Review on Genuine Dell 265W Power Supply Unit PSU for Optiplex 390, 790, 990 SMT Small Mini Tower - Compatible with Part Numbers YC7TR, 9D9T1, GVY79, 053N4, D3D1C and Dell Model Numbers F265EM-00, AC265AM-00, L265EM-0, H265AM-00, L265AM-00 by Roman Starr

The Dell Optiplex 790 series power supply is notorious for its early failure. It was easy to find an issue discussed online where my 790 wouldn't turn on and the power button was flashing amber. This is just the right, perfect power supply for the 790 in a mini-tower configuration. The replacement only took about 15 minutes and all the necessary power connections were supplied with the correct plugs. It was a very inexpensive way to get your computer up and running in 72 hours.