By sealed you mean enclosed but not air tight right? Air tight sealing would require a pressure vessel for electronics which i never saw both on airplanes nor o

By sealed you mean enclosed but not air tight right? Air tight sealing would require a pressure vessel for electronics which i never saw both on airplanes nor on cars. The plastic coating though, I have seen. Such coating completely changes the thermals of the electronics making the OPs claims that a home GPU could just be strapped into a car very unlikely.