The astute observer will notice that the clock speed race between the rivaling companies has practically come to a standstill. AMD and Intel now try to work around this fact by using more and more cryptic product naming systems that hide a processor's actual clock speed.Read on over Tom's Hardware Guide.
In an overclocking test performed two years ago, our lab in Munich already succeeded in pushing a Pentium 4 to 4 GHz with conventional air-cooling methods. In a world-record attempt (our 5 GHz project), we even achieved 5.25 GHz and the world record is somewhere around 7 GHz today. Yet regular users are still not seeing these speeds..
Huge processor chart - 77 processors benchmarked

TGH has did it again. Just like the previous years they have spend lots of time to benchmark a huge number of new and old processors from AMD and Intel. This edition includes dual-core processors and lots of other things like tables comparing the evolution in clock frequency and power consumption from 1993 till now.