3 Monitors
 

I have 3 monitors connected to my PC. The main monitor is connected to the onboard video card and the other 2 are Samsung TV's using USB to HDMI convertors with Display Link software. I want to have the main display duplicated on all 3 monitors, yet I can only get 2 at a time to work. When I look on the Display Link support site it says this configuration will not work with Windows 7 or Windows 8 yet in the forum I see people using more than 3 monitors. Can anyone offer any advice? What's real?