I have two monitors I'm trying to set up on my old PC in Windows 7. My system is running two EVGA 560ti in SLI, with a mini-HDMI to HDMI going to the newer Viewsonic, and Mini-HDMI to DVI going to the older Dell monitor. I can get them to both display, but then if I let the system sleep, the primary monitor bugs out and goes black. Sometimes I can get the screen resolution window up on the secondary monitor, and when I can, I can usually get the problem resolved by changing the primary to portrait and back again, or changing the resolution. The other way the screen goes black is if one of the monitors is unplugged from the input, and I plug it back in, it will make the other monitor go black. What the heck is going on? I've reinstalled the video drivers twice.