Intel DH87RL can't display my thrid monitor

Version 1

    My computer used Intel DH87RL mainboard, i7-4771, 16GB RAM. Windows 7 64-bit Enterprise.

    I use three same model 19" monitor (AOC 1960R) is connected the onboard display  -  DVI, DP to DVI, HDMI to DVI. I want to use extend dsektop with any 2 monitors. It works. However, when I want to extend desktop with 3 monitors. I click Apply. It pop-up the warning message "Unable to save display settings.". How can I do? I have updated the latest driver.

    I have uploaded the DxDiag information. Anyone can help me please?