Just noticed something, with my board not matter how i try it I can´t get past 890 MHz stable. To get there I had to put 1.34V Vcore when I try 400 MHz it posts but but it ain't stable.
Tried puttin' Vcore to 1.40 and even 1.50 but no dice. The only conclusion I can take is that the P5W doesn't like 400MHz FSB on Quads.