as you will see shopping, they are all different. even within models, we will use the 7870 the xfx 7870 (refrence model)
has 2 dvi, 1 hdmi and two midi display ports,Sapphire 7870
has 2 dvi, 1 hdmi and 1 full size display port. some come with adapters like the saphire comes with a dvi to vga adapters and some low end cards do not. you should pick one according to youre needs.