tempywempy

At any point in all the issues you (sadly) encountered, were you able to get the internal LCD working with the eGPU in either OSX/Windows?

CONFIGURATION

• Apple MacBook Pro 15" Retina / 256GB / 16GB (Mid 2014), with Iris Pro graphics only
  
• AKiTiO Thunder2 PCIe Box
  
• Silverstone Strider ST45SF-G 450W 80+ Gold Modular Power Supply (v. 2.0)
  
• Self made connector to power up PSU ("paperclip trick")
  
• EVGA GeForce GTX 780 6GB SC w/ EVGA ACX Cooler
  
• Apple 2m Thunderbolt Cable
  

SOFTWARE INSTALLING

1. Install Windows 8.1 64 bit from a USB stick by using ISO file. This is a standard Boot Camp installation.
   
2. After installing Windows, download and install all Windows updates.
   
3. Update Boot Camp drivers (Boot Camp Support Software 5.1.5640) and shut down
   
4. Do the hardware preparing part 1-8
   
5. Install Nvidia driver 340.52 (Drivers | GeForce)
   
6. Shut down MacBook Pro and continue from the hardware preparing step 8
   

HARDWARE PREPARING

1. Open AKiTiO's box by a normal screwdriver, take out the PCIe board and attach the GPU to its x16 slot
   
2. Attach PSU's power cable (blue) to the GPU and do the "paperclip trick" as shown in picture 1.
   
3. Attach DVI/HDMI cable to the GPU (if using a back bracket, I wasn't able to fit DVI-cable because the plastic part was too wide) and use any external monitor you like (4K would be nice to test with this setup)
   
4. Place something under the GPU so that it will be steady (a removed front panel is perfect for this)
   
5. Attach AKiTiO's 60W power plug to the DC jack of the PCIe board
   
6. Connect TB cable
   
7. Power up AKiTiO's box (green light should appear) and the PSU at the same time (I use a power strip with a switch on the floor)
   
8. Turn on MacBook Pro (blue light should appear). If it is booting to OSX partition, change startup disk to Boot Camp partition from the OSX preferences.
   

...

I really like this setup, you have the portability of a laptop combined to higher end graphics at home. There might be a workaround for OSX as well that I will test some day.

@goalque

& @Nando8, @Call and @entzoe (due with your vast knowledge)

I've been a lurker now for quite some time. Due to the fact I probably have the worst rMBP (Late 2012, 15" 650M) model, I've pretty much read and concluded that eGPUs are not in favor (in terms of using internal LCD, which is all I'm actually interested in).

However, another thing I'm only interested in is using OSX for gaming (I play a lack many games) and enjoy using OSX doing so, just wish/want a more powerful card. That being said, is it possible to use this same setup for a Late 2012 15" rMBP w/ 650M with internal LCD (gsxstatusswitcher/optimus/etc)? I'd rather NOT deal with windows seeing I already have to do that for a living already...

Man what I wouldn't do just to have a OSX eGPU w/ internal display. Might as well start curing cancer... ::sigh::