yap
hd5850 - 2xdvi + 1xdp@ vga
hd5770 - 1xdvi + 1xhdmi (@ dvi) - dont have more cables on stock lol

only hd5850 rendering a graphics (hd5770 is only for display @ softTH) I can use even low end x1300 gpu for example but dont have any other that hd5770 now, except 8400GS but I have problems with monitor placement when I have NV and ATI in one pc
so without mess in OS and good working, both ati cards is recomended