ECS B85H3-M User Manual page 22

3. ME_UNLOCK: ME Unlock Header
4 & 5. SATA1~6: Serial ATA connectors
SATA1~4 connectors are used to support the Serial ATA 6.0Gb/s device, and SATA5~6
connectors support the Serial ATA 3.0Gb/s device, simpler disk drive cabling and
easier PC assembly. It eliminates limitations of the current Parallel ATA interface.
But maintains register compatibility and software compatibility with Parallel ATA.
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