Your math doesn't make sence in real world. Either he run his 1070 at 100 or 150 wats PL, the hashrate for ETH will not increase, it will remain at 30-31 MH/s. So he is effectivly saving 50 watts per card while getting the same hashrate, what's wrong with that?
There is exactly 0 chance that you can cut the power consumption of
any electronic component and receive the exact same output. If you could, Bitmain would already have an S11 on the shelves that uses 1 watt. If my math fails to make sense to you, it's likely because you don't even math, bro.
Which part of my post you didn't understand? Which part of other people posts responding to you, you didn't understand?
Just because the card can run at 150 watts (that is when running 3d intensive calculations, eg. playing games) doesn't mean that ethash algo requires the card to run at full power to achieve max hashrate. You better get your facts straight before resorting to insults!
Ethash doesn't require GPU core to run at max power, it is barely even using it... ethash is memory intensive algo and it is pushing mem to its limits but not the core, hence the low PL is possible without affecting the hashrate. Once again, why waste more power if there is no gain?