From the Dark Side--Pentium 4 Debuts Monday

at clock speeds of 1.4 and 1.5 according to this TechWeb article. The Pentium 4 has what Intel calls Hyper Pipeline technology, a deeper chip information channel that allows for faster clock speeds, a Rapid Execution Engine where the FPU (math unit) in the processor runs double the CPU's speed and a system bus speed of three times faster than in the Pentium III.