ECS Z270-LIGHTSABER User Manual page 26

2. U2_MINI_SAS: U2 Connector
This connector is used to support the SSD device.
3. SATA3_1~6: Serial ATA 6GB/s Connectors
SATA3_1~6 connectors are used to support the Serial ATA 6Gb/s device, simpler disk
drive cabling and easier PC assembly.
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