S - SATA Connectors
Part Number: 4006181RIntel (Coconut Creek) 945GC Motherboard

SATA connectors These are the four Serial ATA (SATA) connectors on the motherboard. One SATA device can be plugged into each connector. These connectors support a maximum transfer rate of 150 MB/s per connector.

The connectors are identified by markings on the board as SATA0 - SATA3.