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Intel Desktop Board DH77EB Technical Product Specification

1.11.2.10 +5 V Standby Power Indicator LED

The +5 V standby power indicator LED shows that power is still present even when the

computer appears to be off. Figure 7 shows the location of the standby power LED.

CAUTION

If AC power has been switched off and the standby power indicator is still lit,

disconnect the power cord before installing or removing any devices connected to the

board. Failure to do so could damage the board and any attached devices.

Figure 7. Location of the Standby Power LED

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Intel® Desktop Board 1
DH77EB 1
Revision History 2
Preface 5
Other Common Notation 6
Contents 7
Figures 9
1 Product Description 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 Graphics Subsystem 17
1.4 System Memory 19
1.4.1 Memory Configurations 20
Product Description 21
1.5 Intel 22
H77 Express Chipset 22
(Note 1) 23
(Note 2) 23
1.5.2.5 DisplayPort* 24
Interfaces 24
1.5.3 USB 25
1.5.4 SATA Interfaces 25
1.5.4.1 SATA RAID 26
1.5.4.2 Intel 26
Smart Response Technology 26
1.7 Legacy I/O Controller 27
1.8 Audio Subsystem 28
Description 29
1.9 LAN Subsystem 30
1.10.1 Hardware Monitoring 32
1.10.2 Fan Monitoring 32
1.10.4 Thermal Monitoring 33
1.11 Power Management 34
1.11.2 Hardware Support 36
1.11.2.1 Power Connector 37
1.11.2.2 Fan Headers 37
CAUTION 38
2 Technical Reference 41
2.2 Connectors and Headers 43
2.2.1 Back Panel Connectors 44
Technical Reference 45
Table 19. SATA Connectors 48
Table 20. S/PDIF Header 48
(4-Pin) Fan Headers 49
2.2.2.4 Front Panel Header 54
2.3 Jumper Block 57
2.4.1 Form Factor 59
2.5.2 Power Supervisor 60
2.6 Thermal Considerations 61
2.7 Reliability 64
2.8 Environmental 64
3 Overview of BIOS Features 65
3.3 Resource Configuration 66
3.5 Legacy USB Support 67
3.6 BIOS Updates 68
3.7 BIOS Recovery 69
3.8 Boot Options 70
3.9 Adjusting Boot Speed 71
3.10 BIOS Security Features 72
Overview of BIOS Features 73
4.1 Speaker 75
4.2 BIOS Beep Codes 75
4.4 BIOS Error Messages 76
Subsystem 77
POST Code Description 82
Disposal Information 83
Statement 84
5.1.4 China RoHS 88
5.1.5 EMC Regulations 89
Description Mark 92

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