ............................................................................................... 2
1.2 Features .................................................................................................... 2
1.2.1 General ......................................................................................... 2
1.3 Specifications............................................................................................ 3
Table 1.1: Specifications ............................................................. 3
1.4 Board Layout, Jumpers and Connectors................................................... 5
Figure 1.1 Board Layout .............................................................. 5
Figure 1.2 Rear IO of Full SKU.................................................... 5
Table 1.2: Onboard LAN LED Color Definition ............................ 6
Table 1.3: Jumpers...................................................................... 6
Table 1.4: Connectors ................................................................. 6
Table 1.5: Onboard LED.............................................................. 7
1.5 Block Diagram........................................................................................... 8
Figure 1.3 Block Diagram ............................................................ 8
1.6 System Memory ........................................................................................ 8
1.7 Installation of Memory Modules ................................................................ 9
Table 1.6: DIMM Configurations with a Single CPU.................... 9
1.8 Processor Installation.............................................................................. 10
Chapter 2 Connections.......................................13
2.1 Introduction ............................................................................................. 14
2.2 USB Ports (USB3C1, USB3C2, USB3H1, USB3A1) .............................. 14
2.3 LAN Ports (LAN1, LAN2, LAN3) ............................................................. 14
2.4 VGA Connector (VGA1).......................................................................... 15
2.5 Serial Ports (COM1)................................................................................ 15
2.6 SPI Flash Connector (SPI_CN1)............................................................. 16
2.7 CPU Fan Connector (CPUFAN0)............................................................ 16
2.8 System Fan Connector (SYSFAN0~4).................................................... 17
2.9 Front Panel Connector (JFP1+JFP2, JFP3) ........................................... 17
2.9.1 Power LED (JFP3) ...................................................................... 18
Table 2.1: ATX Power Supply LED Status ................................ 18
2.9.2 External Speaker (JFP1+JFP2 Pins 1, 4, 7, 10) ......................... 18
2.9.3 HDD LED Connector (JFP1+JFP2 Pins 2 & 5)........................... 18
2.9.4 Reset Connector (JFP1+JFP2 Pins 9 & 12) ............................... 18
2.10 Front Panel Connector (JFP1) ................................................................ 19
2.10.1 ATX Soft Power Switch (Pins 1, 3) ............................................. 19
2.10.2 Reset Connector (Pins 2, 4)........................................................ 19
2.10.3 Front Panel LAN Indicator Connector (Pins 5, 6, 7, 8)................ 20
2.10.4 HDD LED Connector (Pins 13, 15) ............................................. 20
2.10.5 Power LED (Pins 14, 16) ............................................................ 20
Table 2.2: System’s power LED status...................................... 20
2.11 Case Open (JCASE1) ............................................................................. 20
2.12 Front Panel LAN Indicator Connector (LANLED1).................................. 21
2.13 SATA Connector (SATA_CON1, SSATA)............................................... 21
2.14 M.2 Connector (M2_22110_1, M2_22110_2) ......................................... 22
2.15 PCIe Expansion Slots ............................................................................. 22
Table 2.3: PCIe Expansion Slots............................................... 22
Table 2.4: PCIe Expansion Slots............................................... 23
2.16 Auxiliary Power Connector (ATXPWR1/ ATX12V1/ATX12V2) ............... 23
2.17 PCIe Power Connector (SLOT12V1) ...................................................... 24
2.18 System LED Connector (SYS_LED1) ..................................................... 24
2.19 Clear CMOS Connector (JCMOS1) ........................................................ 25

ASMB-831 User Manual vi
2.20 PMBUS Connector (PMBUS1) ............................................................... 25
2.21 Front Panel SMBUS Connector (SMBUS1)............................................ 26
2.22 BMC IC Socket (BMC_SKT1) ................................................................. 26
2.23 GPIO Connector (GPIO1) ....................................................................... 26
Chapter 3 AMI BIOS............................................ 27
3.1 Introduction ............................................................................................. 28
Figure 3.1 Main Setup Screen................................................... 28
3.2 Entering BIOS Setup............................................................................... 29
3.2.1 Main Menu .................................................................................. 29
Figure 3.2 Main Setup Screen................................................... 29
3.2.2 System Date / System Time ....................................................... 29
3.3 Advanced BIOS Features Setup............................................................. 30
Figure 3.3 Advanced BIOS Features Setup Screen.................. 30
3.3.1 Trusted Computing ..................................................................... 31
Figure 3.4 Trusted Computing Screen ...................................... 31
3.3.2 PSP Firmware Versions.............................................................. 32
Figure 3.5 PSP Firmware Versions Screen............................... 32
3.3.3 Redfish Host Interface Settings .................................................. 33
Figure 3.6 Redfish Host Interface Settings screen .................... 33
3.3.4 AMD CBS ................................................................................... 34
Figure 3.7 AMD CBS Screen..................................................... 34
Figure 3.8 CPU Common Options Screen ................................ 34
Figure 3.9 CPU Common Options - Performance screen ......... 35
Figure 3.10 DF Common Options Screen .................................. 36
Figure 3.11 DF Common Options - Memory Addressing Screen36
Figure 3.12 NBIO Common Options Screen .............................. 37
Figure 3.13 SMU Common Options Screen ............................... 38
Figure 3.14 NBIO Common Options - PCIE Link Speed Capability
screen....................................................................... 39
Figure 3.15 FCH Common Options Screen................................ 40
Figure 3.16 SATA Configuration Options Screen....................... 41
Figure 3.17 SATA Controller Options Screen............................. 41
Figure 3.18 SATA Controller Enable Screen.............................. 42
Figure 3.19 SATA Controller eSATA Screen.............................. 43
Figure 3.20 SATA Port HotPlug Screen ..................................... 43
Figure 3.21 USB Configuration Options Screen......................... 44
Figure 3.22 AC Power Loss Options Screen.............................. 45
3.3.5 AST2600 Super IO Configuration ............................................... 46
Figure 3.23 AST2600 Super IO Configuration Screen ............... 46
Figure 3.24 Serial Port 1 Configuration Screen.......................... 46
3.3.6 Hardware Monitor ....................................................................... 47
Figure 3.25 IT8528 HW Monitor Screen..................................... 47
Figure 3.26 Fan Sensor Event Configuration screen ................. 48
Figure 3.27 CPU Warning Temperature screen ......................... 48
Figure 3.28 ACPI Shutdown Temperature screen...................... 49
Figure 3.29 Fan Mode Function screen...................................... 50
Figure 3.30 Smart Fan and Manual Mode Configuration screen 50
3.3.7 S5 RTC Wake Settings............................................................... 51
Figure 3.31 S5 RTC Wake Settings Screen ............................... 51
3.3.8 Serial Port Console Redirection.................................................. 52
Figure 3.32 Serial Port Console Redirection Screen.................. 52
Figure 3.33 COM1 Console Redirection Settings Screen .......... 52
Figure 3.34 Legacy Console Redirection Settings Screen ......... 54
Figure 3.35 Console Redirection Settings Screen...................... 54
3.3.9 CPU Configuration...................................................................... 55
Figure 3.36 CPU Configuration Screen ...................................... 55
Figure 3.37 Node 0 Information Screen ..................................... 56

vii ASMB-831 User Manual
3.3.10 PCI Subsystem Settings ............................................................. 56
Figure 3.38 PCI Subsystem Settings Screen ............................. 56
3.3.11 USB Configuration ...................................................................... 57
Figure 3.39 USB Configuration Screen ...................................... 57
Figure 3.40 USB Transfer Time-Out Screen .............................. 58
Figure 3.41 Device Reset Time-Out Screen............................... 58
Figure 3.42 Device Power-Up Delay Screen .............................. 59
Figure 3.43 Mass Storage Devices Screen ................................ 59
3.3.12 Network Stack Configuration ...................................................... 60
Figure 3.44 Network Stack Configuration Screen....................... 60
3.3.13 CSM Configuration...................................................................... 61
Figure 3.45 CSM Configuration Screen...................................... 61
Figure 3.46 Boot Option Filter Screen ........................................ 62
Figure 3.47 Option ROM Execution - Network Screen ............... 62
Figure 3.48 Option ROM Execution – Storage Screen............... 63
Figure 3.49 Option ROM execution - Video screen .................... 63
Figure 3.50 Option ROM execution - Other PCI devices screen 64
3.3.14 NVMe Configuration.................................................................... 64
Figure 3.51 NVMe Configuration Screen.................................... 64
3.3.15 SATA Configuration .................................................................... 65
Figure 3.52 SATA Configuration Screen .................................... 65
3.3.16 TLs Auth Configuration ............................................................... 65
Figure 3.53 TLS Auth Configuration Screen............................... 65
Figure 3.54 Server CA Configuration Screen ............................. 66
Figure 3.55 Server CA Configuration - Enroll Cert screen.......... 66
3.3.17 Driver Health............................................................................... 67
Figure 3.56 Driver Health screen................................................ 67
3.4 Chipset .................................................................................................... 67
Figure 3.57 Chipset Screen ........................................................ 67
3.4.1 North Bridge................................................................................ 68
Figure 3.58 North Bridge Screen ................................................ 68
Figure 3.59 Socket 0 Information Screen ................................... 69
3.4.2 Network Configuration ................................................................ 69
Figure 3.60 Network Configuration screen ................................. 69
3.4.3 PCIe Configuration...................................................................... 70
Figure 3.61 PCIe Configuration screen ...................................... 70
3.5 Security ................................................................................................... 71
Figure 3.62 Security Screen ....................................................... 71
Figure 3.63 Secure Boot Screen ................................................ 72
Figure 3.64 Key Management Screen ........................................ 73
3.6 Boot......................................................................................................... 74
Figure 3.65 Boot Screen............................................................. 74
3.7 Save & Exit.............................................................................................. 75
Figure 3.66 Save & Exit Screen.................................................. 75
3.8 Server Management................................................................................ 76
Figure 3.67 Server Management Screen.................................... 76
Figure 3.68 Wait for BMC screen ............................................... 77
3.8.1 System Event Log....................................................................... 77
Figure 3.69 System Event Log screen........................................ 77
3.8.2 BMC Self Test Log...................................................................... 78
Figure 3.70 BMC Self-Test Log Screen...................................... 78
3.8.3 BMC Network Configuration ....................................................... 79
Figure 3.71 BMC Network Configuration Screen........................ 79
Chapter 4 Chipset Software Installation Utility 81
4.1 Before Beginning..................................................................................... 82
4.2 Introduction ............................................................................................. 82
4.3 Windows Series Driver Setup ................................................................. 82

ASMB-831 User Manual viii
Figure 4.1 ASMB-831 Chipset Driver ........................................ 82
Chapter 5 Graphics Setup ................................. 83
5.1 Introduction ............................................................................................. 84
5.2 Windows Series Driver Setup ................................................................. 84
Figure 5.1 ASMB-831 Graphic Driver....................................... 84
Chapter 6 LAN Configuration ............................ 85
6.1 LAN Configuration................................................................................... 86
6.1.1 Introduction ................................................................................. 86
6.1.2 Windows Series Driver Setup ..................................................... 86
Figure 6.1 ASMB-831 LAN Driver ............................................. 86
Appendix A I/O Pin Assignments ......................... 87
A.1 USB 3.2 Gen1 Header (USB3H1)........................................................... 88
Table A.1: USB Header (USB3H1)............................................ 88
A.2 LAN Ports (LAN1, LAN2) ........................................................................ 88
Table A.2: LAN RJ-45 Port (LAN1, LAN2)................................. 88
A.3 VGA Connector (VGA1).......................................................................... 89
Table A.3: VGA Connector (VGA1) ........................................... 89
A.4 RS-232 Interface (COM1) ....................................................................... 89
Table A.4: RS-232 Connector (COM1)...................................... 89
A.5 System & CPU Fan Power Connector (SYSFAN0~4, CPUFAN0) ......... 90
Table A.5: CPU FAN Connector (CPUFAN0)............................ 90
Table A.6: SYS FAN Connector (SYSFAN0~4)......................... 90
A.6 Power LED (JFP3) .................................................................................. 90
Table A.7: Power LED Connector (JFP3).................................. 90
A.7 External Speaker Connector (JFP1+JFP2)............................................. 91
Table A.8: External Speaker Connector (JFP1+JFP2).............. 91
A.8 Reset Connector (JFP1+JFP2)............................................................... 91
Table A.9: Reset Connector (JFP1+JFP2) ............................... 91
A.9 HDD LED Connector (JFP1+JFP2) ........................................................ 91
Table A.10: HDD LED Connector (JFP1+JFP2)......................... 91
A.10 ATX Soft Power Switch (JFP1+JFP2)..................................................... 92
Table A.11: ATX Soft Power Switch (JFP1+JFP2)..................... 92
A.11 ATX Soft Power Switch (JFP1) ............................................................... 92
Table A.12: ATX Soft Power Switch (JFP1) ............................... 92
A.12 Reset Connector (JFP1) ......................................................................... 92
Table A.13: Reset Connector (JFP1).......................................... 92
A.13 Front Panel LAN LED Connector (JFP1) ................................................ 93
Table A.14: Front Panel LAN LED Connector (JFP1) ................ 93
A.14 HDD LED Connector (JFP1)................................................................... 93
Table A.15: SNMP SMBus Connector (JFP2) ............................ 93
A.15 Power LED (JFP1) .................................................................................. 94
Table A.16: Power LED (JFP1) .................................................. 94
A.16 SMBus Connector (SMBUS1)................................................................. 94
Table A.17: Front Panel SMBus Connector (SMBUS1) ............. 94
A.17 USB & LAN Ports (BMC_LAN_USB3C2) ............................................... 95
Table A.18: USB Port (BMC_LAN_USB3C2) ............................. 95
Table A.19: LAN RJ-45 Port (BMC_LAN_USB3C2)................... 95
A.18 Case Open Connector (JCASE1) ........................................................... 95
Table A.20: Case Open Connector (JCASE1)............................ 95
A.19 Front Panel LAN LED Connector (LANLED1) ........................................ 96
Table A.21: LAN LED Connector (LANLED1) ............................ 96
A.20 Clear CMOS Connector (JCMOS1) ........................................................ 96

ix ASMB-831 User Manual
Table A.22: Clear CMOS Connector (JCMOS1)......................... 96
A.21 PMBUS Connector (PMBUS1)................................................................ 96
Table A.23: PMBUS Connector (PMBUS1) ................................ 96
A.22 GPIO Connector (GPIO1) ....................................................................... 97
Table A.24: GPIO Connector (GPIO1)........................................ 97

ASMB-831 User Manual x

Chapter 1
1Overview

ASMB-831 User Manual 2
1.1 Introduction
The ASMB-831 server board is the most advanced AMD EPYC 9004 Processor fam-
ily board for server-grade IPC applications that require high-performance computing
power and multi-expansion slots. This board supports DDR5 ECC-REG 4800 MHz
memory up to a maximum of 768 GB. Equipped with PCIe 5.0, the ASMB-831 offers
a configuration that comprises five PCIe x16 slots and two PCIe x8 slots. Additionally,
the variant ASMB-831T2 SKU includes dual 10GbE Ethernet LAN ports, effectively
eliminating potential network bottlenecks. Furthermore, there's a dedicated GbE LAN
RJ-45 reserved for IPMI function, enabling seamless remote-control management
through AST-2600 BMC.
The ASMB-831 excels as an industrial server and networking solution due to its high
reliability and exceptional performance. Leveraging EPYC processors, this board
incorporates a range of features such as seven USB 3.2 Gen1 connectors, two Mini-
SAS HD ports supporting eight SATA III connections, one SATA III port, and two M.2
NVMe interfaces operating at PCIe 4.0 speeds. The integration of AMD Infinity Guard
enhances security by minimizing potential attack surfaces during software boot-up
and execution, ensuring data protection during processing.
Benefitting from the capabilities of the EPYC processor, the ASMB-831 single-socket
server board delivers robust computing power capable of efficiently managing sub-
stantial workloads. This eliminates the need to transition to dual-socket servers,
thereby reducing licensing costs and minimizing power consumption while still satis-
fying your business requirements.
1.2 Features
1.2.1 General
AMD EPYC 9004 Series Processor support: ASMB-831 is equipped with a
single CPU socket to support AMD EPYC 9004 Series processors from 16 to 96
cores (or 32 to 192 threads per socket).
High performance I/O capability: 2 x 10GbE LAN, 5 x PCIe 5.0 x16 slots (x16
link) + 2 x PCIe 5.0 x8 slots (x8 link), 9 x SATA (incl. 8 via Mini-SAS HD), and 2
x M.2 NVMe 2280/22110, 7 x USB 3.2 Gen1 (incl. 1 x Type-A) ports.
Standard ATX form factor with industrial features: ASMB-831 provides
industrial features like a long product lifecycle, reliable operation under a wide
temperature range, watchdog timer, etc.
IPMI 2.0 support: ASMB-831 is equipped with an ASPEED 2600 BMC chip and
supports IPMI 2.0 (Intelligent Platform Management Interface 2.0) via a dedi-
cated LAN and a shared LAN port.
KVM over IP: KVM over IP allows BIOS level remote control of ASMB-831
through your own computer.
Note! 1. The IPMI module will be included in ASMB-831T2 SKU, and the
ASMB-831T2 SKU can support 10GbE LAN ports.
2. Please refer to the ordering information at the front for IPMI and
LAN support for individual product SKUs.

3 ASMB-831 User Manual
Chapter 1 Overview
1.3 Specifications
Table 1.1: Specifications
Processor
CPU
Single socket LGA 6096 SP5
Supports the AMD EPYC 9004 processor family, from 16 to
96 cores (32 to 192 threads)
Supports TDP for up to 240 W
System Memory
Memory Capacity
DDR5 memory bus
Total 6 memory slots
Maximum 128GB ECC-REG per DIMM
One DIMM per channel
Memory Type Supports DDR5 3600/4000/4400/4800 MHz RDIMM modules
DIMM Sizes Each memory slot supports 8GB, 16GB, 32GB, 64GB, 128GB
memory modules.
Memory Voltage 1.1 V
Error Detection Corrects single-bit errors
Detects double-bit errors (using ECC memory)
Onboard Devices
SoC AMD EPYC 9004 SoC
Network Controllers
2 x Intel® X710 10GbE Ethernet Controllers connected to an
AMD EPYC CPU
Network supports 10GbE Base-T with RJ-45 output.
VGA ASPEED AST2600 controller with 64 MB VGA memory provides
basic 2D VGA functionality.
BMC Chip One Realtek 8211F Gigabit PHY connected to AST2600 for BMC
remote management
Input/Output
Storage Total 9 x SATA ports and 2 x M.2 provide SATA 6 Gb/s and
PCIe 8 Gb/s bandwidth
LAN
2 x RJ-45 LAN ports (2 x 10GbE LAN)
1 x RJ-45 dedicated IPMI LAN port (10/100 Mbps) for IPMI
only, there is no regular LAN function
USB
4 x USB 3.2 Gen1 ports at the rear window
1 x USB 3.2 Gen1 internal header (2 ports)
1 x USB 3.2 Gen1 internal Type-A port
Graphics 1 x VGA port.
Serial Port 1 x RS232 port at the rear window
Power Connector
System Power 1 x 24-pin SSI EPS 12V power connector (Input 12V, 5V, 3.3V,
5Vsb)
CPU Power 1 x 8-pin and 1 x 4-pin SSI EPS 12V power connectors for CPU &
memory power (12V)
PCIe slot power 1 x 8-pin 12V power connector for PCIe slot 12V input
Expansion Slots

ASMB-831 User Manual 4
PCI-Express Gen5
5 x PCIe x16 slots
–PCIEx16_SLOT1 (Gen5 x16 link, from CPU)
–PCIEx16_SLOT3 (Gen5 x16 link, from CPU)
–PCIEx16_SLOT5 (Gen5 x16 link, from CPU)
–PCIEx16_SLOT6 (Gen5 x16 link, from CPU)
–PCIEx16_SLOT7 (Gen5 x16 link, from CPU)
2 x PCIe x8 slots
–PCIEx8_SLOT2 (Gen5 x8 link, from CPU)
–PCIEx8_SLOT4 (Gen5 x8 link, from CPU)
System BIOS
BIOS Type 256 Mb SPI Flash EEPROM with AMI BIOS
PC Health Monitoring
Voltage Monitors for CPU Cores, +3.3V, +5V, +12V, +5V Standby, VBAT
FAN
One 4-pin header for the CPU cooler and five 4-pin headers
for system fans (front*4 + rear*1)
All fans have tachometer status monitoring
Thermal control for all fan connectors
Temperature Monitoring for CPU (PECI)
Monitoring for System (BMC)
Other Features (Case
Open)
Chassis intrusion detection
Chassis intrusion header
Operating Environment / Compliance
RoHS RoHS 6/6 Pb-Free Compliant
Environmental Spec.
Operating temperature: 0 to 60 °C
Non-operating temperature: -40 to 85 °C
Operating relative humidity: 10% to 95% (non-condensing)
Non-operating relative humidity: 10% to 95% (non-condens-
ing)
Table 1.1: Specifications

5 ASMB-831 User Manual
Chapter 1 Overview
1.4 Board Layout, Jumpers and Connectors
Connectors on the ASMB-831 are linked to external devices such as hard disk
drives. In addition, ASMB-831 has a number of jumpers that are used to configure
the system for specific applications.
The tables below list the functions of each jumper and connector. Later sections in
this chapter give instructions for setting jumpers. Chapter 2 gives instructions for con-
necting external devices to ASMB-831.
Figure 1.1 Board Layout
Figure 1.2 Rear IO of Full SKU
LAN 2 is shared LAN with BMC.
LAN 3 is dedicated BMC LAN.
VGA1
ESPI1
ATX12V2
AMD LGA6096 CPU0
BMC_UART1
SYSFAN4
C0_DIMM_A1
PMBUS1
BMC_LAN_USB3C2
PCIEX16_SLOT7
ATXPWR1
SLOT12V1
SPI_CN1
BIOS_SKT1
C0_DIMM_B1
C0_DIMM_C1
C0_DIMM_G1
C0_DIMM_H1
C0_DIMM_I1
COM1
LAN1
LAN2
USB3C1
PCIEX16_SLOT6
PCIEX16_SLOT5
PCIEX8_SLOT4
PCIEX16_SLOT3
PCIEX8_SLOT2
PCIEX16_SLOT1
BMC_SKT1
JWDT1
GPIO1
ATX12V1
PSON1
USB3A1
JFP1
JFP1+JFP2
JCASE1
JFP3
LANLED1
JCMOS1
BH1
BH2
SYSFAN0
SYS_LED1
SMBUS1
SYSFAN1
EX_THR1
SYSFAN3
SYSFAN2
SSATA
SATA_CON1
CPUFAN0
USB3H1
M2_22110_1
M2_22110_2
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ASMB-831 User Manual 6
Table 1.2: Onboard LAN LED Color Definition
100/1000 & 10G Mbps LAN Link/Activity LED Scheme
LAN1 & LAN2 (10G)
Left LED Right LED
100 Mbps Link
Active
Off
Off
Green
Blinking green
1000 Mbps Link
Active
Amber
Amber
Green
Blinking green
10G Mbps Link
Active
Green
Green
Green
Blinking green
No Link Off Off
Table 1.3: Jumpers
Label Function Default
JCMOS1 Clear CMOS 1-2
JWDT1 Watchdog timer reset 1-2
PSON1 AT(1-2) / ATX(2-3) 2-3
JCASE1 Chassis case open alarm 1-2
Keep CMOS data Clear CMOS data
Table 1.4: Connectors
Label Function
ATX12V1 SSI EPS 12V auxiliary power connector for CPU0
ATX12V2 SSI EPS 12V auxiliary power connector for CPU0
ATXPWR1 SSI EPS 24-pin main power connector (for system)
BH1 For RTC battery
BH2 For optional battery kit
BIOS_SKT1 BIOS SPI ROM
BMC_LAN_USB3C2 IPMI dedicated LAN connector & USB 3.2 port 3, 4
BMC_SKT1 IPMI ROM
BMC_UART1 IPMI UART connector
COM1 Serial port: RS-232
CPU0 AMD LGA6096 CPU0 socket
CPUFAN0 CPU0 fan connector (4-pin)
C0_DIMM_A1 Channel A DIMM1
C0_DIMM_B1 Channel B DIMM1

7 ASMB-831 User Manual
Chapter 1 Overview
C0_DIMM_C1 Channel C DIMM1
C0_DIMM_G1 Channel G DIMM1
C0_DIMM_H1 Channel H DIMM1
C0_DIMM_I1 Channel I DIMM1
ESPI1 ESPI connector
EX_THR1 Connector for external thermistor. Jumper JTHR_SEL1 doesn't
need to be adjusted
GPIO1 GPIO function for customized usage
JFP1
Front panel pin header. To support 1U chassis (Cable P/N:
1700031926-11) Power Switch/Power Reset/Power LED/
LAN1LED/LAN2LED/HDD LED
JFP1+JFP2 Front panel pin header. Power Switch/Reset connector External
speaker/HDD LED connector / SMBus connector
JFP3 Front panel pin header. Keyboard Lock and Power LED
LAN1, LAN2 RJ-45 LAN connector
LANLED1 LAN LED extension connector
M2_22110_1 M.2 connector (SATA & PCIe x4)
M2_22110_2 M.2 connector (PCIe x4)
PMBUS1 PMBUS connector to communicate with power supply
SATA_CON1, SSATA Serial ATA0~8 (SATA 0~7 via SFF8643 connector)
PCIEX16_SLOT1 PCIE x16 slot (x16 link) (CPU)
PCIEX8_SLOT2 PCIE x8 slot (x8 link) (CPU)
PCIEX16_SLOT3 PCIE x16 slot (x16 link) (CPU)
PCIEX8_SLOT4 PCIE x8 slot (x8 link) (CPU)
PCIEX16_SLOT5 PCIE x16 slot (x16 link) (CPU)
PCIEX16_SLOT6 PCIE x16 slot (x16 link) (CPU)
PCIEX16_SLOT7 PCIE x16 slot (x16 link) (CPU)
SLOT12V1 For PCIe slot 12V input only
SMBUS1 SMBus header (SMBus from either BMC or CPU)
SPI_CN1 Connector for BIOS update tool
SYSFAN0~SYSFAN4 System FAN connector
SYS_LED1 System LED connector
USB3A1, USB3C1,
USB3H1
USB 3.2 port 1, 2; USB 3.2 port 5, 6 (20-pin header); USB 3.2
port 7 (Type-A)
VGA1 VGA connector
Table 1.5: Onboard LED
LED Description LED Definition
+5V_LED1 Power on LED Off:
Power off
On (Green):
System is on
+5V_SB_LED1 Standby LED Off:
No input AC Power
On (Green):
System is on, in sleep mode,
or in soft-off mode
BMC_HBLED1 BMC heartbeat LED Blinking (Green):
Controller is working normally
Table 1.4: Connectors

ASMB-831 User Manual 8
1.5 Block Diagram
Figure 1.3 Block Diagram
1.6 System Memory
ASMB-831 has 6 x 288-pin memory slots for DDR5 4400/4800 MHz memory mod-
ules, maximum 128 GB for each DIMM. ASMB-831 supports registered DIMM mem-
ory modules.

9 ASMB-831 User Manual
Chapter 1 Overview
1.7 Installation of Memory Modules
Memory performance is affected by different DIMM configurations. To reach optimal
memory interleaving, be sure to install identical DIMM types with the same size,
speed, and number of ranks on those memory slots corresponding to the correct pro-
cessor.
The following table indicates recommended DIMM configurations with a single EPYC
processor. Based on the guideline, you may adjust your memory configuration
according to your PCIe expansion card configuration.
The motherboard will support odd-numbered modules (1 or 3 modules installed) but
is unable to activate Dual Channel Technology. For great performance, a balanced
memory population is recommended.
Table 1.6: DIMM Configurations with a Single CPU
Quantity of memory installed
1246
DIMMA1 VVVV
DIMMB1 V
DIMMC1 V V
DIMMG1 VVV
DIMMH1 V
DIMMI1 V V
Note! 3, 5 DIMMs are not recommended DIMM populations.

ASMB-831 User Manual 10
1.8 Processor Installation
The ASMB-831 is designed for AMD EPYC 9004 Series processors.
1. Unscrew the one screw (shown above in red circle) on the top of the socket
retention mechanism (SRM), then rotate the Retention Frame and Rail Frame
(with external cap).
2. Remove the external cap by pulling upwards.
3. Install the carrier frame/CPU package to the rail frame, then remove the PnP
cover cap. Be very careful not to drop the PnP cover cap into the exposed con-
tact field during the removal process.