Intel D845EPT2 D845EPT2_D845EBG2_TechProdSpec. - Page 57

Internal I/O Connectors

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Technical Reference 2.8.2 Internal I/O Connectors The internal I/O connectors are divided into the following functional groups: • Audio (see page 58)  Auxiliary line in  ATAPI CD-ROM • Power and hardware control (see page 60)  Fans (three)  ATX12V  Main power • Add-in boards and peripheral interfaces (see page 63)  CNR (optional)  PCI bus (six on the Desktop Board D845EBG2; three on the Desktop Boards D845EPT2)  AGP  IDE (two)  Diskette drive  SCSI LED 2.8.2.1 Expansion Slots The Desktop Board has the following expansion slots: • One AGP connector. The AGP connector is keyed for 1.5 V AGP cards only. Do not install a legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards. • PCI rev 2.2 compliant local bus slots (six on the Desktop Board D845EBG2, three on the Desktop Board D845EPT2). The SMBus is routed to PCI bus connector 1 only (ATX expansion slot 6). PCI add-in cards with SMBus support can access sensor data and other information residing on the Desktop Board. • One CNR (optional), shared with PCI bus connector 3 (ATX expansion slot 1) on the Desktop Board D845EPT2 or with PCI bus connector 6 (ATX expansion slot 1) on the Desktop Board D845EBG2. ✏ NOTE This document references back-panel slot numbering with respect to processor location on the Desktop Board. The AGP slot is not numbered. PCI slots are identified as PCI slot #x, starting with the slot closest to the processor. The CNR slot shares an ATX expansion; slot 6 on the Desktop Board D845EBG2 and slot 3 on the Desktop Board D845EPT2. The ATX/MicroATX specifications identify expansion slot locations with respect to the far edge of a full-sized ATX chassis. The ATX specification and the Desktop Board's silkscreen are opposite and could cause confusion. The ATX numbering convention is made without respect to slot type (PCI vs. AGP), but refers to an actual slot location on a chassis. Figure 13 on page 63 illustrates the Desktop Board's PCI slot numbering. 57

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Technical Reference
57
2.8.2
Internal I/O Connectors
The internal I/O connectors are divided into the following functional groups:
•
Audio (see page 58)
Auxiliary line in
ATAPI CD-ROM
•
Power and hardware control (see page 60)
Fans (three)
ATX12V
Main power
•
Add-in boards and peripheral interfaces (see page 63)
CNR (optional)
PCI bus (six on the Desktop Board D845EBG2; three on the Desktop Boards D845EPT2)
AGP
IDE (two)
Diskette drive
SCSI LED
2.8.2.1
Expansion Slots
The Desktop Board has the following expansion slots:
•
One AGP connector.
The AGP connector is keyed for 1.5 V AGP cards only.
Do not install a
legacy 3.3 V AGP card.
The AGP connector is not mechanically compatible with legacy
3.3 V AGP cards.
•
PCI rev 2.2 compliant local bus slots (six on the Desktop Board D845EBG2, three on the
Desktop Board D845EPT2).
The SMBus is routed to PCI bus connector 1 only (ATX
expansion slot 6)
.
PCI add-in cards with SMBus support can access sensor data and other
information residing on the Desktop Board.
•
One CNR (optional), shared with PCI bus connector 3 (ATX expansion slot 1) on the Desktop
Board D845EPT2 or with PCI bus connector 6 (ATX expansion slot 1) on the Desktop Board
D845EBG2
.
✏
NOTE
This document references back-panel slot numbering with respect to processor location on the
Desktop Board.
The AGP slot is not numbered.
PCI slots are identified as PCI slot #x, starting
with the slot closest to the processor.
The CNR slot shares an ATX expansion; slot 6 on the
Desktop Board D845EBG2 and slot 3 on the Desktop Board D845EPT2.
The ATX/MicroATX
specifications identify expansion slot locations with respect to the far edge of a full-sized ATX
chassis.
The ATX specification and the Desktop Board
’
s silkscreen are opposite and could cause
confusion.
The ATX numbering convention is made without respect to slot type (PCI vs. AGP), but
refers to an actual slot location on a chassis.
Figure 13 on page 63 illustrates the
Desktop Board
’
s PCI slot numbering.