I just got a ASUS M5A 78L-MLX (AMD) motherboard. I have 3 monitors, but my graphics card only supports 2 monitors, so with my old board, I had two hooked up to the card and one to the onboard. But I can not seem to figure out how to enable the onboard graphics. I've looked for the memory share option but can't find it. I also looked through the IG section but couldn't find something that could enable it.