Intel Pentium 4 600 series & 3.73EE CPU -
The Intel Pentium 4 Extreme Edition processor has now moved to 90nm process. It has 2MB L2 cache but also has slightly faster clock speed of 3.73GHz and 1066MHz FSB support but is otherwise the same core as normal Pentium 4 600 series. But of course AMD Athlon 64 processors running at much slower clock speeds still give higher performance. It only needs AMD to increase the speed and they will leave Intel in their dust.