PW124 0PW124 CN-0PW124 275W For Dell Optiplex 755 SFF Power Supply D275P-00 - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
F280E Dell 280-Watts Power Supply for OptiPlex 755
Dell PS-6311-6DF1-LF - 305W Power Supply for Dimension E310 E510 E520 E521 Optiplex 755 760 780 960 - CPU Medics
MM720 Dell 280-Watts Power Supply for OptiPlex 755