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Caution
Only the back panel USB, the front panel USB, VGA, and PS/2 connectors have overcurrent protection. The D845GBV boards' internal connectors are not overcurrent protected and should connect only to devices inside the computer's chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer's chassis. A fault in the load presented by the external devices could cause damage to the computer, the interconnecting cable, and the external devices themselves. Back Panel I/O Connectors The figure below shows the location of the back panel connectors. The back panel connectors are color-coded in compliance with PC 99 recommendations. The figure legend below lists the colors used. 
Item | Description | Color | A | PS/2 mouse port | Green | B | PS/2 keyboard port | Purple | C | USB port (optional) | Black | D | USB port (optional) | Black | E | Serial port A | Teal | F | Parallel port | Burgundy | G | VGA | Dark blue | H | USB port | Black | I | LAN (optional) | Black | J | USB port | Black | K | Mic in | Pink | L | Audio line out | Lime green | M | Audio line in | Light blue |
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Note: The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (nonamplified) speakers are connected to this output.
Internal I/O Connectors Audio, Power, and Hardware Control The figure below shows the location of the audio, power, and hardware control connectors. 
| Item | Description | | A | Front panel audio | | B | Auxiliary line in, ATAPI style (white) | | C | Rear chassis fan | | D | ATAPI CD-ROM (black) | | E | +12 V power connector (ATX12V) | | F | Processor fan | | G | Main power | | H | Chassis intrusion | | I | Front chassis fan |
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Item | Description | Color | A | Auxiliary line in, ATAPI style | White | B | ATAPI CD-ROM | Black |
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Add-in Board and Peripheral Interface Connectors The figure below shows the location of the add-in board connectors and peripheral connectors. Note the following considerations for the PCI bus connectors: - All of the PCI bus connectors are bus-master capable.
- PCI bus connector 2 has SMBus signals routed to it which enables PCI bus add-in boards with SMBus support to access sensor data on the board. The specific SMBus signals are as follows:
- The SMBus clock line is connected to pin A40
- The SMBus data line is connected to pin A41
| Item | Description | | A | CNR (optional) | | B | PCI bus connector 6 | | C | PCI bus connector 5 | | D | PCI bus connector 4 | | E | PCI bus connector 3 | | F | PCI bus connector 2 | | G | PCI bus connector 1 | | H | AGP connector | | I | Diskettte drive | | J | Primary IDE | | K | Secondary IDE | | L | SCSI LED |
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External I/O Connectors The figure below shows the location of the external I/O connectors.  | Item | Description | | A | Auxiliary front panel power/sleep/message-waiting LED | | B | Front panel | | C | Front panel USB |
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Front Panel Connector This section describes the functions of the front panel connector. The table below lists the signal names of the front panel connector.
Front Panel Connector | Pin | Signal | In/Out | Description | Pin | Signal | In/Out | Description | | 1 | HD_PWR | Out | Hard disk LED pull-up (330 ohm) to +5V | 2 | HDR_BLNK_GRN | Out | Front panel green LED | | 3 | HAD# | Out | Hard disk active LED | 4 | HDR_BLNK_YEL | Out | Front panel yellow LED | | 5 | Ground | | Ground | 6 | FPBUT_IN | In | Power switch | | 7 | FP_RESET# | In | Reset switch | 8 | Ground | | Ground | | 9 | +5 V | Out | Power | 10 | N/C | | Not connected |
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For more information about the front panel connector, see the Product Supplement Document for the Intel® Desktop Board D845GBV
This applies to:
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