- PCI 2.2 interface with bus mastering and burst modes 
 - 4 synchronous I2S output pairs 
 - 4 synchronous I2S input pairs
 - Multi-channel AC-link can support 2 AC97 codecs
 - All I2S I/O pairs support 32-bit high-definition PCM data transfer and adjustable sample rate up to 192KHz

 - 32-bit PCI 2.1 compatible bus master. 
 - 8738-LX/MX supports 6CH DAC 5.1 surround output for movies and 3D games. 
 - 8738-SX supports 4CH DAC surround output for movies and 3D games. 
 - 8738-MX provides additional digital interface S/PDIF IN/OUT (44.1K and 48KHz). 
 - Built-in 32ohm earphone buffer. 
 - Built-in 2CH 16bit ADC.

 - Two S/PDIF inputs for optical and coaxial connectors individually  
 - Built-in earphone buffer at front-out pings(32 loading)  
 - One GPIO (General purpose I/O) support  
 - External EEPROM Interface for SID R/W purpose  
 - Supports MPU401 MIDI UART port