ASUS P5ND2 SE 1-29
3. Serial ATA connectors (7-pin SATA1, SATA2, SATA3,
SATA4)
These connectors are for the Serial ATA signal cables for Serial ATA
hard disk devices. The current Serial ATA I interface allows up to 150
MB/s data transfer rate while Serial ATA II allows up to 300 MB/s data
transfer rate, faster than the standard parallel ATA with 133 MB/s
(DMA/133).
4. Audio connectors (4-pin CD, AUX)
These connectors allow you to receive stereo audio input from sound
sources such as a CD-ROM, TV-tuner, or MPEG card.