INTEL IS LAUNCHING A BEVY of new chips today, including new speed grades of the current Pentium 4 and Pentium 4 Extreme Edition processors clocked at 3.4GHz. The biggest news, though, is the new processor core, code-named Prescott. Prescott isn't just a die shrink, though it is that. Prescott is also a major reworking of the Pentium 4's microarchitecture—major enough that I'm surprised Intel didn't opt to call this processor the Pentium 5. Read on to find out what it's all about.