Tbh though, most of the more interesting So7 boards had non-Intel chipsets. At the time, the i430FX was spectacular, single-handedly making the Pentium faster than 486 at last, with i430VX pushing the envelope a bit further and the expensive i430HX offering unheard of RAM support. Then the i430TX came along and was rather underwhelming. In retrospect though, the i430FX and VX are common as muck with little to commend then, the i430TX is a solid reliable performer, but very non-Super in the SS7 era, leaving only the i430HX as interesting, at least, if you have one with a second TagRAM. Also, none actually introduced any new features to the platform, except the i430VX adding SDRAM support - yet it was slower than EDO on contemporary i430HX and SiS5571. Some, like linear burst, AGP, UMA and dual-channel memory controllers, never made it to Intel So7 chipsets, others, like EDO, SDRAM and UDMA support were introduced by other vendors. Finally, the absolute performance crown, both per MHz and overall, was earned by non-Intel chipsets.
For interesting stuff, I'd go for the OPTi Viper-M (first to support Linear Burst), Via chipsets' extreme memory flexibility (any number of SIMMs, any slot - even a single 72p SIMM would work), SiS' pioneering UMA designs with the 5511+6202 and later integrated into the 5598. Performance was shitty, but this was bleeding-edge at the time. Finally, ALi's Aladdin IV was the fastest chipset per MHz, and people are still arguing about whether the Aladdin V or MVP3 is the fastest overall chipset, although I suspect that the dual-channel SDRAM controller of the Aladdin 7 might beat both...