Advanced Micro Devices (AMD) announced availability Monday of its mobile Athlon 4 processor 1500+, the company's first laptop processor without a clock-speed label. The new processor runs at 1.3GHz, according to an AMD spokesman. It dethrones the mobile Athlon 4 1.2GHz as the chip maker's highest-performing processor for mobile computers. Compaq already offers the processor as an option in its Presario 700 notebook series for customers ordering online, according to the company's Web site. AMD started labeling its chips with model numbers instead of clock speeds last October, a move the chip maker dubbed the True Performance Initiative. The company says its chips can handle more work in a given clock cycle than those of archrival Intel, making megahertz an inaccurate measure of comparison.