Asus P7F-C/SAS - Manual (Page 45)

ASUS P7F-C Series 2-27
4. USB connector (10-1 pin USB34, USB56; A-Type USB7)
These connectors are for USB 2.0 ports. Connect the USB module cables to
connectors USB34 and USB56, then install the modules to a slot opening at
the back of the system chassis. These USB connectors comply with USB 2.0
specification that supports up to 480 Mbps connection speed.
3. SAS connectors
(7-pin SAS1, SAS2, SAS3, SAS4; Red)
(7-pin SAS5, SAS6, SAS7, SAS8; Blue) (P7F-C/SAS model only)
This motherboard comes with eight (8) Serial Attached SCSI (SAS)
connectors, the next-generation storage technology that supports both Serial
Attached SCSI (SAS) and Serial ATA (SATA). Each connector supports one
device.