Asus RS740-E7-RS24-EG - Manual (Page 74)

Chapter 4: Motherboard information 4-10
2. PSAS connectors (7-pin PSAS1, PSAS2, PSAS3, PSAS4, PSAS5, PSAS6, PSAS7,
PSAS8 [Blue])
This motherboard comes with eight (8) PIKE Serial Attached SCSI (PSAS) connectors
that supports both Serial Attached SCSI (SAS) and Serial ATA (SATA). Each connector
supports one device.
These connectors function only when you install a PIKE RAID card.