It has 8 SATA interfaces (4 SATA III and 4 SATA II) and 8 SAS interfaces (which are compatible with hard disks with SATA interfaces).
Excluding SAS, GA-X79-UD7 of X79 chipset has 10 SATA interfaces (6 SATA III and 4 SATA II).
Next comes AMD's A85X chipset, which generally has eight SATA interfaces (all SATA III).