I have a Gigabyte 7870 card and im trying to get eyefinity setup. I can get any 2 of the 3 monitors to work but not a 3rd. Monitor 1 has DVI - HDMI, monitor 2 has DVI - DVI and monitor 3 has HDMI - mini Display port. All 3 monitors are the same and 1920 x 1080. All 3 work but when i conecet any one as the 3rd monitor the other 2 go blank and then come back on but not the 1 i just put in. All 3 monitors are up on the PC and Catalyst but only 2 will work. What am I doing wrong?