There shouldn't be any overheating when in S3, from what power usage ?? And they can wait to switch to S3 (and shut down the fans) once the temperature got low

There shouldn't be any overheating when in S3, from what power usage ?? And they can wait to switch to S3 (and shut down the fans) once the temperature got low enough, a bit like how with S3+swap, the computer won't enter suspend until the RAM has been copied to swap.