I only picked a few Viewperf results, because I know that the majority of you don't care too much for this high-end OpenGL-test.

In each of the three benchmarks AMD760 plus DDR SDRAM scores way ahead of KT133 plus PC133 SDRAM. Working on 3D-models with a huge number of polygons requires a huge amount of memory load and stores. I didn't include RDRAM-results here, but you can believe me that neither i820 nor i840 plus RDRAM were able to touch the performance of Athlon, AMD760 and PC266/PC2100 DDR SDRAM.