3800 is the Turbo speed.
Um yeah but should It not idle at 1600, pop to 3400 at load, then finally push 3800 when stressed?
or is it because i set "Ai Overclock tuner" thing to "X.M.P."in bios? which according to manual saids "If you install memory modules supporting the extreme memory profile(XMP) technology, choose this item to set the profiles supported by your memory modules for optimizing the system performances." Which actually is not that descriptive.