i have 3 monitors (2 samsung monitors, and one samsung hdtv) both monitors are vga only so i have to use adapters for both of them, one is from advi-i and one is from a dvi-d, the one from the dvi-d port isnt working. i know the port works because i have used it with other monitors and my graphics card is a raedon hd 7870 so i know it supports it.