PSU For OptiPlex 3020 7020 9020 MT Power Supply WHN49 XFXKX P2W4R RVTHD 776VT N0KPM Mini Tower 290W 8Pin 4Pin|PC Power Supplies| - AliExpress
Amazon.com: AC255ES-00 PCB050 255W Power Supply Compatible with Dell Optiplex 3020 7020 9020 Precision T1700 Small Form Factor SFF Systems : Electronics
Amazon.com: LXun L240ES-00 H240ES-02 B240AM-02 240W Power Supply Compatible with Dell OptiPlex 3050 5050 7050 Mini Tower J61WF DK87P F484X DW3M7 HT04K (6Pin + 4Pin Connector) : Electronics