If the j/gh ratio is real, this is gonna be a game changer!

it wont be. guarenteed thats at the lowest voltage/frequency, and probably for just the chip (doesnt include regulator loss, PSU loss, other power draws like a controller/fan)
realisticlaly in a final product, this would probably range 0.28W-0.50W depending on settings (ie: similar to the Bitmain chip)