Dell PERC H800 512MB SAS RAID Controller N743J Channel Qty: 8 (2 x 4) 512MB Memory Cache included Connectors: 2 x4 mini-SAS External Interface: 2 x SAS 2.0 / 6Gb/s ( external ) RAID levels: 0/1/5/6/10/50/60 1 year ServerZone warranty