I have a Asus P8Z86 Motherboard and a AMD 6870. I have two monitors attatched to the DVI of the 6870, and I want to attach another to the VGA port on my motherboard. I have tried that, and it did not work, because in Windows, when I try to enable the third monitor on the mobo, I get "Unable to save display settings".
I have looked in the BIOS and found the "iGPU Multiple Monitor" setting and enabled it, but that did nothing.
How can I use both the two ports on the graphics card and one on the monitor?