Intel Desktop Board DP55KG Product Guide
16
Intel
®
P55 Express Chipset
The Intel P55 Express Chipset consists of the Intel P55 Platform Controller Hub (PCH).
The PCH is the centralized controller for the board’s I/O paths.
Audio Subsystem
The onboard audio subsystem consists of the following components:
• Intel
®
P55 PCH
• Realtek ALC889 codec
The subsystem has the following headers and connectors:
• Back panel audio connectors, including S/PDIF in and out optical ports
• High Definition Audio front panel header that provides mic in and line out signals
for front panel audio connectors
• An onboard S/PDIF header
The audio subsystem supports the following features:
• Dolby* Home Theater certification
• A signal-to-noise (S/N) ratio of 95 dB
• Independent multi-streaming 8-channel (7.1) audio (using the back panel audio
connectors) and 2-channel audio (using the High Definition Audio front panel
header)
LAN Subsystem
The LAN subsystem includes:
• Intel PCH
• Intel 82578DM Gigabit (10/100/1000 Mb/s) Ethernet LAN controller
• RJ-45 LAN connector with integrated status LEDs
The subsystem features:
• CSMA/CD protocol engine
• LAN connect interface between PCH and the LAN controller
• PCI bus power management
Two LEDs are built into the RJ-45 LAN connector located on the back panel (see
Figure 2). These LEDs indicate the status of the LAN as shown in Table 3.
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