Dell OptiPlex GXi Service Manual (.pdf) - Page 29

Built-In Audio Controller, Built-In NIC, NIC Daughter Board

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microprocessor is much faster. The PCI bus operates at a frequency of 33 MHz as opposed to the 8.25-MHz operating frequency of the ISA bus. The built-in video controller includes 2 MB of video memory built into the system board. Built-In Audio Controller The built-in audio controller is a single-chip sound solution. The audio controller connects to the ISA bus. The audio controller has analog jacks for line-in and microphone input. The single line-out output jack provides stereo output for a line-level input to an external amplifier or drives stereo headphones. See "Technical Specifications" found later in this chapter for audio jack input and output specifications. Built-In NIC The Dell OptiPlex GXi systems have an integrated 10/100-Mbps 3Com® PCI 3C905 Ethernet NIC subsystem. The system contains either a 100BASE-TX or 100BASE-T4 NIC daughter board, depending on network cabling requirements. Both NIC daughter boards support the 10BASE-T Ethernet standard. To distinguish the two boards, the designation T4 appears in the upper-right corner of the 100BASE-T4 board, as shown in Figure 1-10. For 10BASE-T and 100BASE-T4 networks, Category 3 or greater wiring and connectors can be used. For 100BASE-TX networks, Category 5 wiring and connections must be used. T4 designation back panel of the computer Figure 1-10. NIC Daughter Board The NIC subsystem connects to the Ethernet network through a single RJ45 connector on the back panel of the computer. The RJ45 connector and NIC interface circuitry is mounted on the daughter board, which plugs into the system board. System Overview 1-11

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System Overview
1-11
microprocessor is much faster. The PCI bus operates at a frequency of 33 MHz as
opposed to the 8.25-MHz operating frequency of the ISA bus.
The built-in video controller includes 2 MB of video memory built into the sys-
tem board.
Built-In Audio Controller
The built-in audio controller is a single-chip sound solution. The audio controller
connects to the ISA bus.
The audio controller has analog jacks for line-in and microphone input. The single
line-out output jack provides stereo output for a line-level input to an external
amplifier or drives stereo headphones. See “Technical Specifications” found later
in this chapter for audio jack input and output specifications.
Built-In NIC
The Dell OptiPlex GXi systems have an integrated 10/100-Mbps 3Com
®
PCI
3C905 Ethernet NIC subsystem. The system contains either a 100BASE-TX or
100BASE-T4 NIC daughter board, depending on network cabling require-
ments. Both NIC daughter boards support the 10BASE-T Ethernet standard. To
distinguish the two boards, the designation
T4
appears in the upper-right corner
of the 100BASE-T4 board, as shown in Figure 1-10. For 10BASE-T and
100BASE-T4 networks, Category 3 or greater wiring and connectors can be
used. For 100BASE-TX networks, Category 5 wiring and connections must be
used.
Figure 1-10.
NIC Daughter Board
The NIC subsystem connects to the Ethernet network through a single RJ45
connector on the back panel of the computer. The RJ45 connector and NIC
interface circuitry is mounted on the daughter board, which plugs into the sys-
tem board.
T4 designation
back panel of
the computer