There was a time when SPARC CPUs were the sole realm of pricey Sun ... The problem is you need a fairly big FPGA which isn’t always cheap unless someone goes out of business and you get lucky.

Budget CPUs have always been the favorites of value-conscious PC builders, thanks to their impressive performance per dollar. And in some cases, a cheap CPU is all you really need for your use case.

Build a powerful NAS for under $500 with used parts. No need for a GPU; a cheap CPU with integrated graphics is sufficient.