Another thumbs up for the P3V4X. I ran one for awhile and had no real problems to speak of. I used one of the pouplar utility programs to enable 4-way interleave for the memory and the memory performance was within 10% of BX after the tweaks - according to Sandra benchmarks. I don't know why so many people bash the VIA chipset boards, as long as you are willing to tweak a little, the performance is respectable.
Sandra Memory performance: P3 550E@733 - 192MB RAM @ 133mhz - CAS 2,2,2
P3V4X, bios 1004 (I think) Memory score 325/375
P3V4X, bios 1004, beta4w for 4-way interleave, Memory Score 360/410
Asus CUBX, bios 1006 Memory score 400/450
My understanding is that 815 chipset boards do not match BX either and that their performance is about halfway between VIA and BX. Anyone have Sandra scores 815?