Full disclosure. I design rugged servers that operate in temps as hot as 70c. Mostly for military applications, oil and gas, electric substations, autonomous vehicles, etc. our standard temp we design for is -40c to +55c ambient environments. 40c is pretty easy for us. 70c is a challenge but can be done with the correct component selection. We use thermal chambers to test and qualify our products. If the processor throttles when running under full load at the end users high operating temp requirement, we consider it a failure. For autonomous vehicles we do liquid cooling because they normally want AI inferencing compute to be done by multiple Nvidia GPUâ(TM)s. We run the liquid cooling loop to a heat exchanger outside the vehicle. We also design for humid environments, high shock and vibe on military vehicles, emi sensitive environments, etc.
