The Bitmain Antminer S21 200 Terahash Bitcoin Miner is incredibly power efficient at just 17 watts per terahash.
Running on low power mode, it will only draw 2600 watts from the wall while still yielding 160 terahash of bitcoin mining. At full 200TH speed it will pull 3600 watts instead.
I pulled mine apart to see what was inside. Full video on the channel.