EGPUmaybe

Hey guys, I have been toying with the idea of eGPU for some time now, so I have been reading this forum a lot and I got to say, there is a lot of very useful information here, definitely more than anywhere else. So now I have decided to finally register and ask some questions. I am really new to this, so please bear with me and excuse any stupid questions I will ask . I need your guy's advice to know if what I want to do is possible and if it is, is it feasible, my main concern is bottlenecks in my system: 1. I want to build an eGPU for my HP Pavilion laptop, which I bought in 2015. Here are the specs that I got from Hwinfo64: Processor Name: Intel Core i5-5200U Computer Brand Name: Hewlett-Packard HP Pavilion Notebook Motherboard Model: Hewlett-Packard 8093 Motherboard Chipset: Intel Broadwell-U PCH-LP (Premium) Motherboard Slots: 3xPCI Express x1 PCI Express Version Supported: v2.0 (does that mean that my mPCIe is version 2.0 as well??) USB Version Supported: v3.0 RAM 16 Gb DDR3 Hard drive 240 Gb SSD OS Windows 10 I want to use GTX 970. I know it might be a bit too powerful for my CPU, but whatever, I might build desktop later. For external display I can use my 1080p projector, connection to Video card will be through HDMI or VGA. So I opened up my laptop and I saw what I guess is mini PCI-Express port (mPCIE). It currently has my wireless card plugged into it. So, if I understand correctly, I will have to use PE4C V3.0 (PCIe x16 Adapter) with my mPCIE slot, together with NVIDIA Optimus PCIe compression (where do I get that btw?) and that should do it right? Another way of doing it that I see is convert my USB 3.0 to Express Card via adapter (EC03 (ExpressCard 2.0 to USB 3.0) USB interface) and use the PE4C adapter with the express card, but with the research that I have done so far, it yields the same speed as my mPCIE port, which is 5Gb/s, which is also the speed that HWinfo64 is showing for my PCI-E slots. Now, my questions are: 1. Could it work? 2. What will be the bottleneck? CPU? mPCIe? 3. How much performance will I get out of the video card? Hope to hear from you guys, you seem to know more about this stuff than anywhere else on the internet.