err overclocking from 333 to 400mhz is almost impossible, thats a 67mhz gain, thats like 134 mhz extra on you fsb! doing that would need some serious proffessional tools, my fsb is pumped up 100mhz extra, and i simply can not go further without some proffesional cooling and stuff

however, if your new mobo already runs at 400 mhz, you wouldnt need to overclock + i can see your old ram ( 333) struggling badly to reach 400mhz, see if your new mobo supports 400mhz