If your Xbox breaks down and gives you an E 74 error, this is what you’re paying Microsoft $150 (plus shipping!) to do to it… not to mention you will be out of commission for several weeks while your console is traveling all over creation. And keep in mind, they’re not going to replace the bulky, unreliable x-clamps or take special care with their sub-par thermal paste. In all likelihood they’ll just glop it on and squish it down without any regard to your machine’s precious guts.