Intel DH87RL User manual

Intel® Desktop Board
DH87RL
Technical Product Specification
May 2013
Part Number: G85647-001
The Intel Desktop Board DH87RL may contain design defects or errors known as errata that may cause the product to deviate from published specifications.
Current characterized errata are documented in the Intel Desktop Board DH87RL Specification Update.

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board DH87RL Technical Product
Specification May 2013
This product specification applies to only the standard Intel®Desktop Board with BIOS identifier
RLH8710H.86A.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL®PRODUCTS. NO LICENSE,
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DEATH MAY OCCUR.
All Intel®desktop boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal
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suitability of this product for other PC or embedded non-PC applications or other environments, such as
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conflicts or incompatibilities arising from future changes to them.
Intel desktop boards may contain design defects or errors known as errata, which may cause the product to
deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your
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* Other names and brands may be claimed as the property of others.
Copyright 2013, Intel Corporation. All rights reserved.

iii
Board Identification Information
Basic Desktop Board DH87RL Identification Information
AA Revision BIOS Revision Notes
G74240-400 RLH8710H.86A.0314 1,2
Notes:
1. The AA number is found on a small label on the component side of the board.
2. The H87 chipset used on this AA revision consists of the following component:
Device Stepping S-Spec Numbers
Intel H87 Express Chipset C1 SR139
Errata
Current characterized errata, if any, are documented in a separate Specification
Update. See http://www.intel.com/content/www/us/en/motherboards/desktop-
motherboards/motherboards.html?wapkw=desktop+boards for the latest
documentation.

Intel Desktop Board DH87RL Technical Product Specification
iv

v
Preface
This Technical Product Specification (TPS) specifies the board layout, components,
connectors, power and environmental requirements, and the BIOS for Intel®Desktop
Board DH87RL.
Intended Audience
The TPS is intended to provide detailed, technical information about Intel Desktop
Board DH87RL and its components to the vendors, system integrators, and other
engineers and technicians who need this level of information. It is specifically not
intended for general audiences.
What This Document Contains
Chapter Description
1 A description of the hardware used on Intel Desktop Board DH87RL
2
A map of the resources of the Intel Desktop Board
3
The features supported by the BIOS Setup program
4 A description of the BIOS error messages, beep codes, and Power-On-Self-Test
(POST) codes
5 Regulatory compliance and battery disposal information
Typographical Conventions
This section contains information about the conventions used in this specification. Not
all of these symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
NOTE
Notes call attention to important information.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.

Intel Desktop Board DH87RL Technical Product Specification
vi
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USBP0#)
GB Gigabyte (1,073,741,824 bytes)
GB/s Gigabytes per second
Gb/s Gigabits per second
KB Kilobyte (1024 bytes)
Kb Kilobit (1024 bits)
kb/s 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/s Megabytes per second
Mb Megabit (1,048,576 bits)
Mb/s Megabits per second
TDP Thermal Design Power
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
* This symbol is used to indicate third-party brands and names that are the property of their
respective owners.

vii
Contents
Revision History
Board Identification Information..................................................................iii
Errata ......................................................................................................iii
Preface
Intended Audience..................................................................................... v
What This Document Contains..................................................................... v
Typographical Conventions ......................................................................... v
1Product Description
1.1 Overview......................................................................................... 11
1.1.1 Feature Summary ................................................................. 11
1.1.2 Board Layout ........................................................................ 13
1.1.3 Block Diagram ...................................................................... 15
1.2 Online Support................................................................................. 16
1.3 Processor ........................................................................................ 16
1.3.1 Processor Graphics Subsystem................................................ 17
1.4 Intel®H87 Express Chipset................................................................ 20
1.4.1 Direct Media Interface (DMI) .................................................. 20
1.5 System Memory ............................................................................... 21
1.5.1 Memory Configurations .......................................................... 22
1.5.2 USB..................................................................................... 24
1.5.3 SATA Interfaces .................................................................... 24
1.6 Real-Time Clock Subsystem............................................................... 26
1.7 Super I/O Controller ......................................................................... 26
1.8 Audio Subsystem.............................................................................. 27
1.8.1 Audio Subsystem Software..................................................... 27
1.8.2 Audio Subsystem Components................................................ 28
1.9 LAN Subsystem................................................................................ 29
1.9.1 Intel®I217V Gigabit Ethernet Controller................................... 29
1.9.2 LAN Subsystem Software ....................................................... 30
1.9.3 RJ-45 LAN Connector with Integrated LEDs .............................. 30
1.10 Hardware Management Subsystem..................................................... 31
1.10.1 Hardware Monitoring ............................................................. 31
1.10.2 Fan Monitoring...................................................................... 31
1.10.3 Chassis Intrusion and Detection .............................................. 31
1.10.4 Thermal Monitoring ............................................................... 32
1.11 Power Management .......................................................................... 33
1.11.1 Software Support (ACPI)........................................................ 33
1.11.2 Hardware Support ................................................................. 35

Intel Desktop Board DH87RL Technical Product Specification
viii
2Technical Reference
2.1 Memory Resources ........................................................................... 39
2.1.1 Addressable Memory.............................................................. 39
2.2 Connectors and Headers.................................................................... 40
2.2.1 Back Panel Connectors........................................................... 41
2.2.2 Component-side Connectors and Headers................................. 42
2.3 BIOS Security Jumper....................................................................... 53
2.4 Mechanical Considerations................................................................. 55
2.4.1 Form Factor.......................................................................... 55
2.5 Electrical Considerations.................................................................... 56
2.5.1 Power Supply Considerations .................................................. 56
2.5.2 Fan Header Current Capability ................................................ 57
2.5.3 Add-in Board Considerations................................................... 57
2.6 Thermal Considerations..................................................................... 57
2.7 Reliability ........................................................................................ 60
2.8 Environmental.................................................................................. 60
3Overview of BIOS Features
3.1 Introduction..................................................................................... 61
3.2 BIOS Flash Memory Organization........................................................ 62
3.3 Resource Configuration ..................................................................... 63
3.3.1 PCI Express Autoconfiguration ................................................ 63
3.4 System Management BIOS (SMBIOS) ................................................. 63
3.5 Legacy USB Support ......................................................................... 63
3.6 BIOS Updates .................................................................................. 64
3.6.1 Language Support................................................................. 64
3.6.2 Custom Splash Screen ........................................................... 65
3.7 BIOS Recovery................................................................................. 65
3.8 Boot Options.................................................................................... 66
3.8.1 Optical Drive Boot ................................................................. 66
3.8.2 Network Boot........................................................................ 66
3.8.3 Booting Without Attached Devices ........................................... 66
3.8.4 Changing the Default Boot Device During POST......................... 66
3.9 Adjusting Boot Speed........................................................................ 67
3.9.1 Peripheral Selection and Configuration..................................... 67
3.9.2 BIOS Boot Optimizations........................................................ 67
3.9.3 Power Button Menu ............................................................... 68
3.10 Hard Disk Drive Password Security Feature.......................................... 68
3.11 BIOS Security Features ..................................................................... 69
3.12 BIOS Performance Features ............................................................... 71
4BIOS Error Codes and Messages
4.1 BIOS Error Codes ............................................................................. 73
4.1.1 BIOS Beep Codes.................................................................. 73
4.1.2 Front-panel Power LED Blink Codes ......................................... 74
4.2 BIOS Error Messages ........................................................................ 74

Contents
ix
5Regulatory Compliance and Battery Disposal Information
5.1 Regulatory Compliance...................................................................... 75
5.1.1 Safety Standards................................................................... 75
5.1.2 European Union Declaration of Conformity Statement................ 76
5.1.3 Product Ecology Statements ................................................... 77
5.1.4 China RoHS .......................................................................... 78
5.1.5 EMC Regulations ................................................................... 79
5.1.6 ENERGY STAR* 5.2, e-Standby, and ErP Compliance ................. 81
5.1.7 Regulatory Compliance Marks (Board Level) ............................. 82
5.2 Battery Disposal Information.............................................................. 83
Figures
1. Major Board Components .................................................................. 13
2. Block Diagram.................................................................................. 15
3. Memory Channel and DIMM Configuration............................................ 23
4. Back Panel Audio Connectors ............................................................. 28
5. LAN Connector LED Locations............................................................. 30
6. Thermal Sensors and Fan Headers...................................................... 32
7. Location of the Enhanced Standby Power LED ...................................... 38
8. Back Panel Connectors...................................................................... 41
9. Component-side Connectors and Headers............................................ 42
10. Connection Diagram for Front Panel Header......................................... 49
11. Connection Diagram for the Front Panel Dual-Port USB 2.0 Connectors ... 51
12. Connection Diagram for the Front Panel USB 2.0 Single-Port Header....... 51
13. Connection Diagram for the Front Panel USB 3.0 Connector................... 52
14. Location of the Jumper...................................................................... 53
15. Board Dimensions............................................................................. 55
16. Localized High Temperature Zones ..................................................... 58
17. Intel Visual BIOS Screen ................................................................... 61
18. Intel Desktop Board DH87RL China RoHS Material Self
Declaration Table.............................................................................. 78
Tables
1. Feature Summary............................................................................. 11
2. Components Shown in Figure 1 .......................................................... 14
3. DVI Port Status Conditions................................................................. 17
4. HDMI Port Status Conditions.............................................................. 18
5. DisplayPort Status Conditions............................................................. 18
6. Audio Formats Supported by the HDMI and DisplayPort Interfaces.......... 19
7. Supported Memory Configurations...................................................... 21
8. Audio Jack Support........................................................................... 27
9. LAN Connector LED States................................................................. 30
10. Effects of Pressing the Power Switch ................................................... 33
11. Power States and Targeted System Power........................................... 34

Intel Desktop Board DH87RL Technical Product Specification
x
12. Wake-up Devices and Events ............................................................. 34
13. Component-side Connectors and Headers Shown in Figure 9.................. 43
14. Front Panel Audio Connector for Intel HD Audio.................................... 44
15. Front Panel Audio Connector for AC ’97 Audio ...................................... 44
16. Dual-Port Front Panel USB 2.0 Header................................................. 44
17. Front Panel Single-Port USB 2.0 Header .............................................. 44
18. Front Panel USB 3.0 Connector........................................................... 45
19. SATA Connectors.............................................................................. 45
20. S/PDIF Header ................................................................................. 45
21. Processor, Front, and Rear Chassis (4-Pin) Fan Headers....................... 46
22. Front Panel CIR Receiver (Input) Header............................................. 46
23. Chassis Intrusion Header................................................................... 46
24. TPM Header ..................................................................................... 46
25. PCI Express Full-/Half-Mini Card Connector.......................................... 47
26. Processor Core Power Connector ........................................................ 48
27. Main Power Connector....................................................................... 48
28. Front Panel Connector....................................................................... 49
29. States for a One-Color Power LED....................................................... 50
30. States for a Two-Color Power LED....................................................... 50
31. Alternate Front Panel Power/Sleep LED Header..................................... 50
32. BIOS Setup Security Jumper Settings ................................................. 54
33. Fan Header Current Capability............................................................ 57
34. Thermal Considerations for Components.............................................. 59
35. Environmental Specifications.............................................................. 60
36. Intel Visual BIOS Setup Display Areas................................................. 62
37. BIOS Setup Program Function Keys .................................................... 62
38. Acceptable Drives/Media Types for BIOS Recovery................................ 65
39. Boot Device Menu Options................................................................. 66
40. Master Key and User Hard Drive Password Functions ............................ 68
41. Supervisor and User Password Functions ............................................. 70
42. BIOS Beep Codes ............................................................................. 73
43. Front-panel Power LED Blink Codes..................................................... 74
44. BIOS Error Messages ........................................................................ 74
45. Safety Standards.............................................................................. 75
46. EMC Regulations............................................................................... 79
47. Regulatory Compliance Marks ............................................................ 82

11
1Product Description
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the board.
Table 1. Feature Summary
Form Factor MicroATX (9.60 inches by 9.60 inches [243.84 millimeters by
243.84 millimeters])
Processor •4th generation Intel
®
Core™ processor with up to 95 W TDP in an LGA1150
socket
―One PCI Express* x16 graphics interface
―Integrated memory controller with dual channel DDR3 memory support
―Integrated graphics processing
―External graphics interface controller
Graphics •Integrated graphics support for processors with Intel HD Graphics:
―High Definition Multimedia Interface* (HDMI*) v1.4a
―DVI-I v1.0
―DisplayPort* v1.2
•Support for a PCI Express* 3.0 x16 add-in graphics card
Memory •
Four 240-pin DDR3 SDRAM Dual Inline Memory Module (DIMM) sockets
•Support for DDR3 1333 MHz to DDR3 1600 MHz DIMMs
•Support for 1 Gb, 2 Gb, and 4 Gb memory technology
•Support for up to 32 GB of system memory with four DIMMs using 4 Gb
memory technology
•Support for non-ECC memory
•Support for 1.5 V (standard voltage) and 1.35 V (low voltage) JEDEC memory
•Support for XMP memory
Chipset Intel
®
H87 Express Chipset consisting of the Intel
®
H87 Express Platform
Controller Hub (PCH)
continued

Intel Desktop Board DH87RL Technical Product Specification
12
Table 1. Feature Summary (continued)
Peripheral
Interfaces
•USB 3.0 ports:
―Four USB 3.0 ports are implemented with stacked back panel connectors
―Two front panel USB 3.0 ports are implemented through one internal
connector
•USB 2.0 ports:
―Two ports are implemented with stacked back panel connectors
―Four front panel ports are implemented through two dual-port internal
connectors
―One single-port internal header for front panel cabling
―One port is reserved for the PCI Express Full-/Half-Mini Card slot
•Five Serial ATA (SATA) 6.0 Gb/s ports
Audio 10-channel (8 + 2) Intel High Definition Audio via the Realtek* ALC892 audio
codec
LAN Support Gigabit (10/100/1000 Mb/s) LAN subsystem using the Intel®I217V Gigabit
Ethernet Controller
Expansion
Capabilities
•One PCI Express x16 3.0/2.x/1.x add-in card connector
•Three PCI Express x1 2.x/1.x add-in card connectors
•One PCI Express Full-/Half-Mini Card slot with support for mSATA
Intel® Visual BIOS •Intel®BIOS resident in SPI Flash device
•Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
Instantly Available
PC Technology
•Support for PCI Express* Revision 3.0
•Suspend to RAM support
•Wake on PCI Express, LAN, front panel, Consumer Infrared (CIR), and
USB ports
Super I/O Control Nuvoton NCT6883D-T I/O controller for CIR and hardware management support
Hardware Monitor
Subsystem
•Hardware monitoring through the Nuvoton I/O controller
•Voltage sense to detect out of range power supply voltages
•Thermal sense to detect out of range thermal values
•Three fan headers
•Three fan sense inputs used to monitor fan activity
•Fan speed control

Product Description
13
1.1.2 Board Layout
Figure 1 shows the location of the major components on Intel Desktop Board DH87RL.
Figure 1. Major Board Components

Intel Desktop Board DH87RL Technical Product Specification
14
Table 2 lists the components identified in Figure 1.
Table 2. Components Shown in Figure 1
Item/callout
from Figure 1 Description
A PCI Express x1 add-in card connector
B PCI Express x1 add-in card connector
C PCI Express x16 add-in card connector
D Battery
E PCI Express x1 add-in card connector
F Back panel connectors
G Processor core power connector (2 x 2)
H LGA1150 processor socket
I Processor fan header
J DIMM 3 (Channel A DIMM 0)
K DIMM 1 (Channel A DIMM 1)
L DIMM 4 (Channel B DIMM 0)
M DIMM 2 (Channel B DIMM 1)
N Front fan header
O Trusted Platform Module header
P Power supervisor LED
Q Consumer IR receiver (input) header
R Enhanced standby power LED
S Main power connector (2 x 12)
T BIOS security jumper
U Piezoelectric speaker
V Front panel USB 3.0 connector
W Intel H87 Express Chipset
X Chassis intrusion header
Y Front panel connector
Z Alternate front panel power/sleep LED header
AA SATA 6.0 Gb/s connectors
BB PCI Express Full-/Half-Mini Card slot
CC Front panel dual-port USB 2.0 connectors
DD Front panel single-port USB 2.0 header
EE Rear chassis fan header
FF S/PDIF out header
GG Front panel audio connector

Product Description
15
1.1.3 Block Diagram
Figure 2 is a block diagram of the major functional areas of the board.
Figure 2. Block Diagram

Intel Desktop Board DH87RL Technical Product Specification
16
1.2 Online Support
To find information about… Visit this World Wide Web site:
Intel Desktop Board DH87RL http://www.intel.com/products/motherboard/index.htm
Desktop Board Support http://www.intel.com/p/en_US/support?iid=hdr+support
Available configurations for Intel
Desktop Board DH87RL http://ark.intel.com
Supported processors http://processormatch.intel.com
Chipset information https://www-
ssl.intel.com/content/www/us/en/chipsets/performance-
chipsets/chipsets.html
BIOS and driver updates http://downloadcenter.intel.com
Tested memory http://www.intel.com/support/motherboards/desktop/sb/CS-
025414.htm
Integration information http://www.intel.com/support/go/buildit
1.3 Processor
The board supports 4th generation Intel Core processors. Other processors may be
supported in the future. This board supports processors with a maximum wattage of
95 W Thermal Design Power (TDP). The processors listed above are only supported
when falling within the wattage requirements of Intel Desktop Board DH87RL. See the
Intel web site listed below for the most up-to-date list of supported processors.
For information about… Refer to:
Supported processors http://processormatch.intel.com
CAUTION
Use only the processors listed on the web site above. Use of unsupported processors
can damage the board, the processor, and the power supply.
NOTE
This board has specific requirements for providing power to the processor. Refer to
Section 2.5.1 on page 56 for information on power supply requirements for this board.

Product Description
17
1.3.1 Processor Graphics Subsystem
The board supports graphics through either the processor Intel HD Graphics or a PCI
Express x16 add-in graphics card.
The board supports integrated graphics for processors with Intel HD Graphics.
1.3.1.1 Intel® High Definition (Intel® HD) Graphics
The Intel HD graphics controller features the following:
•3D Features
DirectX* 11.1 support
OpenGL* 4.0 support
•Video
Next Generation Intel®Clear Video Technology HD support is a collection of
video playback and enhancement features that improve the end user’s viewing
experience
Encode/transcode HD content
Playback of high definition content including Blu-ray* disc
Superior image quality with sharper, more colorful images
Playback of Blu-ray disc S3D content using HDMI (1.4a spec compliant
with 3D)
DirectX* Video Acceleration (DXVA) support for accelerating video processing
Full AVC/VC1/MPEG2 HW Decode
Intel®HD Graphics with Advanced Hardware Video Transcoding (Intel®Quick
Sync Video)
Note: Intel Quick Sync Video is enabled by an appropriate software application.
1.3.1.2 Digital Visual Interface (DVI-I)
The DVI-I port supports both digital and analog DVI displays. The maximum
supported resolution is 1900 x 1200 @ 60Hz. The DVI port is compliant with the
DVI 1.0 specification. DVI analog output can also be converted to VGA using a DVI-
VGA converter.
Depending on the type of add-in card installed in the PCI Express x16 connector, the
DVI port will behave as described in Table 3.
Table 3. DVI Port Status Conditions
PCI Express x16 Connector Status
DVI Digital (DVI-D)
Port Status
DVI Analog (DVI-A)
Port Status (Note 1)
No add-in card installed Enabled Enabled
PCI Express x16 add-in card installed Enabled
(Note 2)
Enabled
(Note 2)
Notes:
1. DVI analog output can also be converted to VGA with a DVI-VGA converter.
2. May require BIOS setup menu changes.

Intel Desktop Board DH87RL Technical Product Specification
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1.3.1.3 High Definition Multimedia Interface* (HDMI*)
The High-Definition Multimedia Interface (HDMI) is provided for transmitting
uncompressed digital audio and video signals to television sets, projectors and other
video displays. It can carry high quality multi-channel audio data and all standard and
high-definition consumer electronics video formats. The HDMI display interface
connecting the processor and display devices utilizes transition minimized differential
signaling (TMDS) to carry audiovisual information through the same HDMI cable. The
processor HDMI interface is designed according to the High-Definition Multimedia
Interface Specification with 3D, 4K, Deep Color, and x.v.Color.
The maximum supported resolution is 4096 x 2304 @ 24Hz or 2560 x 1600 @ 60Hz.
The HDMI interface supports the HDMI 1.4a specification.
Depending on the type of add-in card installed in the PCI Express x16 connector, the
HDMI port will behave as described in Table 4.
Table 4. HDMI Port Status Conditions
PCI Express x16 Connector Status HDMI Port Status
No add-in card installed
Enabled
PCI Express x16 add-in card installed
Enabled (Note)
Note: May require BIOS setup menu changes.
1.3.1.4 DisplayPort*
DisplayPort is a digital communication interface that utilizes differential signaling to
achieve a high bandwidth bus interface designed to support connections between PCs
and monitors, projectors, and TV displays. DisplayPort is suitable for display
connections between consumer electronics devices such as high definition optical disc
players, set top boxes, and TV displays. DisplayPort output can also be converted to
HDMI using a DisplayPort-HDMI converter. The DisplayPort interface supports the 1.2
specification, including Multi-Stream Transport (MST) for monitor daisy-chaining.
DisplayPort’s maximum supported display resolution is 3840 x 2160 @ 60 Hz.
Table 5. DisplayPort Status Conditions
PCI Express x16 Connector Status DisplayPort Status
No add-in card installed Enabled
PCI Express x16 add-in card installed Enabled
(Note)
Note: May require BIOS setup menu changes.
For information about Refer to
DisplayPort technology http://www.displayport.org
1.3.1.5 High-bandwidth Digital Content Protection (HDCP)
HDCP is the technology for protecting high definition content against unauthorized
copy or interception between a source (computer, digital set top boxes, etc.) and the
sink (panels, monitor, and TVs). The PCH supports HDCP 1.4 for content protection
over wired displays (HDMI, DVI, and DisplayPort).

Product Description
19
1.3.1.6 Integrated Audio Provided by the HDMI and DisplayPort
Interfaces
The HDMI and DisplayPort interfaces from the PCH support audio. The processor
supports two High Definition audio streams on two digital ports simultaneously.
Table 6 shows the specific audio technologies supported by the PCH.
Table 6. Audio Formats Supported by the HDMI and DisplayPort Interfaces
Audio Formats HDMI DisplayPort
AC-3 - Dolby* Digital Yes Yes
Dolby Digital Plus Yes Yes
DTS-HD* Yes Yes
LPCM, 192 kHz/24 bit, 8 Channel Yes Yes
Dolby TrueHD, DTS-HD Master
Audio* (Lossless Blu-ray Disc
Audio Format)
Yes Yes
1.3.1.7 Multiple Display Configurations
The following multiple display configuration modes are supported (with appropriate
driver software):
•Single Display is a mode with one display port activated to display the output to
one display device.
•Intel®Display Clone is a mode with up to three display ports activated to drive the
display content of same color depth setting but potentially different refresh rate
and resolution settings to all the active display devices connected.
•Extended Desktop is a mode with up to three display ports activated to drive the
content with potentially different color depth, refresh rate, and resolution settings
on each of the active display devices connected.
1.3.1.8 PCI Express Graphics
4th generation Intel Core processors support PCI Express 3.0, 2.x, and 1.x:
•PCI Express 3.0 with a raw bit rate of 8.0 GT/s results in an effective bandwidth of
1 GB/s each direction per lane. The maximum theoretical bandwidth of the x16
interface is 16 GB/s in each direction, simultaneously, for a total bandwidth of
32 GB/s.
•PCI Express 2.x with a raw bit rate of 5.0 GT/s results in an effective bandwidth of
500 MB/s each direction per lane. The maximum theoretical bandwidth of the x16
interface is 8 GB/s in each direction, simultaneously, for a total bandwidth of
16 GB/s.
•PCI Express 1.x with a raw bit rate of 2.5 GT/s results in an effective bandwidth of
250 MB/s each direction per lane. The maximum theoretical bandwidth of the x16
interface is 4 GB/s in each direction, simultaneously, for a total bandwidth of
8 GB/s.
For information about Refer to
PCI Express technology http://www.pcisig.com

Intel Desktop Board DH87RL Technical Product Specification
20
1.4 Intel® H87 Express Chipset
Intel H87 Express Chipset with Direct Media Interface (DMI) interconnect provides
interfaces to the processor and USB, SATA, LPC, LAN, and PCI Express. The Intel H87
Express Chipset is a centralized controller for the board’s I/O paths.
For information about Refer to
The Intel H87 chipset http://www.intel.com/products/desktop/chipsets/index.htm
Resources used by the chipset Chapter 2
1.4.1 Direct Media Interface (DMI)
Direct Media Interface (DMI) is the chip-to-chip connection between the processor and
the PCH. This high-speed interface integrates advanced priority-based servicing
allowing for concurrent traffic and true isochronous transfer capabilities.