Handy m8, I have a simular problem with Hardware Doc' on my Abit mobo, says Rambusv is low, but m/c works fine. All I did in end was change 'range' down from 2.5-3.5 to 2.0 to 3.0v (it used to sit at 2.45v) and save settings, memory runs fine and Abit tech support said this was OK.
hope this helps.