hi, i have a SAMSUNG 21.5'' LCD monitor with [VGA & DVI-D] port...........where my gpu is GTX 770 which have [DVI & HDMI].........now i can buy the DVI-D cable for display or i can go for---- HDMI (from GPU) to HDMI-DVI (monitor).....my question is! is that necessary and will i get similar performance as norman HDMI or i should go for the DVI-D only.......btw, i heard about sound issues on DVI....what is that?????