7.
Serial ATA 6.0/3.0 Gb/s connectors (7-pin SATA6G_1-2 [blue]; 7-pin
SATA3G_3-6 [black])
These connectors connect to Serial ATA 6.0Gb/s or 3.0 Gb/s hard disk drives
and optical disc drives via Serial ATA 6.0Gb/s or 3.0 Gb/s signal cables.
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Chapter 2: Hardware information