I have an Ati Radeon HD 4670 installed in my pc, and I am trying to get dual monitors working on it. But whenever I plug in my second monitor the computer shuts down, and when I restart it with both of the monitors plugged in it uses the integrated graphics. I think it may be my second monitor, because whenever it is plugged in alone, it does the same thing...though if I use the integrated graphics, it works fine. What can I do to fix this? My second monitor is a Gateway EV700.