No multiple laptop manufacturers had this same issue. Toshiba and Sony were two of them. Heat was the cause but it was operating within the specs of the GPU manuafacturer. The issue that soured NVidia with these manufacturer was when it came to fixing the issues they told them to go suck it. Example when Seagate had an entire batch of 2.5 drives dying within a year of manufacturing, they worked with Apple and HP to get them replaced and the cost was shared by both.

Also NVidia has issues with their driver development and refuse to let Apple have a say in it.