This item is in good conditon and has been tested working. Please refer to the stock photo to insure the item will work for your application. This item is Dell part number MH596 (or a compatible part number).

Dimension: C521
Optiplex (desktop): 210L, 330, 740, 745, 755  
1x 24-pin ATX Motherboard Power (P1)
1x 4-pin P4 motherboard power (P2)
2x 4-pin SATA standard power connectors (P5 & P6)
1x 4-pin Molex Power Connectors (P3)
1x 4-pin floppy connector (P4)
280 Watt Power Supply
Tested good working
Condition - Used
Dell Model Number: PS-5281-5DF-LF
Dell Part Number: MH596 (or a compatible part number)