Advantech ASMB-925 Series User manual

User Manual
ASMB-925 Series
EATX Serverboard with Dual
LGA3647-P0 Intel® Xeon® CPUs,
12 DDR4 Slots, 5 PCIe x16, 1
PCIe x8, 1 PCI, 8 SATA3.0, 6 USB
3.0, Dual 10GbE, and IPMI

ASMB-925 User Manual ii
Copyright
The documentation and the software included with this product are copyrighted 2022
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
Intel and Pentium are trademarks of Intel® 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 products that have been repaired or altered by per-
sons other than repair personnel authorized by Advantech, or 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. However, 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 are billed according to the cost of replacement
materials, service time, and freight. Consult your dealer for more details.
If you believe that 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 relevant information readily available.
3. If your product is diagnosed as defective, obtain an RMA (return merchandise
authorization) 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 visibly on the outside of the package and ship it prepaid
to your dealer.
Part No. 2001092502 Edition 3
May 2022

iii ASMB-925 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 Advantech has come to be known. Your
satisfaction is our primary concern. Below is a guide to Advantech’s customer ser-
vices. To ensure you get the full benefit of our services, follow the instructions care-
fully.
Technical Support
We want you to get the maximum performance from your products. If you encounter
technical difficulties, we are here to help. For the most frequently asked questions,
you can find answers in the product documentation. These answers are normally
more detailed than the ones we can provide over the phone. So please consult 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 to 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
business day. We are happy to give advice about application requirements or specific
information regarding the installation and operation of any of our products.
Declaration of Conformity
FCC Class A
This equipment has been tested and found to comply with the limits for a Class A dig-
ital device, pursuant to part 15 of the FCC Rules. These limits are designed to pro-
vide 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. Opera-
tion of this equipment in a residential area is likely to cause harmful interference. In
this event, users are required to correct the interference at their own expense.

ASMB-925 User Manual iv
Initial Inspection
Before installing the serverboard, check to make sure that the following items have
been included in the shipment:
1 x ASMB-925 series EATX motherboard
1 x ASMB-925 series user manual
1 x Driver CD
2 x Serial ATA HDD data cables
1 x I/O port bracket
2 x CPU power cable (8P)
2 x SATA power cable
1 x Warranty card
2 x Heatsink clip for CPU
If any of the above items are missing or damaged, contact your distributor or sales
representative immediately. We have carefully inspected the ASMB-925 series
mechanically and electrically before shipment. It should be free of marks and
scratches and in perfect working order upon receipt. When unpacking the ASMB-925
serverboard, check it for signs of shipping damage. (For example, damaged box,
scratches, dents, etc.) If it is damaged or 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 arrangements to repair or replace the unit.
Ordering Information
Part Number Chipset HDD Expansion Slot GbE/10GbE
LAN
IPMI
ASMB-925T2-00A1 C622 8 x SATA3 5 x PCIe x16, 1 x PCIe
x8 (Gen 3.0), 1 x PCI 2/2 Yes
ASMB-925I-00A1 C621 8 x SATA3 5 x PCIe x16, 1 x PCIe
x8 (Gen 3.0), 1 x PCI 2/- Yes
ASMB-925-00A1 C621 8 x SATA3 5 x PCIe x16, 1 x PCIe
x8 (Gen 3.0), 1 x PCI 2/- -

v ASMB-925 User Manual
Contents
Chapter 1 Overview...............................................1
1.1 Introduction ............................................................................................... 2
1.2 Features.................................................................................................... 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 I/O ...................................................................... 6
Table 1.2: Onboard LAN LED Color Definition ............................ 6
Table 1.3: Jumpers...................................................................... 7
Table 1.4: Connectors ................................................................. 7
Table 1.5: Onboard LED.............................................................. 8
1.5 Block Diagram........................................................................................... 9
Figure 1.3 Block Diagram ............................................................ 9
1.6 System Memory ........................................................................................ 9
1.7 Memory Installation................................................................................. 10
Table 1.6: DIMM Configuration with Single CPU....................... 10
Table 1.7: DIMM Configuration with Dual CPU ......................... 11
Table 1.8: DCPMM Population Matrix ....................................... 11
1.8 Processor Installation.............................................................................. 12
Chapter 2 Connections.......................................15
2.1 Introduction ............................................................................................. 16
2.2 USB and LAN Ports (USB1~USB11, LAN1~LAN4)................................ 16
2.3 VGA Connector (VGA1).......................................................................... 17
2.4 Serial Ports (COM1, COM2) ................................................................... 17
2.5 PS2 Keyboard and Mouse Connector (KBMS1) ..................................... 18
2.6 CPU Fan Connector (CPUFAN0, CPUFAN1)......................................... 18
2.7 System Fan Connector (SYSFAN0~SYSFAN4) ..................................... 19
2.8 Front Panel Connector (JFP1, JFP2, JFP3) ........................................... 19
2.8.1 Power LED (JFP3) ...................................................................... 20
Table 2.1: ATX Power Supply LED Status ................................ 20
2.8.2 External Speaker (JFP2 Pins 1, 4, 7, 10).................................... 20
2.8.3 HDD LED Connector (JFP1 Pins 2 & 5) ..................................... 20
2.8.4 Reset Connector (JFP1 Pins 9 & 12).......................................... 20
2.8.5 SNMP Connector (JFP1 Pins 8 & 11)......................................... 21
2.9 Case Open (JCASE1)............................................................................. 21
2.10 SATA SGPIO (SGPIO1).......................................................................... 22
2.11 Front Panel LAN Indicator Connector (LANLED1).................................. 22
2.12 Serial ATA Interface (SATA0~SATA7).................................................... 23
2.13 PCIe and PCI Expansion Slot ................................................................. 24
2.14 Auxiliary Power Connector (ATXPWR1, ATX12V1, ATX12V2) .............. 25
2.15 HD Audio Interface Connector (HDAUD1) .............................................. 26
2.16 LPC Connector (LPC1) for Optional TPM ............................................... 26
2.17 CMOS Clear and ME Update Connector (JCMOS1, JME1) ................... 27
2.18 PMBUS Connector (PMBUS1)................................................................ 27
2.19 Front Panel SMBUS Connector (SMBUS1)............................................ 28
2.20 IPMI Module Connector (BMC_CN1, BMC_CN2)................................... 28
2.21 VOLT1 Connector (VOLT1) .................................................................... 29
2.22 GPIO Connector (GPIO1) ....................................................................... 29
2.23 Intel Virtual RAID (VROC1)..................................................................... 30
2.24 NVMe RAID LED Control (PEHP1)......................................................... 30

ASMB-925 User Manual vi
Chapter 3 AMI BIOS............................................ 31
3.1 Introduction ............................................................................................. 32
3.2 BIOS Setup ............................................................................................. 33
3.2.1 Main Menu .................................................................................. 33
3.2.2 Advanced BIOS Features Setup................................................. 34
3.2.3 Platform Configuration ................................................................ 54
3.2.4 Socket Configuration .................................................................. 62
3.2.5 Server Management ................................................................... 82
3.2.6 Security....................................................................................... 85
3.2.7 Boot ............................................................................................ 87
3.2.8 Save & Exit ................................................................................. 89
Chapter 4 Chipset Software Installation Utility 91
4.1 Before Beginning .................................................................................... 92
4.2 Introduction ............................................................................................. 92
4.2.1 Main Menu .................................................................................. 92
4.3 Windows Series Driver Setup ................................................................. 93
Chapter 5 VGA Setup ......................................... 95
5.1 Introduction ............................................................................................. 96
5.2 Windows Series Driver Setup ................................................................. 96
Chapter 6 LAN & USB 3.0 Configuration.......... 97
6.1 LAN Configuration................................................................................... 98
6.1.1 Introduction ................................................................................. 98
6.1.2 Features...................................................................................... 98
6.1.3 Installation................................................................................... 98
6.1.4 Windows Series Driver Setup ..................................................... 98
6.2 USB 3.0................................................................................................... 99
6.2.1 Introduction ................................................................................. 99
6.2.2 Windows Series Driver Setup ..................................................... 99
6.3 SATA & PCIe SSD RAID ........................................................................ 99
Appendix A Programming the Watchdog Timer101
A.1 Watchdog Timer Overview.................................................................... 102
A.2 Programming the Watchdog Timer ....................................................... 102
Appendix B I/O Pin Assignments ....................... 105
B.1 USB Header (USB7_8, USB9_10)........................................................ 106
Table B.1: USB Header ........................................................... 106
B.2 USB3.0 Header (USB5_6) .................................................................... 106
Table B.2: USB Header ........................................................... 106
B.3 VGA Connector (VGA1)........................................................................ 107
Table B.3: VGA Connector ...................................................... 107
B.4 RS-232 Interface (COM2) ..................................................................... 107
Table B.4: RS-232 Interface .................................................... 107
B.5 External Keyboard Connector (KBMS1) ............................................... 108
Table B.5: External Keyboard Connector ................................ 108
B.6 CPU and System Fan Power Connector (CPUFAN0~1,

vii ASMB-925 User Manual
SYSFAN0~SYSFAN4) .......................................................................... 108
Table B.6: Fan Power Connector............................................. 108
B.7 Power LED (JFP3) ................................................................................ 108
Table B.7: Power LED ............................................................. 108
B.8 External Speaker Connector (JFP2) ..................................................... 109
Table B.8: External Speaker Connector .................................. 109
B.9 Reset Connector (JFP1) ....................................................................... 109
Table B.9: Reset Connector..................................................... 109
B.10 HDD LED Connector (JFP1)................................................................ 109
Table B.10:HDD LED Connector .............................................. 109
B.11 ATX Soft Power Switch (JFP1) ............................................................ 110
Table B.11:ATX Soft Power Switch .......................................... 110
B.12 Front Panel SMBus Connector (SMBUS1) .......................................... 110
B.13 USB/LAN Ports (LAN1_USB1_2, LAN2_USB3_4) .............................. 110
Table B.12:USB Port................................................................. 110
Table B.13:Giga LAN 10/100/1000 BASE-T RJ-45 Port........... 110
B.14 Front Panel Audio Connector (HDAUD1)............................................. 111
Table B.14:Front Panel Audio Connector ................................. 111
B.15 Alarm Board Connector (VOLT1)......................................................... 111
Table B.15:Alarm Board Connector .......................................... 111
B.16 Case Open Connector (JCASE1) ........................................................ 111
Table B.16:Case Open Connector............................................ 111
B.17 Front Panel LAN LED Connector (LANLED1)...................................... 112
Table B.17:Front Panel LAN LED Connector ........................... 112
B.18 SATA SGPIO (SGPIO1)....................................................................... 112
B.19 LPC Connector (LPC1) ........................................................................ 112
B.20 Clear CMOS and Update ME Connector (JCMOS1, JME1)................ 113
B.21 PMBUS Connector (PMBUS1)............................................................. 113
B.22 GPIO Connector (GPIO1) .................................................................... 113

ASMB-925 User Manual viii

Chapter 1
1Overview

ASMB-925 User Manual 2
1.1 Introduction
Advantech’s ASMB-925 series are advanced serverboards aimed at server-grade
IPC applications that require high-performance computing and multiple expansion
slots. These serverboards feature Intel® Xeon® Scalable processors, up to 1.5TB of
DDR4 2133/2400/2666/2933 MHz memory, 5 x PCIe x16 (Gen 3), 1 x PCIe x8 (Gen
3), and 1 x PCI slot.
The ASMB-925 series serverboards are also equipped with dual Gigabit Ethernet
LAN ports (via a dedicated PCIe x1 bus) that offer a bandwidth of up to 250 MB/s,
eliminating network bottlenecks. LAN2 shares IPMI function, enabling remote control
for ASMB-925I/ASMB-925T2 SKU.
With the inclusion of an Intel® C621/C622 chipset, the ASMB-925 series supports 8 x
onboard SATA III interfaces, Intel® RSTe (Rapid Storage Technology Enterprise), and
RAID 0, 1, 10, and 5 (Windows only).
The system I/O includes 5 x USB 2.0 and 6 x USB 3.0 for integrating additional
peripherals and data storage modules.
1.2 Features
General
Intel® Xeon® scalable processor: Can support two Intel® Xeon® Platinum/
Gold/Silver/Bronze processors for up to 28-core processing
High-performance I/O: Provides dual 10 Gigabit LAN (for ASMB-925T2 SKU
only), dual Gigabit LAN, 5 x PCIe x16, 1 x PCIe x8, 8 x SATA connectors, 5 x
USB 2.0, and 6 x USB 3.0
Industrial-grade standard EATX form factor: Offers industrial-grade features,
such as a long product lifecycle, wide operating temperature range, and a
watchdog timer
IPMI 2.0 support: The ASMB-925I/ASMB-925T2 SKU is equipped with an
ASPEED 2500 BMC chip that supports IPMI 2.0 via LAN2
KVM over IP: Enables BIOS-level remote control of the ASMB-925I/ASMB-
925T2 SKU system from your computer
Note! 1. An IPMI module is included with the ASMB-925I/ASMB-925T2
SKU.
2. Refer to the release note for the specific Linux OS for information
regarding whether the Intel C621/C622 chipset supports SATA
RAID function.

3 ASMB-925 User Manual
Chapter 1 Overview
1.3 Specifications
Table 1.1: Specifications
Processor
CPU
Dual Intel® LGA3647-P0 Xeon® processor sockets
Supports 1st/2nd gen. Intel® Xeon® Scalable family, up to 28
cores
Supports up to 205 W processor TDP
System Memory
Memory Capacity
DDR4 memory bus
12 memory slots
Up to 1.5TB of memory
One DIMM per channel
Memory Type Supports DDR4 2133/2400/2666/2933 MHz RDIMM/LRDIMM mod-
ules
DIMM Sizes Each memory slot supports 4GB, 8GB, 16GB, 32GB, 64GB and
128GB modules
Memory Voltage 1.2 V
Error Detection Corrects single-bit errors
Detects double-bit errors (using ECC memory)
On-Board Devices
Chipsets Intel® C621/C622 PCH provides 20 x PCIe Gen3 lanes
Network Controllers
2 x Intel® I210-AT Gigabit Ethernet controllers connected to
C621/C622 via a PCIe Gen1 lane
Intel® X557-AT2 10 Gigabit Ethernet controller connected to
C622 via a PCIe Gen3 lane
Above network supports 10GbE Base-T and 10/100/1000 Base-
T, with RJ-45 output
VGA ASPEED AST2500/2510 controller with 64MB VGA memory provides
basic 2D VGA function
EC ITE IT8528E chip provides motherboard, keyboard, mouse, RS-232,
and hardware monitoring functions
BMC
(925I/925T2 SKUs)
One of Intel I210 Gigabit Ethernet and one of Intel X557 10GbE con-
nected to AST2500 for BMC remote management
Input/Output
Storage
8 x SATA provides 6 Gb/s bandwidth
RAID 0, 1, 5, 10 support (Windows only. For Linux support, refer
to item 2 of the in Section 1.1).
LAN 4 x RJ-45 LAN ports (2 x 10GbE + 2 x GbE LAN)
USB
4 x USB 3.0 ports at rear window
2 x USB 2.0 internal headers (4 ports)
1 x USB 3.0 internal header (2 ports)
1 x internal USB 2.0 (Type-A) port
VGA 1 x VGA port
Keyboard/Mouse 1 x PS/2 keyboard and mouse internal header (on board)
Serial Port/Header 1 x internal header (2 x 5P, 2.54 mm, pitch)
1 x external RS-232 port at rear window

ASMB-925 User Manual 4
Power Connector
System Power 1 x 24-pin SSI EPS 12 V power connector (input 12V, 5V, 3.3V, 5V
standby)
CPU Power 2 x 8-pin SSI EPS 12V power connector for CPU and memory power
(12V)
PCIe Slot Power 1 x 8-pin 12V power connector for PCIe, 12 V input
Expansion Slots
PCI-Express
5 x PCI-e x16 (Gen3 x16 link)
–PCIEX16_SLOT2 (from CPU 1)
–PCIEX16_SLOT3 (from CPU 1)
–PCIEX16_SLOT4 (from CPU 0)
–PCIEX16_SLOT5 (from CPU 1)
–PCIEX16_SLOT6 (from CPU0)
1 x PCI-e x8 (Gen3 x8 link)
–PCIEX8_SLOT7 (from CPU 0)
PCI 1 x PCI
–PCI_SLOT1 (from IT8896 and PCH)
System BIOS
BIOS Type 128 Mb SPI Flash EEPROM with AMI BIOS
PC Health Monitoring
Voltage Monitors for CPU cores, +3.3 V, +5 V, +12 V, +5 V Standby, VBAT
Fan
2 x 4-pin heads for CPU cooler, 5 x 4-pin headers for system fan
All fans feature tachometer status monitoring
Thermal control for all fan connectors
Temperature Monitoring for CPU (PECI)
Monitoring for system external thermal sensor
Other Features
(Case Open)
Chassis intrusion detection
Chassis intrusion header
Operating Environment/Compliance
RoHS RoHS-compliant 6/6 Pb free
Environmental
Operating temperature: 0 ~ 40° C/32 ~ 104° F
Storage temperature: -40 to 85° C/-40 ~ 185 ° F
Operating Relative Humidity: 10% to 90% (non-condensing)
Storage Relative Humidity: 10% to 95% (non-condensing)
Table 1.1: Specifications

5 ASMB-925 User Manual
Chapter 1 Overview
1.4 Board Layout, Jumpers, and Connectors
Connectors on the ASMB-925 Series are linked to external devices such as hard disk
drives. ASMB-925 serverboards also feature a number of jumpers that are used to
configure the system for specific applications.The functions of each jumper and con-
nector are listed in the tables below.
Instructions for setting jumpers are provided in later sections of this chapter. Chapter
2 provides instructions for connecting external devices to ASMB-925 serverboards.
Figure 1.1 Board Layout
VGA1_COM1
LAN1_USB1_2
LAN2_USB3_4
LAN34
BMC_CN1
SYSFAN4
BMC_CN2
SPI_SKT1_U512
EC_SMBUS1
PCI_SLOT1
HDAUD1
PCIEX16_SLOT2
PCIEX16_SLOT3
PCIEX16_SLOT4
PCIEX16_SLOT5
PCIEX16_SLOT6
COM2
KBMS1
GPIO1
SMBUS1
PCIEX8_SLOT7
DIMMI1
DIMMH1
DIMMG1
DIMMJ1
DIMMK1
DIMML1
CPU1
CN1
SGPIO1
USB11
JWDT1
LANLED1
JME1
SATA0~7
USB5_6
USB7_8
USB9_10
SLOT12V1
JFP1/JFP2/JFP3
SYSFAN0~3
CPUFAN0
DIMMF1
DIMME1
DIMMD1
PMBUS1
CPUFAN1
ATX12V2
DIMMA1
DIMMB1
DIMMC1
ATXPWR1
CPU0
PCN1
SYS_LED1
LPC1
ATX12V1
VOLT1
SPI_CN1
BIOS_SKT1
PSON1
PEHP1
JTHR_SEL1
EX_THR1
JPCICLK1
JCMOS1
JCASE1
VROC1
BH2

ASMB-925 User Manual 6
Figure 1.2 Rear I/O
Table 1.2: Onboard LAN LED Color Definition
10/100/1000 Mbps LAN Link/Activity LED Scheme
LAN1 & LAN2 (1G)
Left LED Right LED
10 Mbps Link
Active
Off
Off
Green
Blinking green
100 Mbps Link
Active
Amber
Amber
Green
Blinking green
1000 Mbps Link
Active
Green
Green
Green
Blinking green
No Link Off Off
1/10 Gbps LAN Link/Activity LED Scheme
LAN3 & LAN4 (10G)
Left LED Right LED
1G Mbps Link
Active
Amber
Amber
Green
Blinking green
10G Mbps Link
Active
Green
Green
Green
Blinking green
ASMB-925T2-00A1
ASMB-925-00A1
ASMB-925I-00A1
LAN4
LAN3LAN2
LAN1
COM1
USB34USB12VGA1
LAN2 (sharing LAN with BMC)LAN1COM1
USB34USB12VGA1
(sharing LAN with BMC)

7 ASMB-925 User Manual
Chapter 1 Overview
Table 1.3: Jumpers
Label Function Default
JCMOS1 CMOS clear 1-2
JME1 ME update 1-2
JWDT1 Watchdog function enable 1-2
PSON1 AT (1-2)/ATX (2-3) mode 2-3
JCASE1 Chassis case open alarm disable 1-2
JTHR_SEL On board (1-2)/external (2-3) thermistor 1-2
JPCICLK1 PCI clock selection for 33 MHz (2-3)/66 MHz (1-2) 2-3
Keep CMOS data/
Disable ME update/
Clear CMOS data/
Enable ME update/
Table 1.4: Connectors
Label Function
ATXPWR1 ATX 24 pin main power connector
ATX12V1 Processor power connector (for CPU0)
ATX12V2 Processor power connector (for CPU1)
SLOT12V1 For PCIe slot 12V input only
SATA0~SATA7 Serial ATA0~7
USB7_8, USB9_10 USB 2.0 header 7, 8, 9, 10
USB11 USB 2.0 port 11 (Type-A)
USB1_2, USB3_4,
USB5_6 USB 3.0 port 1, 2, 3, 4; USB 3.0 port 5, 6 (20-pin header)
PCI_SLOT1 PCI slot
PCIEX16_SLOT2 PCIE x16 slot
PCIEX16_SLOT3 PCIE x16 slot
PCIEX16_SLOT4 PCIE x16 slot
PCIEX16_SLOT5 PCIE x16 slot
PCIEX16_SLOT6 PCIE x16 slot
PCIEX8_SLOT7 PCIE x8 slot
DIMMA1~DIMML1 DDR4 slot
CPUFAN0, CPUFAN1 CPU FAN connector
SYSFAN0~SYSFAN4 System FAN connector
LAN1, LAN2 GbE LAN connector
LAN34 10GbE LAN connector
VGA1_COM1 VGA and COM connector
COM2 Serial port: RS-232
KBMS1 External keyboard and mouse connector (6 pin)
BIOS_SKT1 BIOS ROM
LANLED1 LAN LED extension connector
SMBUS1 Front panel SMBus header
123
123

ASMB-925 User Manual 8
BMC_CN1, BMC_CN2 IPMI module header
GPIO1 GPIO connector
SGPIO1 SATA SGPIO header
HDAUD1 Audio header
JFP1, JFP2, JFP3 Front panel header
PMBUS1 Power supply SMBbus I2C header
EX_THR1 For external thermistor cable use
SYS_LED1 For optional system LED indicator
LPC1 Low pin count connector for Advantech designed LPC modules
VOLT1 Alarm Board Power connector
SPI_CN1 SPI flash card pin header
PEHP1 NVMe RAID LED control
BH2 Battery connector
VROC1 VROC hardware key header
CN1 CPLD code update header
PCN1 CPU power code update header
SPI_SKT1_U512 EC ROM
Table 1.5: Onboard LED
LED Description LED Definition
5V_LED1 Power on LED Off:
Power off
On (Green):
System is On
5VSB_LED1 Standby LED Off:
No input AC Power
On (Green):
System is ON, in sleep mode,
or in soft-off mode
LED3
BMC heartbeat LED
(ASMB-925I/ASMB-
925T2 SKU Only)
Blinking (Green):
Controller is working normally
Table 1.4: Connectors

9 ASMB-925 User Manual
Chapter 1 Overview
1.5 Block Diagram
Figure 1.3 Block Diagram
1.6 System Memory
The ASMB-925 Series serverboards have twelve 288-pin memory slots for DDR4
2133/2400/2666/2933 MHz memory modules, with maximum capacity of 1.5TB
(Maximum 128GB for each DIMM). ASMB-925 supports registered DIMM memory
modules.
PCI BUS
PCI Slot
Intel LGA 3647-P0
Xeon® Scalable
Processors
(CPU1)
Intel LGA 3647-P0
Xeon® Scalable
Processors
(CPU0)
UPI
UPI
Channel 0
ECC DDR4 2133/2400/2666/2933
Channel 1
ECC DDR4 2133/2400/2666/2933
Channel 2
ECC DDR4 2133/2400/2666/2933
Channel 3
ECC DDR4 2133/2400/2666/2933
Channel 4
ECC DDR4 2133/2400/2666/2933
Channel 5
ECC DDR4 2133/2400/2666/2933
Channel 0
ECC DDR4 2133/2400/2666/2933
Channel 1
ECC DDR4 2133/2400/2666/2933
Channel 2
ECC DDR4 2133/2400/2666/2933
Channel 3
ECC DDR4 2133/2400/2666/2933
Channel 4
ECC DDR4 2133/2400/2666/2933
Channel 5
ECC DDR4 2133/2400/2666/2933
PCIe x16 Slot PCIe Gen3 x16
Slot 2
Slot 1
PCIe x16 Slot PCIe Gen3 x16
Slot 3
PCIe x16 Slot PCIe Gen3 x16
Slot 5
PCIe x16 Slot
PCIe Gen3 x16 Slot 4
PCIe x16 Slot
PCIe Gen3 x16 Slot 6
PCIe x8 Slot
PCIe Gen3 x8 Slot 7
DMI Gen3 x4
PCIEUP Gen3 x8
SATA3.0
Intel C621/C622 PCH
KR 10GbE
LAN3/4: X557
8 x SATA3.0
PCIE x1
PCI Bridge
IT8896
USB 2.0
5 x USB2.0
(4 Header / 1 Type A)
USB 3.0
6 x USB3.0
(2 Rear / 4 Header)
HD Audio
HD Conn.
PCIe Gen1 x1 GbE LAN1: I210
MDI RJ45
1G/10G
MDI RJ45
1G/10G
MDI RJ45
10M/100M/1G
PCIe Gen1 x1
NC-SI
GbE LAN2: I210 MDI
NC-SI
RJ45
10M/100M/1G
USB 2.0
PCIe Gen2 x1 BMC
AST2500
SPI SPI Flash 32MB
DDR4 DRAM
RGB VGA Conn.
SPI BUS
LPC Conn.
EC
IT8528E
SPI
BIOS
2 x RS-232 Header/Conn.
8 bit GPIO Pin Header
PS/2 KB, MS
7 x FAN Conn.
256Mb
LPC BUS
LPC BUS

ASMB-925 User Manual 10
1.7 Memory Installation
Memory performance is affected by different DIMM configurations. To reach optimal
memory interleaving, be sure to install identical DIMM types of the same size, speed,
and number of ranks on the memory slots corresponding to the correct processor.
The following table lists recommended DIMM configurations with a single and dual
processor. Based on the guideline, users can adjust the memory configuration
according to the PCIe expansion card configuration.
Intel® Xeon® Scalable (82xx/62xx/52xx/4215) processors support Intel® Optane™
DC persistent memory modules (DCPMM).
Table 1.6: DIMM Configuration with Single CPU
Quantity of Memory Installed
CPU0 1 2 3 4 5 6
DIMMA1 v v v v v
DIMMB1 v v v v
DIMMC1 v v
DIMMD1 v v
DIMME1 v v
DIMMF1 v
DIMMG1
DIMMH1
DIMMI1
DIMMJ1
DIMMK1
DIMML1
Note! A DIMM population of 5 is not recommended.

11 ASMB-925 User Manual
Chapter 1 Overview
AD: App Direct Mode; MM: Memory Mode; AD+MM: Mixed Mode.
DRAM1: RDIMM, 3DS RDIMM, LRDIMM, 3DS LRDIMM
DRAM2: RDIMM
DRAM3: RDIMM; 3DS RDIMM; LRDIMM
Andy capacity of DCPMM is allowed
Table 1.7: DIMM Configuration with Dual CPU
Quantity of Memory Installed
CPU0 &
CPU1 123456789101112
DIMMA1 v v v v v v
DIMMB1 v v v v v
DIMMC1 v v v
DIMMD1 v v v
DIMME1 v v v
DIMMF1 v v
DIMMG1 v v v v v v
DIMMH1 v v v v v
DIMMI1 v v
DIMMJ1 v v v
DIMMK1 v v v
DIMML1 v
Note! DIMM populations of 1, 3, 5, 7, 9, and 11 are not recommended when
dual CPUs are installed.
Table 1.8: DCPMM Population Matrix
Symmetric Population within CPU0
Modes DIMMF1 DIMME1 DIMMD1 DIMMC1 DIMMB1 DIMMA1
AD DCPMM DRAM1 DRAM1 DCPMM DRAM1 DRAM1
MM DCPMM DRAM1 DRAM1 DCPMM DRAM1 DRAM1
AD+MM DCPMM DRAM3 DRAM3 DCPMM DRAM3 DRAM3
Symmetric Population within CPU1
Modes DIMML1 DIMMK1 DIMMJ1 DIMMI1 DIMMH1 DIMMG1
AD DCPMM DRAM1 DRAM1 DCPMM DRAM1 DRAM1
MM DCPMM DRAM1 DRAM1 DCPMM DRAM1 DRAM1
AD+MM DCPMM DRAM3 DRAM3 DCPMM DRAM3 DRAM3

ASMB-925 User Manual 12
1.8 Processor Installation
ASMB-925 Series serverboards are designed for Intel® Xeon® Scalable processors.
1. Remove dust cover.
2. Install CPU on CPU clip and align it with the pin-1 mark.