I have mid 2014 retina macbook pro with nvidia 750m. Im trying to run a gtx 970 on an external monitor. It works fine in os x. In windows (bootcamp), if I boot up without the displayport cable plugged into the gtx 970 then my internal screen comes on and I can see in device manager both the 750m and 970 being detected with no issues. Whenever the displayport cable is plugged in both my external monitor and internal monitor go black with the mouse flickering occasionally. This holds true if I boo