How can you tell when you purchase a xbox 360 if it has the 65nm chip? My current Xbox 360 fairly regualr will during the middle of gameplay stop working and an error messege says disc has become corrupt wipe with soft cloth. I have played every game I have and it does this and there is nothing wrong the cd disk. I am thinking about getting another xbox 360 so if anyone has hints on where to buy and what to buy for my next xbox that would be great. Also if anyone has any hints that can cause this to stop would be even better. I have my xbox on the lowest shelf of my entertainment center has pleanty of air flow and really does not get to hot. If there is a way to make it stop having that error messege or what too look for when purchasing another one that would be a big help thanks.