Non-gaming power consumption is a little bit higher than on other GTX 1660 Ti cards we've tested today, but the differences are slim and barely relevant in real-life.
Gaming power consumption of the GTX 1660 Ti is where it becomes interesting. With only 118 W during gaming, the Zotac GTX GTX 1660 Ti sets a new record for power efficiency. It is 2.5x as efficient as the RX 590 (which uses a 12 nm production process, too). Maximum power draw, even in Furmark, is 121 W only, which suggests the board power limit is set to 120 W (GTX 1660 Ti Default). Such low power consumption means any power supply will run the card just fine.