Adding Alienware Graphics Amplifier to my Desktop X51R3

I have added the Alienware Graphic Amplifier to my desktop X51R3, and have connect it to monitor by HDMI. The display adaptor in device manager can see all three graphic cards: Intel 530, GTX 1060 6GB, and now GTX 980 TI.

My Nvida control panel: is set to auto select, and balanced system. The question: The system has all three options, as long as HDMI cables are connected to the monitor, meaning I run one from desktop/ monitor and another HDMI cable from AGA/ monitor. I have not done it, I did not want to burn anything up. I just wanted to know if I have that option of keeping the GTX 1060 on the table.

Thanks