638
Framework’s first desktop is a strange—but unique—mini ITX gaming PC
(arstechnica.com)
This is a most excellent place for technology news and articles.
Using it as cache would reduce total capacity as cache implies coherence, and treating it as ordinary swap would mean copying to main memory before you access it which is silly when you can access it directly. That is you'd want to write a couple of lines of kernel code to use it effectively but it's nowhere close to rocket science. Nowhere near as complicated as making proper use of NUMA architectures.