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Intel D915GAG Product Specification - Page 45

Power Connector, 13.2.2, Fan Connectors - fan speed

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Product Description Resume on Ring enables telephony devices to access the computer when it is in a power-managed state. The method used depends on the type of telephony device (external or internal). NOTE The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support. 1.13.2.1 Power Connector ATX12V-compliant power supplies can turn off the system power through system control. When an ACPI-enabled system receives the correct command, the power supply removes all non-standby voltages. When resuming from an AC power failure, the computer returns to the power state it was in before power was interrupted (on or off). The computer's response can be set using the Last Power State feature in the BIOS Setup program's Boot menu. For information about The location of the main power connector on the D915GAV board The location of the main power connector on the D915GAG board The signal names of the main power connector Refer to Figure 19, page 66 Figure 20, page 68 Table 31, page 72 1.13.2.2 Fan Connectors The function/operation of the fan connectors is as follows: • The fans are on when the board is in the S0 or S1 state. • The fans are off when the board is off or in the S3, S4, or S5 state. • Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan control ASIC. • All fan connectors support closed-loop fan control that can adjust the fan speed or switch the fan on or off as needed. • All fan connectors have a +12 V DC connection. For information about The location of the fan connectors on the D915GAV board The location of the fan connectors on the D915GAG board The location of the fan connectors and sensors for thermal monitoring on the D915GAV board The location of the fan connectors and sensors for thermal monitoring on the D915GAG board The signal names of the processor fan connector The signal names of the chassis fan connectors Refer to Figure 19, page 66 Figure 20, page 68 Figure 14, page 39 Figure 15, page 40 Table 29, page 71 Table 30, page 71 45

Section	Page
Intel® Desktop Boards D915GAV/D915GAG Technical Product Specification	1
Revision History	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Other Common Notations	4
Contents	5
1 Product Description	11
1.1 PCI Bus Terminology Change	11
1.2 Board Differences	11
1.3 Overview	12
1.3.1 Feature Summary	12
1.3.2 Manufacturing Options	13
1.3.3 Board Layouts	14
1.3.4 Block Diagram	18
1.4 Online Support	19
1.5 Processor	19
1.6 System Memory	20
1.6.1 Memory Configurations	22
1.7 Intel® 915G Chipset	26
1.7.1 Intel 915G Graphics Subsystem	26
1.7.2 USB	28
1.7.3 IDE Support	28
1.7.4 Real-Time Clock, CMOS SRAM, and Battery	30
1.8 PCI Express Connectors	30
1.9 I/O Controller	31
1.9.1 Serial Ports	31
1.9.2 Parallel Port	31
1.9.3 Diskette Drive Controller	32
1.9.4 Keyboard and Mouse Interface	32
1.10 Audio Subsystem	32
1.10.1 Audio Subsystem Software	33
1.10.2 Audio Connectors	33
1.10.3 Intel High Definition Audio Subsystem	34
1.11 LAN Subsystem	35
1.11.1 10/100 Mbits/sec LAN Subsystem	35
1.11.2 Gigabit LAN Subsystem	36
1.11.3 Alert Standard Format (ASF) Support	37
1.11.4 LAN Subsystem Software	38
1.12 Hardware Management Subsystem	38
1.12.1 Hardware Monitoring and Fan Control ASIC	38
1.12.2 Thermal Monitoring	39
1.12.3 Fan Monitoring	41
1.12.4 Chassis Intrusion and Detection	41
1.13 Power Management	41
1.13.1 ACPI	41
1.13.2 Hardware Support	44
1.14 Trusted Platform Module (Optional)	48
1.14.1 System Requirements	48
1.14.2 Warning of Potential Data Loss	48
1.14.3 Security Precautions	49
1.14.4 Trusted Platform Module Ownership	50
1.14.5 Enabling the Trusted Platform Module	51
1.14.6 Assuming Trusted Platform Module Ownership	51
1.14.7 Recovery Procedures	52
1.14.8 Clearing Trusted Platform Module Ownership	53
1.14.9 Software Support	54
2 Technical Reference	55
2.1 Introduction	55
2.2 Memory Resources	55
2.2.1 Addressable Memory	55
2.2.2 Memory Map	57
2.3 DMA Channels	57
2.4 Fixed I/O Map	58
2.5 PCI Configuration Space Map	59
2.6 Interrupts	60
2.7 PCI Conventional Interrupt Routing Map	61
2.8 Connectors	63
2.8.1 Back Panel Connectors	64
2.8.2 Component-side Connectors	66
2.9 Jumper Block	77
2.10 Mechanical Considerations	78
2.10.1 D915GAV Board Form Factor	78
2.10.2 D915GAG Board Form Factor	79
2.10.3 I/O Shield	80
2.11 Electrical Considerations	81
2.11.1 DC Loading	81
2.11.2 Add-in Board Considerations	81
2.11.3 Fan Connector Current Capability	82
2.11.4 Power Supply Considerations	82
2.12 Thermal Considerations	83
2.13 Reliability	85
2.14 Environmental	86
2.15 Regulatory Compliance	87
2.15.1 Safety Regulations	87
2.15.2 EMC Regulations	87
2.15.3 European Union Declaration of Conformity Statement	88
2.15.4 Product Ecology Statements	89
2.15.5 Product Certification Markings (Board Level)	90
3 Overview of BIOS Features	91
3.1 Introduction	91
3.2 BIOS Flash Memory Organization	92
3.3 Resource Configuration	92
3.3.1 PCI Autoconfiguration	92
3.3.2 PCI IDE Support	92
3.4 System Management BIOS (SMBIOS)	93
3.5 Legacy USB Support	93
3.6 BIOS Updates	94
3.6.1 Language Support	94
3.6.2 Custom Splash Screen	94
3.7 Boot Options	95
3.7.1 CD-ROM Boot	95
3.7.2 Network Boot	95
3.7.3 Booting Without Attached Devices	95
3.7.4 Changing the Default Boot Device During POST	95
3.8 Fast Booting Systems with Intel Rapid BIOS Boot	96
3.8.1 Peripheral Selection and Configuration	96
3.8.2 Intel Rapid BIOS Boot	96
3.9 BIOS Security Features	97
4 Error Messages and Beep Codes	99
4.1 BIOS Error Messages	99
4.2 Port 80h POST Codes	101
4.3 Bus Initialization Checkpoints	105
4.4 Speaker	106

Match case Limit results 1 per page

Product Description

Resume on Ring enables telephony devices to access the computer when it is in a power-managed

state.

The method used depends on the type of telephony device (external or internal).

NOTE

The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an

operating system that provides full ACPI support.

1.13.2.1

Power Connector

ATX12V-compliant power supplies can turn off the system power through system control.

When

an ACPI-enabled system receives the correct command, the power supply removes all non-standby

voltages.

When resuming from an AC power failure, the computer returns to the power state it was in before

power was interrupted (on or off).

The computer’s response can be set using the Last Power State

feature in the BIOS Setup program’s Boot menu.

For information about

Refer to

The location of the main power connector on the D915GAV board

Figure 19, page 66

The location of the main power connector on the D915GAG board

Figure 20, page 68

The signal names of the main power connector

Table 31, page 72

1.13.2.2

Fan Connectors

The function/operation of the fan connectors is as follows:

•

The fans are on when the board is in the S0 or S1 state.

•

The fans are off when the board is off or in the S3, S4, or S5 state.

•

Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan

control ASIC.

•

All fan connectors support closed-loop fan control that can adjust the fan speed or switch the

fan on or off as needed.

•

All fan connectors have a +12 V DC connection.

For information about

Refer to

The location of the fan connectors on the D915GAV board

Figure 19, page 66

The location of the fan connectors on the D915GAG board

Figure 20, page 68

The location of the fan connectors and sensors for thermal monitoring on the

D915GAV board

Figure 14, page 39

The location of the fan connectors and sensors for thermal monitoring on the

D915GAG board

Figure 15, page 40

The signal names of the processor fan connector

Table 29, page 71

The signal names of the chassis fan connectors

Table 30, page 71