I installed na newest BIOS for the board,but didnt hepled.
When all settings are on auto,with fresh BIOS,the cpu voltage shown in cpu-z is 1.248.Then i change the fsb to 400,cpu ratio to 8,cpu voltage to 1.4 and the pc loads Windows,but 10-20s after that freezes.With my old board the system was rock solid with this settings.
Than i lower the cpu ratio to 7 (2800Mhz) and keep other setting the same.Windows loads and when i look in cpu-z voltage is 1.216.After that no matter what voltage i set in bios,even on auto,cpu voltage in cpu-z alway sits 1.216.Strangely the pc i stable with this combination,at least it doesnt crash.
I searched the whole web,but no one seem to have suck problem.Weird.
I even posted to asus tech support,but they didnt helped much
"Sir, we suggest you to set the 1.4v in the BIOS, then save&exit, reboot the pc, enter the BIOS again to detect whether the CPU voltage is still 1.4v or others?
You can also try 1.3v to test."
This is for now,i'm still testing it.If someone have any suggestions...