Depending on workload, pure core count can be irrelevant when your interconnect is trash and you have no shared memory. You might see OK performance if the inte

Depending on workload, pure core count can be irrelevant when your interconnect is trash and you have no shared memory. You might see OK performance if the interconnect somehow supports RDMA, but that seems exceedingly unlikely. Almost all these cluster boards are using gigabit ethernet interconnect. Not to mention you spend a core or more per SoC to handle your os and interconnect/network interrupts. NEON is implemented on a per-core basis, not as a separate coprocessor. Every A53 (and your handful of A72s) supports NEON. I'll give you the GPUs... if you really want to put in all the effort for that sweet sweet OpenCL 1.2 action on an out of date vendor kernel. An RK3399 cluster, and a single many-core system is a nonsensical apples to oranges comparison.