I bought a 780 for hackintoshing but as it is a desktop it is limited to what graphics card will run on the psu, 255 watts I think.
What can I get away with that will work without major modding the machine as it has 4gb ddr ram, a 3 ghz core 2 processor but basic graphics.
I have seen what specs were around in 2010 (4 series radeon), and there are later specs on Dell for 2013 (7 series Radeon)
DELL OPTIPLEX 780 DESKTOP
E8400 3GHZ CORE 2 DUO PROCESSOR ... BUILT IN GRAPHICS INTEL GMA 4500
1 X 4GB DDR3 RAM
160GB HARD DRIVE
PCI 16 EXPRESS LOW PROFILE SLOT FREE