WD561 0WD561 CN-0WD561 275W DELL OPTIPLEX GX620 SFF POWER SUPPLY H275P-00 - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
Dell NPS-220BBA - 220W Power Supply for OptiPlex GX520 GX620 SFF XPS 200 Dimension 5100C 5150C - CPU Medics
275W 24 Pin Power Supply PSU SFF for Dell Optiplex GX620 740 745 755 RM117 PW124 - Walmart.com
N8373 0N8373 CN-0N8373 275W For Dell Optiplex GX620 SFF Power Supply N275P-00 - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
0H275P Dell 275-Watts Power Supply for OptiPlex GX620 740 745 755 SFF
Dell M8805 Optiplex GX620 MT 305 Watt Dual SATA Power Supply - ServerSupply.com
CX305P-00 Dell 305-Watts Power Supply for OptiPlex GX620
Tested Working For Dell Optiplex GX620 280Watt Power Supply X9072 0X9072 L280P-00