Please ask for support in the main DSDT Override or DIY eGPU Experiences Thread.
I have been out of the eGPU realm for too long to provide adequate support.
Here is a guide to performing a DSDT override with hopefully less misery, and setting up your computer to have your iGPU, dGPU, and eGPU working at the same time! Oh boy this is going to be fun.
This is my system specs (Fujitsu T901):
GTX 660 Ti
Windows 7 Enter