hi, i'm posting my evaluation progress here, if you are not interested or you think this is not usefull for your project , just delete the post.
I'm using this space because i started here the "project" and hope that in some way you may be interested in my consideration.
I was thinking on a 4 side connector oriented to be an hybrid interface (automatic recognising) able to choose if comunicate as sodimm ddr3-4 or pci-express but don't know how, just thinking that it's possible
I'm stucking in a question: how can i manage 4 I/O rail (8 way) and how big is the device tht let me manage this kind of connection.
I'm started from the standard sodimm interface, so long side is 6.76 cm (suppose that board is aboout 2 mm thikness so the other 2 dimension of the connector are around 6 mm) and handle 204 ddr3 or 256 ddr4 pin (on dual side printed board).
I was thinking to add 2 or 4 pin tht can manage the address of peripherial board (bus address) it may help to redirect information between peripherials.
With the risk to be boring and inconsistent i just remember tht i'm mechanichal graduated and i'm a bit far from programming so forgive me if i'm reasoning on wrong basis, just underline my fault and maybe we can solve together.
the image refers to the connector in the previews posted images just to figure out my point of view.
ADD
A piece of my thought already realized (maybe it's an allucination)
on mouser ka-ro-tx25-28-COM