Hi All, I have been doing a lot of internet scouring to see if a late 2013 iMac will be able to run an external GPU on Bootcamp using the Thunderbolt 1 port and basically coming up with nothing much. I am aware of bottleneck issues but it still might be worth the increase in frame rates for gaming. Not interested at all in using a eGPU on Mac OSX, just on Windows and purely for gaming. I want to use the main screen, not an external screen. Has anyone got any experience? I am getting desperate!