There is the Dell 260W D9 Tower power supply, designed for compatible Dell tower systems, including OptiPlex tower models such as the 7071 Tower. It provides 260 watts of output power and supports an input range from 90 VAC to 264 VAC with a frequency of 47 Hz to 63 Hz. This internal computer power supply is a genuine Dell replacement part with D9 Tower form factor and an E-Star energy efficiency rating. It is designed for stable system operation and reliable performance in supported Dell desktop chassis.