A few months ago, Intel released the celebratory limited edition Core i7 8086K CPU – the first 5GHz (on a single thread) CPU Intel has ever released. These CPUs are by and large identical to the more familiar Core i7 8700K, but offer a guaranteed 5GHz clock under certain light or single-thread workloads.
Going beyond simply offering a higher frequency, the 8086K is (or was, at least) perhaps the best showing yet of what Intel’s manufacturing process can achieve. This isn’t a research-based statement, but for the most part the average 8086K has better overclocking headroom than the 8700K CPUs from which they’re derived. Some suspect that these are binned wafers, while others suggest it’s just process tuning and maturity that allows for the increase in clock frequencies.