I have an Asus Z87-A motherboard and NVIDIA GeForce GTX 560 graphics, and my monitors are both vga cables with dvi adapters plugged into the graphics card. My new monitor came with a vga cable and an hdmi to dvi cable, so I used the hdmi dvi cable to replace one of the old monitors. I realized I should be able to use all three so I connected the old monitor to the vga in the motherboard and set iGPU Multi Monitor in the BIOS to enabled, but it still doesn't detect the monitor in the motherboard. I tried plugging the new monitor into the motherboard via a spare hdmi cable, and it showed that it was detecting something but said it couldn't detect it as a display. I'm not sure if there's a specific configuration of the different plugs I need, or if there's something else I need to enable in the BIOS perhaps? Thanks!