The SiS645DX is without question the most versatile Pentium 4 chipset available. It offers the ability to run at least six unique RAM / CPU clock settings with very little effort. When using a Northwood P4 and some fast DDR ram you are able to run the FSB at 533MHz and ram at DDR400. This combination shatters all RDRAM based systems and also really starts showing the power the P4 has against AMD systems. In short the SiS645DX is an easy to use chipset that offers versatility that is not available from the VIA or Intel offerings. This is a chipset that will really help bring Intel back into the enthusiast market. Good job SiS in legally bringing consumers a chipset that offers so much for a great price.