HandBrake shows us that Intel's new 6-core processors are very strong with Hyper-Threading, but we should also remember that while the i5-8400 has six real cores, the 7700K has eight virtual cores with a higher frequency.

ScienceMark really likes AMD's memory controller, and it also likes the 8700K versus the 7700K and its clone, the 7740X. While the 8700K has the highest single core turbo boost of all the processors in the charts, it doesn't steal SuperPI away.

While SuperPI is single threaded, I don't peg the benchmark to the highest core, so it can jump around depending on what else is running.