Chassis Plans ATXN-5520 Use and care manual

ATXN-5520 / ATXW-5520
S6900-xxx / S7026-xxx
Revision B
TECHNICAL REFERENCE
Intel® Xeon® E5500-series / Intel® Xeon® E5600-series
Quad Core
PROCESSOR-BASED
Extended ATX Motherboards

WARRANTY
The following is an abbreviated version of Chassis Plans‟ warranty policy for Industrial Motherboard
products. For a complete warranty statement, contact Chassis Plans or visit our website at www.Chassis-
Plans.com.
Chassis Plans Industrial Motherboard products are warranted against material and manufacturing defects
for five years from date of delivery to the original purchaser. Buyer agrees that if this product proves
defective Chassis Plans is only obligated to repair, replace or refund the purchase price of this product at
Chassis Plans‟ discretion. The warranty is void if the product has been subjected to alteration, neglect,
misuse or abuse; if any repairs have been attempted by anyone other than Chassis Plans; or if failure is
caused by accident, acts of God, or other causes beyond the control of Chassis Plans. Chassis Plans
reserves the right to make changes or improvements in any product without incurring any obligation to
similarly alter products previously purchased.
In no event shall Chassis Plans be liable for any defect in hardware or software or loss or inadequacy of
data of any kind, or for any direct, indirect, incidental or consequential damages arising out of or in
connection with the performance or use of the product or information provided. Chassis Plans liability
shall in no event exceed the purchase price of the product purchased hereunder. The foregoing limitation
of liability shall be equally applicable to any service provided by Chassis Plans
RETURN POLICY
Products returned for repair must be accompanied by a Return Material Authorization (RMA) number,
obtained from Chassis Plans prior to return. Freight on all returned items must be prepaid by the customer,
and the customer is responsible for any loss or damage caused by common carrier in transit. Items will be
returned from Chassis Plans via Ground, unless prior arrangements are made by the customer for an alter-
native shipping method
To obtain an RMA number, call us at [phone]. We will need the following information:
Return company address and contact
Model name and model # from the label on the back of the product
Serial number from the label on the back of the product
Description of the failure
An RMA number will be issued. Mark the RMA number clearly on the outside of each box, include a
failure report for each board and return the product(s) to our San Diego, CA facility:
Chassis Plans
10123 Carroll Canyon Rd.
San Diego, CA 92131
Attn: Repair Department
Contact Chassis Plans for our complete service and repair policy.

TRADEMARKS
IBM, PC/AT, VGA, EGA, OS/2 and PS/2 are trademarks or registered trademarks
of International Business Machines Corp.
AMI and AMIBIOS are trademarks of American Megatrends Inc.
Intel, Xeon, Intel Quick Path Interconnect, Intel Hyper-Threading Technology and Intel Virtualization
Technology are trademarks or registered trademarks of Intel Corporation.
MS-DOS and Microsoft are registered trademarks of Microsoft Corp.
PICMG, SHB Express and the PICMG logo are trademarks or registered trademarks
of the PCI Industrial Computer Manufacturers Group.
PCI Express is a trademark of the PCI-SIG
All other brand and product names may be trademarks or registered trademarks
of their respective companies.
LIABILITY DISCLAIMER
This manual is as complete and factual as possible at the time of printing; however, the information in this
manual may have been updated since that time. Chassis Plans reserves the right to change the functions,
features or specifications of their products at any time, without notice.
Copyright © 2010 by Chassis Plans. All rights reserved.
E-mail: [e-mail]
Web: www.Chassis-Plans.com
Chassis Plans
10123 Carroll Canyon Road • San Diego, CA 92131
Sales: [phone] • Fax: [phone] • Web: www.Chassis-Plans.com

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Chassis Plans i
Table of Contents
CHAPTER 1 SPECIFICATIONS ........................................................................................................... 1-1
Introduction ................................................................................................................................................... 1-1
Dual-Processor ATXN-5520 Models ............................................................................................................. 1-1
Dual-Processor ATXW-5520Models ............................................................................................................. 1-2
Single-Processor ATXN-5520 Models .......................................................................................................... 1-3
Single-Processor ATXW-5520Models .......................................................................................................... 1-3
Features ......................................................................................................................................................... 1-4
ATXN-5520 (S6900-xxx) – Extended ATX Motherboard Block Diagram ..................................................... 1-5
ATXW-5520(S7026-xxx) – Extended ATX Motherboard Block Diagram ..................................................... 1-6
ATXW-5520(S7026-xxx) – Extended ATX Motherboard Layout .................................................................. 1-7
ATXN-5520 (S6900-xxx) / ATXW-5520(S7026-xxx) – Rear I/O Plate Dimension Drawing .......................... 1-8
Processor ...................................................................................................................................................... 1-9
Bus Interface ................................................................................................................................................. 1-9
Data Path ....................................................................................................................................................... 1-9
Serial Interconnect & Bus Speeds ............................................................................................................... 1-9
Quick Path Interconnect Speeds ................................................................................................................. 1-9
Memory Interfaces ........................................................................................................................................ 1-9
DMA Channels............................................................................................................................................... 1-9
Interrupts ....................................................................................................................................................... 1-9
BIOS (Flash) .................................................................................................................................................. 1-9
Cache Memory .............................................................................................................................................. 1-9
DDR3 Memory ............................................................................................................................................. 1-10
PCI Express Option Card Slots .................................................................................................................. 1-10
PCI Option Card Slot ................................................................................................................................... 1-11
Universal Serial Bus (USB) ......................................................................................................................... 1-11
Video Interface ............................................................................................................................................ 1-11
Ethernet Interfaces ..................................................................................................................................... 1-11
Serial ATA/300 Ports ................................................................................................................................... 1-11
Audio Interface ............................................................................................................................................ 1-11
Trusted Platform Module (TPM 1.2) ........................................................................................................... 1-11
Battery ......................................................................................................................................................... 1-12
System BIOS Setup Utility .......................................................................................................................... 1-12
Power Requirements .................................................................................................................................. 1-12
Temperature/Environment .......................................................................................................................... 1-12
Mechanical .................................................................................................................................................. 1-13
UL Recognition ........................................................................................................................................... 1-13
Configuration Jumpers ............................................................................................................................... 1-13
Ethernet LEDs and Ethernet Connectors .................................................................................................. 1-14
Motherboard Status LEDs .......................................................................................................................... 1-14
Motherboard Connectors ........................................................................................................................... 1-17
CHAPTER 2 PCI EXPRESS® AND PCI OPTION CARD SLOTS ........................................................ 2-1
Introduction ................................................................................................................................................... 2-1
PCI Express Links ......................................................................................................................................... 2-1
Motherboard PCIe Card Slot Configurations ............................................................................................... 2-2
Motherboard PCI Card Slot Configuration .................................................................................................. 2-2
CHAPTER 3 MOTHERBOARD INSTALLATION ................................................................................. 3-1
Introduction ................................................................................................................................................... 3-1
Recommended Board Handling Precautions .............................................................................................. 3-1
Chassis Mounting ......................................................................................................................................... 3-1
Memory Installation ...................................................................................................................................... 3-3
Rear I/O Connectors ..................................................................................................................................... 3-4
Front I/O Header ............................................................................................................................................ 3-4
Connecting Power ........................................................................................................................................ 3-5
Fan Headers .................................................................................................................................................. 3-5
SATA II 300 Connectors ............................................................................................................................... 3-6
RS-232 Serial Port Headers .......................................................................................................................... 3-6
On-board USB Header .................................................................................................................................. 3-7
Intruder Alert and Speaker Headers ............................................................................................................ 3-8
Optional IPMI and TPM 1.2 Headers ............................................................................................................. 3-8
Password Clear Jumper ............................................................................................................................... 3-9
CMOS Clear Jumper ................................................................................................................................... 3-10
System Fan Speed Control Jumpers ......................................................................................................... 3-10

ATXN-5520 / ATXW-5520 Technical Reference
ii Chassis Plans
PSON Soft Control Jumper ........................................................................................................................ 3-11
Ethernet LAN LEDs ..................................................................................................................................... 3-12
Processor Power LEDs ............................................................................................................................... 3-12
Processor Thermal Throttling LEDs .......................................................................................................... 3-13
CAT LED ...................................................................................................................................................... 3-13
IOH Thermal Throttling LED ....................................................................................................................... 3-14
PRCHT “Processor Hot” LED ..................................................................................................................... 3-14
Port 80 Post Code LEDs ............................................................................................................................. 3-15
S3, S4 and S5 Sleep State LEDs ................................................................................................................ 3-15
Power Status LEDs ..................................................................................................................................... 3-16
LED Number ................................................................................................................................................ 3-16
CHAPTER 4 SYSTEM BIOS ................................................................................................................. 4-1
BIOS Operation ............................................................................................................................................. 4-1
Running AMIBIOS Setup .............................................................................................................................. 4-4
BIOS Setup Utility Main Menu ...................................................................................................................... 4-5
Security Setup ............................................................................................................................................. 4-12
Boot Sector Virus Protection ..................................................................................................................... 4-15
Exit Menu ..................................................................................................................................................... 4-17
CHAPTER 5 ADVANCED SETUP ........................................................................................................ 5-1
Advanced Setup ............................................................................................................................................ 5-1
CPU Configuration Setup ............................................................................................................................. 5-5
IDE Configuration ......................................................................................................................................... 5-9
IDE Device Setup ........................................................................................................................................ 5-13
SuperIO Configuration ................................................................................................................................ 5-17
USB Configuration ...................................................................................................................................... 5-19
ACPI Configuration ..................................................................................................................................... 5-21
Advanced ACPI Configuration ................................................................................................................... 5-22
Chipset ACPI Configuration ....................................................................................................................... 5-24
AHCI Configuration ..................................................................................................................................... 5-26
AHCI Port Configuration ............................................................................................................................. 5-28
I/O Virtualization .......................................................................................................................................... 5-30
Intel TXT(LT) Configuration ........................................................................................................................ 5-31
Intel VT-d Configuration ............................................................................................................................. 5-33
MPS Configuration ...................................................................................................................................... 5-35
PCI Express Configuration ......................................................................................................................... 5-36
Trusted Computing ..................................................................................................................................... 5-39
CHAPTER 6 PLUG AND PLAY SETUP ............................................................................................... 6-1
Plug and Play Setup.............................................................................................. Error! Bookmark not defined.
CHAPTER 7 BOOT SETUP .................................................................................................................. 7-1
Boot Setup..................................................................................................................................................... 7-1
Boot Setting Configuration .......................................................................................................................... 7-3
Boot Device Priority ...................................................................................................................................... 7-7
Hard Disk Drives ........................................................................................................................................... 7-9
Removable Drives ....................................................................................................................................... 7-11
CD/DVD Drives ............................................................................................................................................ 7-13
CHAPTER 8 CHIPSET SETUP ............................................................................................................. 8-1
Chipset Setup ................................................................................................................................................ 8-1
CPU Bridge Configuration ............................................................................................................................ 8-4
North Bridge Configuration .......................................................................................................................... 8-8
South Bridge Configuration ....................................................................................................................... 8-10
APPENDIX A BIOS MESSAGES ........................................................................................................... A-1
BIOS Beep Codes ......................................................................................................................................... A-1
BIOS Beep Code Troubleshooting ............................................................................................................... A-1
BIOS Error Messages ................................................................................................................................... A-2
Bootblock Initialization Code Checkpoints ................................................................................................. A-6
Bootblock Recovery Code Checkpoints ...................................................................................................... A-7
POST Code LEDs .......................................................................................................................................... A-8
DIM Code Checkpoints ............................................................................................................................... A-11
Additional Checkpoints .............................................................................................................................. A-12

ATXN-5520 / ATXW-5520 Technical Reference
Chassis Plans iii
HANDLING PRECAUTIONS
WARNING: This product has components that may be damaged by electrostatic discharge.
To protect your motherboard from electrostatic damage, be sure to observe the following precautions when
handling or storing the board:
 Keep the motherboard in its static-shielded bag until you are ready to perform your installation.
 Handle the motherboard by its edges.
 Do not touch the I/O connector pins.
 Do not apply pressure or attach labels to the motherboard.
 Use a grounded wrist strap at your workstation or ground yourself frequently by touching the
metal chassis of the system before handling any components. The system must be plugged into an
outlet that is connected to an earth ground.
 Use antistatic padding on all work surfaces.
 Avoid static-inducing carpeted areas.
RECOMMENDED BOARD HANDLING PRECAUTIONS
This motherboard has components on both sides of the PCB. Some of these components are extremely
small and subject to damage if the board is not handled properly. It is important for you to observe the
following precautions when handling or storing the board to prevent components from being damaged or
broken off:
 Handle the board only by its edges.
 Store the board in padded shipping material or in an anti-static board rack.
 Do not place an unprotected board on a flat surface.

ATXN-5520 / ATXW-5520 Technical Reference
iv Chassis Plans
Before You Begin
INTRODUCTION
It is important to be aware of the system considerations listed below before installing your ATXN-5520
(S6900-xxx) motherboard. Overall system performance may be affected by incorrect usage of these
features.
MECHANICAL LAYOUT AND CHASSIS INSTALLATION
Chassis Plans‟ ATXN-5520 /ATXW-5520Extended ATX motherboards comply with the SSI-EEB
Enterprise Bay Specification 2008, Revision 1.0. This specification defines the Extended ATX
motherboard form factor including the board‟s mechanical dimensions, mounting hole locations, option
card slot locations, I/O connector placements, maximum component heights and the motherboard‟s I/O
plate dimensions.
Note: The I/O plate for the motherboard is packed with the motherboard inside its own separate bag. The
I/O plate needs to be installed into the standard chassis opening to cover the gaps between the
motherboard‟s I/O connectors and ensure ESD protection.
Chassis that adhere to the SSI-EEB industry standard should be used with the ATXN-5520 motherboard.
See the ATXN-5520/ATXW-5520dimension diagram in the Chapter 1 - Specifications for more details.
12V AUX POWER REQUIREMENTS
Both 12V AUX motherboard connectors (P15 and P16) must be connected to the system power supply to
ensure proper board operation.
DDR3 MEMORY
The DDR3 memory modules used in the ATXN-5520 must be ECC registered (72-bit) DDR3 DIMMs and
must be PC3-10600, PC3-8500 or PC3-6400 compliant.
NOTES:
 All memory modules must have gold contacts.
 Low voltage (DDR3L) DIMMs are not supported.
 To maximize memory interface speed, populate each memory channel with DDR3
DIMMs having the same interface speed.
 Populate the memory channels starting with the DIMM socket farthest from the CPU.
Work you way toward the processor populating the DIMM sockets labeled with an “A”
first followed by the “B” labeled sockets.
 If populating a memory channel with a Quad-rank and a Single- or Dual-rank DIMM
place the Quad-rank DIMM farthest from the processor.
The motherboard will support DIMMs with different speeds, but the memory channel interface will operate
at the speed of the slowest DIMM.
SATA RAID OPERATION
The ICH10R I/O Controller Hub used on the motherboard features Intel® Matrix Storage Technology,
which allows the ICH10R‟s SATA controller to be configured as a RAID controller supporting RAID 0, 1,
5 and 10 implementations. To configure the SATA ports as RAID drives or to use advanced features of the

ATXN-5520 / ATXW-5520 Technical Reference
Chassis Plans v
ICH10R, you must install the Intel® Matrix Storage Manager. A link to the software is available under the
Downloads tab on the ATXN-5520 or the ATXW-5520 product detail web pages located on Chassis Plans‟
website.

ATXN-5520 / ATXW-5520 Technical Reference
vi Chassis Plans
SYSTEM FAN CONNECTION OPTIONS
The motherboard offers four chassis fan connections (P25, P26, P27 and P30) to ease the integration task of
implementing a systems‟ overall cooling solution. The system fans will run at full speed with the factory
default closed position configuration for motherboard jumpers W7, W6, W5 and W3. Alternatively, these
jumper configurations may be opened in order to control fan speed via the system‟s ACPI soft control
signal commands. The Advanced Setup chapter in the manual contains information on the motherboard‟s
ACPI BIOS settings.
CPU FAN CONNECTION OPTIONS
The processor cooling fan connections are P28 for CPU1 and P31 for CPU2. Like the system fan
connectors, the factory default configurations for the CPU fan jumpers are closed for full speed fan
operation. CPU fan control can be given over to the system‟s ACPI soft control lines by removing jumpers
W2 and W4. Even though the processors have internal logic to prevent excessive temperatures from
damaging the CPUs, care must always be used when electing to control a CPU‟s cooling fan speed with the
system‟s ACPI control signals. The Advanced Setup chapter in the manual contains information on the
motherboard‟s ACPI BIOS settings
PCI EXPRESS OPTION CARD SLOT CONFIGURATIONS
There are six PCI Express® option card slots supported on Chassis Plans‟ Extended ATX motherboards.
Five of these slots (PCIe7, PCIe6, PCIe5, PCIe4 and PCIe2) support either PCI Express 2.0 or 1.1 option
cards. PCIe3 is a PCI Express slot dedicated to supporting PCIe 1.1 option cards. Slots 2, 4 and 6 are x16
mechanical slots driven with x8 PCIe electrical links. Slots 3, 5, and 7 are x8 mechanical slots driven with
x4 PCIe electrical links.
PCI CARD SLOT CONFIGURATION
There is an additional PCI slot supported on the motherboard to enable a mix of option card bus
technologies. The PCI card slot is labeled PCI-1 and the slot is configured with a 32-bit/33MHz parallel
PCI bus interface. The motherboard‟s PCI slot supports 5V or Universal PCI cards.
ENVIRONMENTAL AND SYSTEM AIRFLOW CONSIDERATIONS
Chassis Plans has performed many hours of thermal testing on the motherboard under a variety of
simulated system conditions using different processor options. The system design using the ATXN-5520
or ATXW-5520 should provide a chassis airflow of 350LFM over the motherboard. The steady state
operating temperature range specification for the Chassis Plans ATXN-5520 motherboard is 0° C to 50° C
(32° F to 122° F).
Chassis Plans‟ thermal testing methodology is engineering driven, verifiable and conservative in order to
ensure long-lasting and reliable system operations under varying environmental conditions. We have
validated proper board operation with typical temperature excursions 10% above the motherboard‟s stated
maximum operating temperature. Operating temperature excursions below 0° C have also been verified in
Chassis Plans‟ labs. The amount and duration of these extended temperature excursions are application
dependent. Contact Chassis Plans to discuss your specific system‟s environmental parameters should you
need to exceed our published operating temperature range specification.
FOR MORE INFORMATION
For more information on any of these features, refer to the appropriate sections ATXN-5520 / WTM2026
Technical Reference Manual (#87-006903-000 / #87-007029-000). The latest manual revision may be
found on Chassis Plans‟ website - www.Chassis-Plans.com.

ATXN-5520 / ATXW-5520 Technical Reference Specifications
1-1 Chassis Plans
Chapter 1 Specifications
Introduction
The ATXN-5520 and ATXW-5520are long-life, Extended ATX motherboards that support one or two,
dual/quad-core, Intel® Xeon® 5500 Series and quad/six-core Intel® Xeon® 5600 Series processors
respectively. The series 5500 CPUs used on the ATXN-5520 are based on the Nehalem-EP micro-
architecture while the series 5600 processors utilized on the ATXW-5520use the Westmere-EP micro-
architecture. The Westmere-EP processors feature Intel® TXT support and Intel® Hyper-Threading. Both
processor types feature three dual-channel DDR3 direct memory interfaces into each processor. All twelve
(12) DDR3 DIMM slots are available for use in a dual-processor board configuration and can theoretically
support up to 144GB of total system memory. However, the market realities for PC3-10600, PC3-8500 or
PC3-6400 memory modules limit this maximum capacity to 96GB. The maximum amount of system
memory supported is cut in half with a single processor motherboard configuration. The ATXN-
5520/ATXW-5520motherboard architecture is based upon the proven Intel® 5520 (i.e. Tylersburgh) chipset
with the Intel® ICH10R I/O Controller Hub. Trusted Computing applications are supported by the
motherboard‟s built-in TPM 1.2 component and the TPM header. A Graphic Processing Unit (GPU) provides
an additional 8MB of dedicated video memory that enables a system to support WUXGA video resolutions
(i.e. 1920 x 1200 pixels) at a 64k color depth on the board‟s built-in video port. Standard audio ports are
available on the motherboard‟s I/O plate along with four 10/100/1000Base-T Ethernet interfaces and eight
USB 2.0 ports. Additional PS/2 mouse and keyboard ports for legacy input devices are also available for use
on the I/O plate. On-board headers support two RS-232 serial ports, two additional USB 2.0 interfaces and
six SATA/300 ports. These SATA/300 ports support either independent SATA drives or RAID 0, 1, 5 and 10
drive arrays.
Here is a listing of all the possible Intel® processors supported on Chassis Plans‟ ATXN-5520 and ATXW-
5520embedded motherboards. The Chassis Plans model number for your motherboard indicates the
processors that were installed on the motherboard at our factory. This information may prove useful for any
component driver support questions that may arise regarding your final system configuration.
Dual-Processor ATXN-5520 Models
Model #
Model Name
Speed
Intel® CPU Brand Number
Two Intel Xeon 5500 Series Processors – Dual Core, 4.8GT/s, 4MB cache
S6900-005
NTM/1.86DM
1.86GHz
E5502
S6900-007
NTM/2.20DM
2.20GHz
E5503
Two Intel Xeon 5500 Series LV Processors – Dual Core + Hyper-Threading, 5.86GT/s, 8MB cache
S6900-030
NTM/2.0DLN
2.0GHz
L5508 (embedded)
Two Intel Xeon 5500 Series Processors – Quad Core, 4.8GT/s, 4MB cache
S6900-106
NTM/2.0QM
2.0GHz
E5504 (embedded)
S6900-107
NTM/2.13QM
2.13GHz
E5506
S6900-108
NTM/2.26QM
2.26GHz
E5507
Two Intel Xeon 5500 Series Processors – Quad Core + Hyper-Threading, 5.86GT/s, 8MB cache
S6900-208
NTM/2.26QN
2.26GHz
E5520
S6900-210
NTM/2.40QN
2.40GHz
E5530
S6900-211
NTM/2.53QN
2.53GHz
E5540 (embedded)
Two Intel Xeon 5500 Series LV Processors – Quad Core, 4.8GT/s, 4MB cache
S6900-307
NTM/2.13QLM
2.13GHz
L5506
Two Intel Xeon 5500 Series LV Processors – Quad Core + Hyper-Threading, 5.86GT/s, 8MB cache
S6900-407
NTM/2.13QLN
2.13GHz
L5518 (embedded)
S6900-408
NTM/2.26QLN
2.26GHz
L5520

Specifications ATXN-5520 Technical Reference
Chassis Plans 1-2
S6900-410
NTM/2.40QLN
2.40GHz
L5530
Dual-Processor ATXW-5520Models
Model #
Model Name
Speed
Intel® CPU Brand Number
Two Intel Xeon 5600 Series Processors – Six Core, 5.86GT/s, 12MB cache
S7026-610
WTM/2.4MN
2.4GHz
E5645 (embedded)
Two Intel Xeon 5600 Series LV Processors – Six Core, 5.86GT/s, 12MB cache
S7026-631
WTM/2.0MLN
2.0GHz
L5638 (embedded)
S7026-633
WTM/2.26MLN
2.26GHz
L5640
Two Intel Xeon 5600 Series Processors – Quad Core, 5.86GT/s, 12MB cache
S7026-710
WTM/2.4QN
2.4GHz
E5620 (embedded)
S7026-711
WTM/2.53QN
2.53GHz
E5630
S7026-712
WTM/2.66QN
2.66GHz
E5640
Two Intel Xeon 5600 Series Processors – Quad Core, LV, 5.86GT/s, 12MB cache
S7026-730
WTM/1.87QLN
1.87GHz
L5618 (embedded)
S7026-732
WTM/2.13QLN
2.13GHz
L5630
NOTE: The term “embedded” in the Intel® CPU Brand Number column indicates a processor speed targeted by Intel® for long-life
availability and support. The length of support ranges from five years to over seven years. Contact Chassis Plans for additional details.

ATXN-5520 / ATXW-5520 Technical Reference Specifications
1-3 Chassis Plans
Single-Processor ATXN-5520 Models
Model #
Model Name
Speed
Intel® CPU Brand Number
One Intel Xeon 5500 Series Processor – Dual Core, 4.8GT/s, 4MB cache
S6900-045
NTMS/1.86DM
1.86GHz
E5502
S6900-047
NTMS/2.20DM
2.20GHz
E5503
One Intel Xeon 5500 Series LV Processor – Dual Core + Hyper-Threading, 5.86GT/s, 8MB cache
S6900-070
NTMS/2.0DLN
2.0GHz
L5508 (embedded)
One Intel Xeon 5500 Series Processor – Quad Core, 4.8GT/s, 4MB cache
S6900-146
NTMS/2.0QM
2.0GHz
E5504 (embedded)
S6900-147
NTMS/2.13QM
2.13GHz
E5506
S6900-148
NTMS/2.26QM
2.26GHz
E5507
One Intel Xeon 5500 Series Processor – Quad Core + Hyper-Threading, 5.86GT/s, 8MB cache
S6900-248
NTMS/2.26QN
2.26GHz
E5520
S6900-250
NTMS/2.40QN
2.40GHz
E5530
S6900-251
NTMS/2.53QN
2.53GHz
E5540 (embedded)
One Intel Xeon 5500 Series LV Processor – Quad Core, 4.8GT/s, 4MB cache
S6900-347
NTMS/2.13QLM
2.13GHz
L5506
One Intel Xeon 5500 Series LV Processor – Quad Core + Hyper-Threading, 5.86GT/s, 8MB cache
S6900-447
NTMS/2.13QLN
2.13GHz
L5518 (embedded)
S6900-448
NTMS/2.26QLN
2.26GHz
L5520
S6900-450
NTMS/2.40QLN
2.40GHz
L5530
Single-Processor ATXW-5520Models
Model #
Model Name
Speed
Intel® CPU Brand Number
One Intel Xeon 5600 Series Processor – Six Core, 5.86GT/s, 12MB cache
S7026-650
WTMS/2.4MN
2.4GHz
E5645 (embedded)
One Intel Xeon 5600 Series LV Processor – Six Core, 5.86GT/s, 12MB cache
S7026-671
WTMS/2.0MLN
2.0GHz
L5638 (embedded)
S7026-673
WTMS/2.26MLN
2.26GHz
L5640
One Intel Xeon 5600 Series Processor – Quad Core, 5.86GT/s, 12MB cache
S7026-750
WTMS/2.4QN
2.4GHz
E5620 (embedded)
S7026-751
WTMS/2.53QN
2.53GHz
E5630
S7026-752
WTMS/2.66QN
2.66GHz
E5640
One Intel Xeon 5600 Series Processor – Quad Core, LV, 5.86GT/s, 12MB cache
S7026-770
WTMS/1.87QLN
1.87GHz
L5618 (embedded)
S7026-772
WTMS/2.13QLN
2.13GHz
L5630
NOTE: The term “embedded” in the Intel® CPU Brand Number column indicates a processor speed targeted by Intel® for long-life
availability and support. The length of support ranges from five years to over seven years. Contact Chassis Plans for additional details.

Specifications ATXN-5520 / ATXW-5520 Technical Reference
Chassis Plans 1-4
Features
 Extended ATX motherboard form factor complies with the SSI-EEB Enterprise Electronics Bay
Specification 2008, Revision 1.1
 ATXN-5520 - Two, Intel® Xeon® Series 5500 (Nehalem-EP), Quad Core Processors
 Intel® Virtualization and Intel® VT-D on all CPUs
 Intel® Hyper-Threading available on selected CPUs
 ATXW-5520- Two, Intel® Xeon® Series 5600 (Westmere-EP), Six Core Processors
 Intel® Trusted Execution Technology (Intel® TXT) on all CPUs
 Intel® Virtualization and Intel® VT-D on all CPUs
 Intel® Hyper-Threading available most CPUs
 Intel® 5520 chipset (Tylersburg) with 4.8GT/s, 5.86GT/s or 6.4GT/s Intel® Quick Path Interconnect
(Intel® QPI) support
 I/O Controller Hub - Intel® ICH10R with built-in SATA/300 RAID support
 Six, dual-channel, DDR3-1333 memory interfaces
 Twelve, DIMM slots with a maximum capacity of 144GB of Double Data Rate (DDR3) system
memory
 Seven option card slots
 Five PCI Express® 2.0 or 1.1 slots
 One PCI Express 1.1 slot
 One 32-bit/33MHz PCI slot
 Four, 10/100/1000Base-T Ethernet interfaces
 Six, SATA/300 ports support independent SATA storage devices or may be configured to support
RAID 0, 1, 5 or 10 implementations
 Trusted Computing support via an on-board TPM 1.2
 Ten, Universal Serial Bus (USB 2.0) interfaces
 Eight USB ports are located on the motherboard‟s I/O plate
 Two, USB ports are available via an on-board header
 Two, RS-232 serial communication ports available via on-board headers
 Video port driven with Graphics Processing Unit (GPU) with 8MB of video memory to support
WUXGA resolutions (i.e. 1920 x 1200 pixels) at a 64k color depth
 Standard audio ports located on the motherboard‟s I/O plate
 PS/2 keyboard and mouse ports located on the motherboard‟s I/O plate
 Four, fan power headers simplify the integration of the system cooling solution
 Full PC compatibility

ATXN-5520 / ATXW-5520 Technical Reference Specifications
1-5 Chassis Plans
ATXN-5520 (S6900-xxx) – Extended ATX Motherboard Block Diagram

Specifications ATXN-5520 / ATXW-5520 Technical Reference
Chassis Plans 1-6
ATXW-5520(S7026-xxx) – Extended ATX Motherboard Block Diagram

ATXN-5520 / ATXW-5520 Technical Reference Specifications
1-7 Chassis Plans
ATXN-5520 (S6900-xxx) – Extended ATX Motherboard Layout
ATXW-5520(S7026-xxx) – Extended ATX Motherboard Layout

Specifications ATXN-5520 / ATXW-5520 Technical Reference
Chassis Plans 1-8
ATXN-5520 (S6900-xxx) / ATXW-5520(S7026-xxx) – Extended ATX Motherboard Dimension Drawing
ATXN-5520 (S6900-xxx) / ATXW-5520(S7026-xxx) – Rear I/O Plate Dimension Drawing
Notes:
• All dimensions are inches
• Typical PCIe pin 1 location is 0.049” from
connector center
• Typical PCI pin 1 location is 0.150” from
connector center
• Mounting holes have a nominal 0.156”
diameter
• Italic text indicates the center dimension of a
card slot or I/O connector
• Superscript 1 indicates card slot center
spacing
• Superscript 2 indicated I/O connector center
spacing
• The system power supply must provide +12V
power to both 12V AUX power connectors
(P15 and P16) for proper motherboard
operation

ATXN-5520 / ATXW-5520 Technical Reference Specifications
1-9 Chassis Plans
Processor
 Intel® Xeon® Processor, 5500 Series, Quad or Dual-Core (ATXN-5520)
 Intel® Xeon® Processor, 5600 Series, Six or Quad-Core (ATXW-5520)
 Processor plugs into an LGA1336 socket
Bus Interface
PCI Express® 2.0 compatible and supports a PCI Local Bus
Data Path
DDR3-1333 Memory - 72-bit
PCI Express 2.0 & 1.1, x4 and x8 electrical links
PCI Bus - 32-bit
Serial Interconnect & Bus Speeds
PCI Express 2.0 – 5.0GHz per lane
PCI Express 1.1 – 2.5GHz per lane
PCI – 33MHz
Quick Path Interconnect Speeds
The Intel® 5520 chipset supports 4.8GT/s, 5.86GT/s or 6.4GT/s data transfer speeds between processors and
between the processors and the motherboard‟s IOH. The speed of the Intel® QPI depends on the type of CPU
installed. The Quick Path Interconnect enables both processor-to-processor resource sharing and fast data
transfers between CPUs and the Intel® 5520 IOH.
Memory Interfaces
Three, dual-channel, Double Data Rate (DDR3) memory channels support PC3-10600, PC3-8500 or PC3-
6400 DIMMS connected directly to the processors. These memory interfaces may operated at speeds up to
1333MHz depending on the type of DDR3 DIMMs installed.
DMA Channels
The motherboard is fully PC compatible with seven DMA channels, each supporting type F transfers.
Interrupts
The motherboard is fully PC compatible with interrupt steering for PCI plug and play compatibility.
BIOS (Flash)
The BIOS is an AMIBIOS8® with built-in advanced CMOS setup for system parameters, peripheral
management for configuring on-board peripherals and other system parameters. The BIOS resides in the
Atmel® AT25128 SPI Serial EEPROM (SPI Flash). The BIOS may be upgraded from a USB thumb drive
storage device by pressing <Ctrl> + <Home> immediately after reset or power-up with the USB device
installed in drive A:. Custom BIOSs are available.
Cache Memory
The processors include either a 4MB, 8MB or 12MB last-level cache (LLC) memory capacity that is equally
shared between all of the processor cores on the die. Each individual processor core also has 256k mid-level
cache (MLC), a 32k L1 instruction cache and a 32k L1 data cache.

Specifications ATXN-5520 / ATXW-5520 Technical Reference
Chassis Plans 1-10
DDR3 Memory
Each processor on the motherboard supports three, dual-channel, DDR3-1333 memory interfaces. There are
twelve DIMM sockets on the board and each one can support up to 12GB DIMMs for a total possible DDR3
system memory capacity of 144GB. DDR3 memory capacities of 2GB, 4GB and 8GB are more common in
today‟s market; thereby, making the maximum practical limit of system memory supported 96GB. The
memory channel transfer rates is 1333MHz when using PC3-10600 (i.e. DDR3-1333) DIMMs. Each of the
channels (BK##A and BK##B) terminates with two dual in-line memory module (DIMM) sockets. The
System BIOS automatically detects memory type, size and speed.
The motherboard uses industry standard gold finger memory modules, which must be PC3-10600, PC3-8500
or PC3-6400 compliant and have the following features:
 Gold-plated contacts
 ECC registered (72-bit) DDR3 memory
 240-pin
The following DIMM sizes are supported:
MT/s
DIMM Type
Rank
Component Density
1333
PC3-10600
Single, Dual, Quad
1GB, 2GB, 4GB, 8GB, 12GB
1066
PC3-8500
Single, Dual, Quad
1GB, 2GB, 4GB, 8GB, 12GB
800
PC3-6400
Single, Dual, Quad
256MB, 512MB, 1GB, 2GB
NOTE 1: To maximize memory interface speed, populate each memory channel with DDR3 DIMMs having
the same interface speed. The motherboard will support DIMMs with different speeds, but the memory
channel interface will operate speed of the slowest DIMM.
NOTE 2: Low voltage (DDR3L) DIMMs are not supported.
NOTE 3: PC3-10600 DIMMs (DDR3-1333) are supported when one DIMM per channel is populated. If two
PC3-10600 DIMMs are installed in the same channel then the BIOS will log an error and operate the memory
channel at 1066 MT/s.
NOTE 4: Populating the memory channels with DIMMs having different speeds is supported on the
motherboard; however, the overall memory interface speed will run at the speed of the slowest DIMM.
NOTE 5: If populating a memory channel with a Quad-rank and a Single- or Dual-rank DIMM place the
Quad-rank DIMM farthest from the processor.
NOTE 6: Populate the memory channels starting with the DIMM socket farthest from the CPU and work you
way toward the processor as illustrated in the chart below:
Population order
CPU1
CPU2
1
BK02A
BK12A
2
BK01A
BK11A
3
BK00A
BK10A
4
BK02B
BK12B
5
BK01B
BK11B
6
BK00B
BK10B
If populating a memory channel with a Quad-rank and a Single- or Dual-rank DIMM place the Quad-rank
DIMM farthest from the processor.
PCI Express Option Card Slots
There are six PCI Express® option card slots supported on the motherboard. Five of these slots (PCIe7,
PCIe6, PCIe5, PCIe4 and PCIe2) support either PCI Express 2.0 or 1.1 option cards. PCIe3 is a PCI Express