basic online psu calculator recommends at least 350w psu, while AMD general recommendation is 450w for RX470.  consider upgrade 990 psu to Dell 460w for XPS or Aurora, or EVGA 460-500w which would be enough.    [URL]
So i have Optiplex 990 With Mother Board (06D7TR) Processor (i7 2600) and Graphic Card (Gt 710) So i want to change my Graphic card to Rx 470 4Gb but i dont know if my motherboard can support it Please Help Me[IMAGE]
Optiplex 990 GPU Upgrade