Ram, cpu, motherboard and pretty much all the other info you give is completely irrelevant, it's all about if the video card can handle it. And sadly the integrated on the i5 can only output 2 signals. There is a workaround with the splitter I mentioned that splits a single signal to 2 monitors but you need to make sure its not a cloning splitter. But I think a usb to dvi/hdmi adapter would be simpler. You could try that 3rd hdmi monitor on the hdmi but I doubt it'll work, then you could still use it with a usb to hdmi adapter.