Help choosing PSU

edited May 2020 in Help Choosing Parts
I have a Dell Optiplex 790 (exact model in pic below). I put in a GEFORCE GTX 1050 Ti Low Profile and after a while my power supply seems to have died. I'm trying to replace it, but every time I look up PSU upgrade for the 790, the 790 I have doesn't come up. The 1050 requires at least 300w itself and I just had a H250AD-00 PSU which is only 250w. Which PSUs, the size of the H250AD-00, are able to run my setup? Any help would be greatly appreciated.


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