2012 15" Dell Vostro 3560 (HD7670M) [2nd,2C,M] + GTX 1060 @ 4Gbps-EC2 (EXP GDC 8.5) + Win7  

Here's my setup:

1. Dell Vostro 3560:
   • CPU: Intel Core i5 3210M
   • RAM: 16 GB DDR3 (8+8)
   • Disc: 1TB SSD + 1TB HDD in DVD-Rom tray
   • OS: Win 7 sp1 x64)
2. EXP GDC 8.5 Beast connected to ExpressCard slot
3. 600W ATX PSU (yes, it is over-powered, but I've already had it  )
4. GPUs:
   • eGPU: nVidia GTX 1060 3 GB (from Gigabyte), driver version 461.40
   • iGPU: Intel HD4000, driver ver. 15.33.48.5069
   • dGPU: AMD Radeon HD 7670m, uninstalled and disabled

Yesterday I've finally successfully connected GTX 1060 3 GB via EXP GDC v.8.5 Beast to my Vostro 3560 (i5, 16 GB, Kingston SSD 1TB, Win 7 sp1 x64) using ExpressCard slot. The video outputs to laptop internal display.

To make it working I've done the following:

1. Uninstalled AMD GPU driver and software with DDU.
2. iGPU will get stock driver via Windows Update. You can also install it manually.
3. In Device Manager disabled AMD GPU and PCI-e port it is connected to. Just switch Device manager view to "Devices by connection" (Menu-View-Devices by connection), then search for AMD GPU and disable the PCI-Express port it is connected to.
4. Shut down laptop
5. Connect EXP GDC with PSU and GPU connected. Check both switches on EXP GDC are on Off (default) position.
6. Start laptop. OS should see the new GPU and try to install drivers for it. You can let it do it or cancel and install driver manually (my option).
7. Reboot laptop to finish driver installation.

Error 43 with nVidia cards:

If after these steps you see error 43 for your eGPU in Device Manager, download nvidia-error43-fixer and run it. The screen may blink during the script run - it is normal. After script reports it has successfully done its work I recommend to reboot laptop and check eGPU status in Device manager.