I have a MSI R9 270 Gaming OC that I use to drive three Dell Ultrasharp 1908FPb that run at 1280x1024 in eyefinity. They are connected using one DVI-D, one HDMI-DVI-D, and one DisplayPort-DVI-D. This has always worked for me. I unplugged everything from my computer to move it somewhere and when I set it back up with only one monitor, it wasn't to happy, but I mananged to get it to work. When I went to put all three monitors back, two would turn on for the POST like always, but then all 3 went to sleep. The only way I could get them to wake up was to unplug the HDMI one, which left me with two working fine. When I plugged the third back in, all three went back to sleep. I've tried restarting my computer several times but nothing seems to help. Any help is greatly appreciated.