howdy
You seem to know your shizz, science-wise! I've been under impression that, while chilling cpu and rig with liquid nitrogen is all good, wouldnt it be better to basically immerse one's entire rig in the chilly stuff, including HDD, psu, etc, but excluding optical drives etc?
Reason why is the entire setup should become a superconductor, so it'll never lose any charge due to heat resistance, so couldn't one keep cranking up the voltages etc to what an actual power outlet can provide? also the hdd is airtight, so shouldn't be a problem, unless it interferes with the magnetic scribing etc.
This is just specualtion, not focussing on other issues like frequencies emitted, insulations against thereof, etc etc.
Just a few thoughts.