This is most likely due to an inferior AGP implementationon the AMD 751 chipset. However, these tests wererun on a level playing field. SSE optimisations were used on theP3. The Athlon is the performanceleader at the lower resolutions, with the P3 piping the Athlon at1024 x 768. This is almost certainly due to an inferior AGP implementationon current Athlon boards.
Lets take a closer look at that chart.
Its figures like this that show that not only is the AMD Athlon faster than the equivalent clocked Pentium III, it is also faster than an Intel CPU when overclocked. For those who like CPU power, and don't like to Overclock, the Athlon is the way to go for shear processing muscle. Previously AMD CPU's have showed strong performance on application scores, but tailed off badly in gaming, where FPU processing power is paramount. Now that AMD have a pipelined FPU however, the scores are excellent, and AMD are no longer suffering from compiler optimisations designed to target pipelined FPU architecture. There is no doubt that AMD have a genuinely fast CPU, and Intel must be worried.