The first thing that comes to mind is the raid array. Sometimes by default the bios will dedicate x amount of RAM to a raid cache, even if you aren't using raid. Check your bios closely and see if this might be the problem. Nothing else comes to mind right off hand.
Insanity: Doing the same thing over and over and each time expecting a different result.
Democracy is 2 wolves and a lamb voting on the menu. Liberty is an armed lamb protesting the electoral outcome. A Republic negates the need for an armed protest.