I doubt the S15/T15 can get 34TH at 1500W. GMO has their 7nm chips out and their Miner B3 unit is 81W per T. A lot of the power efficiency and how well it performs comes down to chip design. We know that Bitmain is bleeding money and they lost most of their best engineers. If their ASIC really was as awesome as they claim it is, they would have released some real numbers on their "teaser" release. So the only thing really they could hype about is the 7nm technology. If their chips really did 45W per T, they would have bragged about it already. Just my 2 cents.