Historically, Intel processors work best with Intel chipsets. There was a brief period where VIA captured some of the Pentium III chipset market, but that was short lived. In the Pentium 4 world there haven't really been many real mainstream alternatives to Intel's own chipsets, that is until very recently. SiS have had a Pentium 4 licence since the very beginning, though it has taken the company a long time to shed their image as an 'economy-oriented' provider and release a competitive Pentium4 core logic for the tue masses. The SIS645/FX, SIS648/FX and now SIS655/FX/TX have all been good chipsets which do easily rival their Intel counterparts in performance, but yet, consumers still aren't familiar enough with the SIS name to flock towards boards based on its' chipsets - even when they do reveal remarkably competitive performance figures.