It's not your megahertz that counts, it's what you do with it...AMD is to launch the latest version of its high-end Athlon chip today, which it says will out-perform Intel's 1.8GHz Pentium 4 processor. This is despite AMD's new chip only clocks speeds of 1.53 GHz. The new chip is to be launched in San Francisco today by AMD founder, chairman and CEO Jerry Sanders. AMD is trying to regain momentum in its battle with Intel after its main competitor launched a 2GHz chip earlier this year. AMD claims the clock speed is not the real performance measure of a chip, which in fact depends upon a number of different factors. The company is pushing the results of independently audited benchmark tests showing AMD's Athlon out-performing Intel Pentium chips with far-higher clock speeds. Athlon will call its new 1.53GHz chip the 1800.