Hi, sounds like ur house is haunted, but to the problem is your ram set a 2.0 volts? if its at 1.8 try raising by .2volts (only do if ur ram supports more than 1.8 volts). Next try unpluging all non-essential thinks like printer modems/ tv cards. the reason i say this is i had BSD from a old TV card, and once removed and drivers the problem went away.