TweakTown has compared five 533FSB Pentium 4 chipsets :
Intel's i845G , Intel's i845E , VIA's P4X400 , SiS 645DX and the SiS 648 :
We have seen today that DDR-400 is a definite advantage for Intel Pentium 4 systems and that, if used, can make or break a system. DDR-333 has also bridged the price/performance gap between RDRAM and SDR-SDRAM for the Intel Pentium 4 and VIA has given its all for the P4X400 with some impressive results. Intel has still to move past the DDR-266 barrier for their chipsets. With Springdale set to introduce DDR-333 for the Pentium 4 officially, it seems too late as SiS has taken the DDR-400 market.
DDR-400 still has some way to go, after all, we could only get two out of three DIMM's on the SiS board to run DDR-400. Running three caused system crashes at any voltage we used. VIA still has quite a few bugs to get out of the P4X400 and we could not get ANY DDR-400 sticks to run on this board, not even one DIMM @ 3v.
Finally SiS deserves a hard earned pat on the back for their SiS 648 chipset. It has proven that we do not need RDRAM to have a powerful system and has given us a great platform to work on.