retail card has low profile bracket so yes it would work  ASUS GT710-SL-2GD5-BRK  GeForce GT 710 2 GB DDR5 Low Profile Graphics Card   
I'll keep it simple...Dell Optiplex 790 i5 3.10Ghz SFFCan I put this in it:ASUS GT710-SL-2GD5-BRK GeForce GT 710 2 GB DDR5 Low Profile Graphics Card  Any help would be appreciated.
Dell Optiplex 790 - Graphics Card question