250w Replacement Power Supply for Dell Optiplex GX270 Tower Optiplex GX280 Tower Specifications: Main Connector: 20+4Pin +12V Rails: Single Over Voltage Protection Input Voltage: 115 / 230 V Input Frequency Range: 50/60 Hz Replacement for Dell Optiplex GX270 Tower Optiplex GX280 Tower Compatible with most motherboards! Use this PSU to replace the PSU in your Dell Optiplex GX270 Tower Optiplex GX280 Tower. This unit has a 20+4 motherboard power connector, meaning you can use it with both 20-pin and 24-pin motherboard power sockets! Replaces common PC power supplies! Replace the power supply in your Dell, HP, or other compatible system quickly, easily, and with the cheapest price online that is compatible with Dell Optiplex GX270 Tower and Optiplex GX280 Tower CPU's! Replace your power supply easily! We take the hassle away! This PSU has all the connectors you need to bring awesome, steady power back to your PC!