Advanced Micro Devices, Intel's major competitor in the PC chip industry, has released a new chip set that allows PC manufacturers to offer machines with clock speeds of 1.2 GHz, 1.13 GHz, and 1.0 GHz. Intel already has chip sets capable of 1.0 to 1.2 GHz. Prices of PCs with clock speeds over 1.0 GHz are expected to drop within a few months now that PC manufacturers have two suppliers of fast chips.