I built a PC using the G3420 processor and its integrated graphics. The specifications show that it can run 3 monitors which is critical to my work. The Intel graphics driver is unable to detect the 3rd monitor. All monitors are different models. Is that the cause? If so, if I were to get a HDMI or other active adapter/cable would that make it work? The graphic inputs on my board include HDMI, DVI and VGA. Thank you!