Dell UN939 0UN939 PERC 5i/R PCI-E x4 SAS RAID Controller Card UCS-51 + Cables Dell UN939 0UN939 RAID Controller Card Sold with Cables Recommended Machine Type: Server, Workstation Compatible Part Number: MG129, UCS-51, GU186, UN939, E2K-UCS-51(b) Compatible System: DELL PowerEdge Series: 840, 860, 1900, 6950, SC1430, SC1435, SC440.