[salawat]

Well... No one is stopping you from pulling the Beowulf maneuver. I.e., duct-taping a couple together. Via UART/USB/I2C/Ethernet.

It isn't as sexy or prone to looking cool, but technically it is possible. I'm actually planning on trying to tinker a traditionally networked cluster that I?m going to evolve to an attempt at an SSI'd cluster.

That's really all what most Integrated Circuits are going to mowadays. Just take a few ALU's, clock circuits, register files, Memory, some caches, a few MMU's, connect it all with buses, fab x gang bustahs and you've got a new system. The toughest part seems to be getting someone to be frank with you and just giving you an accurate datasheet/not screwing you with locked down firmware and rent extractiom arramgements.

[Iwan-Zotow]

You could get akready packaged solution

https://www.picocluster.com/collections/raspberry-pi