DELL 0TKK9K Perc H355 Front 12gb 16 Ports Pcie Gen 4 Sas/sata Raid Controller. Interface Support : 12gb/s Sas, 6gb/s Sata. Pci Support : Pcie Gen 4. Sas Connections : 16 Ports- 2×8 Internal. Cache Memory : No Cache. Raid Levels : 0,1,10. Max Drive Support : Up To 32 Raid, Or 32 Non-raid. Raid Support : Hardware Raid.