The power supply from Dell provides reliable power for your mission-critical applications. It delivers up to 550-Watt of power. Device Type: Power supply - hot-plug / redundant - plug-in module Power Capacity: 550 Watt Manufacturer Warranty: 1 year warranty Designed For: PowerEdge R320 (550 Watt), R420 (550 Watt), R420xr (550 Watt) Device Type: Power supply - hot-plug / redundant - plug-in module Power Capacity: 550 Watt Service & Support: Limited warranty - 1 year Designed For: Dell PowerEdge R320 (550 Watt), R420 (550 Watt), R420xr (550 Watt)