I am trying to get 3 monitor to work with my Intel 4 Series Internal Chipset. All 3 monitors will display... just not at the same time. The Intel software and Windows are only showing 2 monitors in the options for Extended Desktop. I can select any combination of 2 of the 3, but not all 3 at the same time.
We confirm only two monitors can be used simultaneously. "Intel graphics products can output to one or two display devices at the same time. More than two display devices can be physically connected, but only two display devices can be used at any time." (qtd. in http://www.intel.com/support/graphics/sb/CS-031040.htm#11)