Now, considering that we are going to run this setup fan-less, we are going to need to make sure that maximum thermal transfer is occurring to the heat sinks of the NB/GPU and any other components. Sorry J&W! - I'm not saying you are not good enough, but we need some proper thermal gunk for this job.
The power transistors here are attached to their heatsink by a combination of thermal pad and ceRAMic paste.
Giving the heatsinks a good old clean up with some trusty TIM Clean, making everything smell citrus fresh.