Intel DX48BT2 用户手册

15 

®

The Intel X48 Express Chipset consists of the following devices: 
•  Intel X48 Express Chipset Memory Controller Hub (MCH) with Direct Media 

Interface (DMI) interconnect 

•  Intel 82801IR I/O Controller Hub (ICH9R) with DMI interconnect 
The MCH provides interfaces to the processor, memory, PCI Express bus, and the DMI 
interconnect.  ICH9R is a centralized controller for the board’s I/O paths. 

Go to the following link for more information about the Intel X48 Express Chipset: 

The onboard audio subsystem consists of the following components: 
•  Intel

®

 ICH9R I/O controller hub 

•  IDT STAC9274D audio codec 
The subsystem has the following headers and connectors: 
•  Back panel audio connectors, including an S/PDIF optical port 
•  High Definition (HD) Audio front panel header that provides mic in and line out 

signals for front panel audio connectors 

•  HD Audio Link header used for HDMI video cards 
•  S/PDIF connector that can be used for HDMI video cards that do not work with the 

HD Audio Link header 

The audio subsystem supports the following features: 
•  Dolby* Home Theater  
•  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 Intel High Definition Audio front panel 
header)  

•  ADAT optical interface support via the back panel S/PDIF optical port 

Go to the following link or pages for more information about: 
•  Audio drivers and utilities 

•  The location of the onboard audio headers, Figure 27 on page 48 
•  The signal names for the Intel High Definition Audio front panel header and the HD 

Audio Link header, page 49 

•  The back panel audio connectors, Figure 28 on page 53