By nature HFT is not highly multithreaded and avoids handoff. So having more cores is not that different than having more discrete CPUs -- no benefits for cache

By nature HFT is not highly multithreaded and avoids handoff. So having more cores is not that different than having more discrete CPUs -- no benefits for cache locality/faster coherency. In that regard if latency is an issue overclocked 8700K (or 8086K) should be sufficient.