i tried that before.seems like that multi adjust only the htt. i will wait for new bios.the problem is that i cant raise the mem speed more than 460(920Mhz) because it doesnt even post if the NB freq goes higher than 2400Mhz(currently 2375Mhz).so now i have 12.5x238 2375Mhz both htt and NB vcore 1.30V very stable.