The Intel RAID Controller RS3DC040 is a PCI-Express (PCIe) 3.0, low-profile controller with RAID control capability. The Intel RAID Controller RS3DC040 uses 1 GB of DDR3 1866-MHz memory and controls four internal Serial Attached SCSI (SAS) / Serial Advanced Technology Attachment (SATA) ports through one SFF-8643 mini-SAS HD-4i internal connector.