Dell PowerEdge Perc 5i SAS RAID Controller RP272 YF437 With support for RAID levels 0, 1, 5, 10, and 50 PERC 5/i provides multiple protection options to suit a wide range of applications and non-critical data. It uses 3 Gbps SAS technology, which can deliver nearly four times the bandwidth of 320 MBps SCSI. PERC 5/i SAS connectors contain four SAS ports each for a total bandwidth of up to 12 Gbps, or 1200 MBps per connector. It also includes a powerful Intel IOP333 processor with XScale Microarchitecture, 256 MB of DDR2 memory for read and write cache and battery backup designed to provide up to 72 hours of protection