You are in vain afraid of giving the car for warranty repairs and picking drivers for it. The fact is that any developer of an electronic circuit has the right to finalize a typical circuit for switching on a microcircuit published in the technical documentation in accordance with the tasks it solves. It is enough to put a chip instead of the one indicated on the typical wiring diagram similar in properties, but issuing other codes to the status registers so that the Generic drivers cannot work correctly with this device.
Therefore, I can assume that the video card in your machine is assembled according to the standard electrical circuit that has been improved relative to the NVIDIA partner documentation published, which led to the need to use a modified firmware for it (Video BIOS), and as a result to incompatibility with Generic NVIDIA drivers manifested in observables you phenomena.
Regarding CPU overheating, it does not require long-term operation for its occurrence, but a random violation of the thermal contact “CPU cover - radiator sole” is sufficient when assembling the machine, for example, as a result of not tightly pressing the heat sink, or errors when calculating the cooling system, for example, using a unified cooling system for the production of a family of models with different CPU's. The reason can be any, the main consequences.
But, in any case, overheating of the CPU in such a new product (in terms of life), if the user complies with the requirements for operating conditions specified in the specification, is the basis not only for contacting the manufacturer’s service center with the requirement for warranty repair, but also the legal basis for filing against the manufacturer of a lawsuit for the release and sale of a knowingly non-conforming approved specification of the final product, which qualifies as a factory defect.
And I’m sure that the manufacturer will prefer to quietly eliminate the marriage, and its representatives will catch you in the toilet with a bunch of apologies if only the matter would not end with a public scandal. After all, such a lawsuit against the manufacturer is not a desirable public scandal for him that instantly negatively affects not only his reputation, but also his profits, and shareholders in this situation will not forgive the board of directors for the drop in their income.