you think I should up the voltages for the FSB then?

I was running my RAM at 2.1v (the rated voltage) but pushed it up to 2.2v to try to get it stable.

I put my FSB to the lowest non-auto setting, which I think was 1.2v

Not enough then? Getting a 400mhz FSB using an E8400 definitely needs more power then?

I can't shake the feeling I'm doing something ridiculously stupid with the settings somewhere. Should I be using SPD for my RAM or inputting my own timings? Do you think that could be what it is? Everything runs great at 333mhz FSB