Learn how to tell the difference between the first revision named Xenon to the latest named Jasper, which has improved performance and lower cost.
The Jasper revision may have solved the "Red Rings of Death" problem as well as other problems but, how do you know your buying a Jasper revision console?
Its very easy, if the label on the back of an Xbox 360 reads 12.1A instead of 14.2A you got a new Jasper.