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.
Dell OptiPlex GX620 305W Power Supply 0M8806
NH429 H280P-01 L280P-01 PS-5281-5DF-LF PSU for Dell Optiplex GX620 330/740/745/755 Desktop Power Supply - AliExpress
NPS-220BB - Dell NPS-220BB 220-Watts Power Supply for Optiplex GX520,GX620 - serverevolution.com
Dell H220P-01 - 220W Power Supply For OptiPlex GX620