XBOX 360 new heat sinks and 65nm?

The arcade is a brand new SKU so it does have the new chips. Microsoft has a 3 year warranty for all 360s but its only for the RRoD. WHen you get the new 360, there is a paper in the box that has information on an extended warranty for the 360 that covers pretty much everything for 2 years (its $60). I recommend you get this warranty because it is definetely worth it.