The Nexus 6P is a great device, but like many other devices it has a mechanism built in to slow it down slightly if it starts to overheat. This can be fixed! "Gorgtech" has posted a full guide showing how to disassemble the Nexus 6P, and mod the device for optimal cooling.
This guide is pretty lengthy and is not for the faint of heart. You should have some experience with projects like this. If this will be the first time doing something like this be sure to follow directions. This WILL void your warranty. You will be leaving some traces that you were inside of the device so if something happens and you need to make a warranty claim you will be up a creek. Head to the link below for the full guide.
Article by: DroidModderX