FPU-Performance 3D Studio Max 2
It's an old story that Athlon really destroys Pentium III in this benchmark. It used to be the other way around in the days of AMD's K6-family of processor.
The difference of price-performance index between Athlon and Pentium III is particularly impressive here. You get more than double the floating point processing power for your money if you chose Athlon over Pentium III.