i built my computer myself, it's not built by manufacturer.
there is no spread spectrum option in my bios, i just disable speedstep/eist, set pci frequency to 100, and set my fsb/multiplier/ram multiplier/voltages.
with my previous cpu i did all this, and it oc'ed normally.
my bios version vas F2, a few days ago i updated it to latest (F5), but that didn't help either.
when i raise my fsb, even for 5mHz and save bios settings, it restarts, tries to turn on for a second, then turns off again (that's when it resets bios to default, i suppose), and turns on with all settings to default.