I have setup exp GDC beast with the mPCIE connector a few years ago. Worked well but the backplate of the laptop is always open.
Now we have graceful options where we can connect the eGPU to the Laptop or MiniPC through TB4/Oculink port without removing the backplate.
I am currently trying to build a cheap Oculink eGPU setup using
this kit which costs Rs 7k but still have to receive it. Have a spare psu and GPU and a minipc with Oculink port. You can see these setups at ETA prime youtube channel.
Now, If this works then I will try to add the oculink port in one of the M.2 port (need to have two M.2 ports in the laptop in question) but this is in the future.
Oculink is more bandwidth and you get the full gpu perf compared to TB3/4 and cheaper too (atleast in the DIY route)
In the future I will try to acquire OcuP4V2 or Minisforum DEG1 as right now they are not available in India.
As far as non-DYI Oculink setups (which would be expensive just like TB3/4 enclosures) are concerned like GPD G1 or oneXGPU, I know a seller who imports CKDs and can get you one but I'm mostly interested in the DIY route.
What is your research on this until now ? Would love to connect.