XPS 8950, using SATA 3 port for SSDHDD four drives

Gigabyte the only one left allowing for discrete SATA port disabling sata slot The sata port multiplier supports 6-port SATA II interface; Compatible with SATA II interface 3Gbps Hard Drives; Support partialsleep power saving mode sata 3 slot The sata port multiplier supports 6-port SATA II interface; Compatible with SATA II interface 3Gbps Hard Drives; Support partialsleep power saving mode

sata slot Your motherboard may use two SATA controllers, the one that is part of the chipset, and a secondary controller from a company like ASMedia