Are you looking for some sort of pci-e extender?
You could build one if you had to...it's simple tech.
Very simple i know that
But I'd like to buy quality built ones.
I'd like these for server cases.
I want to be able to cut a hole, or use one in the back already there, moun tit for 7 external ports and 7 or 14 internet (splitter version would be nice)
So that internally of the case you could run all the power lines for the gpus.
Then externally you can mount your server psu and run the wires to the outside of the case.
In theory it's a double sided pcb and 14-21 pdi-e ports on it with heavy trace runs.
Super easy to build and nearly zero prototyping really needed.
But I would like a well built stable version. instead of a home made crappy version if that makes sense?