The fastest single threaded, non overclocked, commercially available cpu was the Intel i3 7350k. I haven't seen anything bench faster than a system set up for

The fastest single threaded, non overclocked, commercially available cpu was the Intel i3 7350k. I haven't seen anything bench faster than a system set up for that machine on a business board. I think now with advancements such as AVX (the newer versions that chips like atoms don't have) the 7350k can be viewed as a power hungry pig. I'm not sure though. The systems I purpose built using those CPUs still work great, no real significant performance issues even with current software and web. And they can use a single battery UPS. I still have a 16 core 5950x, that is 10% faster than the 40 core xeon box it replaced, at 1/4 the wattage at the wall as my main machine.