I'm having trouble getting my GTX660 to show up in the device manager. I'm using a 2012 Mac Mini with SSD, i7 with intel 4000 graphics and 8gb of ram. I first installed bootcamp which went smoothly, then booted into windows 7 with the eGPU connected. The Mac EFI boot loader would not boot with the eGPU plugged in. I then installed REFIT from OS X, which I understand prevent bios emulation, the boot loader now worked (through the HDMI of the mac mini only). Black screen on boot into windows. I tried starting from sleep as that was said to fix the issue. However the GPU does not show up in device manager, though video output works. Can anyone offer some advice on how to proceed?