Technical Reference
45
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INTEGRATOR’S NOTE
The back panel audio line out connector is designed to power headphones or amplified speakers
only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.
2.8.2 Internal I/O Connectors
The internal I/O connectors are divided into the following functional groups:
• Audio, power, and hardware control (see page 46)
Front panel audio
ATAPI CD-ROM
Fans (3)
ATX12V power
Main power
Chassis intrusion
• Add-in boards and peripheral interfaces (see page 49)
PCI bus
IDE
Diskette drive
2.8.2.1 Expansion Slots
The Desktop Board has three PCI rev 2.2 compliant local bus slots. The SMBus is routed to PCI
bus connector 2.
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INTEGRATOR’S NOTE
This document references back-panel slot numbering with respect to processor location on the
Desktop Board. PCI slots are identified as PCI slot #x, starting with the slot closest to the
processor. 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, but refers to an actual slot location on a chassis. Figure 6 on page 49 illustrates the
Desktop Board’s PCI slot numbering.
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