I have the R9 280, i have 3 different sized monitors, 1 of them i have Mini Display port coming from my card converting to HDMI, on my second monitor i have Mini display port from my card coverting to DVI-D on my monitor, on my third it is straight DVI-D to DVI-D. I cannot get all 3 monitors working at the same time. I can only have 2 of them at a time, as it disables one, then turns the other on. I would love to know why this is and if there any solutions. Thanks