Apologies for starting a thread on this but I recently purchased a xbox360 250GB bundle with the sky rim DL code and basic forza4 game. When a game is running or installing the DVD drive has a really loud hum and when i feel the top of the console the vibration seems too extreme coming from it which is a lot louder that the noise my old glossy slim had. I have already had one exchange through amazon and the new one exhibits the same noise si I can only imagine that it's normal. Has anyone else encountered this.