The Smart Array P400 SAS RAID controller with heat sink provides new levels of performance and reliability for HP servers, through its support of the latest SCSI technology and advanced RAID capabilities. The SA P400 is a high-performance PCI Express (PCIe) RAID controller with 8 internal Serial Attached SCSI ports in a low-profile form factor. It supports up to 512MB of battery-backed write cache (BBWC) and RAID Level 6 (ADG).