I argue zero - placing AI below the value of humans no matter the energy input.
The _only_ reason an AI might be worth saving is if it, say, has a cure for all diseases, but then we're not saving it due to its intrinsic worth, we're saving it because we can save many humans. I _would_ consider the trolly problem a legitimate thing in ethics, but not if an AI were tied up on the tracks no matter how expensive it is. It's a thing. It gets run over to save any human.
What would a silicon-based consciousness desire to cause suffering?