When it comes to the speediest CPUs in the game, Intel are leading the way. The i9 range is all very powerful, but the very fastest is the i9-13900KS. This is a seriously mega processor which reaches a speed of 6.0Hz without overclocking. It features 24 cores and 32 threads. Most people will not need this CPU, but if you're running massive programs, it might be worth taking a look at.