For testing power consumption, we took our test system and plugged it into a Kill-A-Watt power meter. For idle numbers, we allowed the system to idle on the desktop for 15 minutes and took the reading. For load numbers we ran Battlefield 1 at 1920 x 1080 and recorded the peak power number while gaming a particular level that we test on each card. Our idle numbers are high, but keep in mind that we are using a workstation motherboard that has two 10GbE ports and other high-power draw controllers on it.
Power Consumption Results: The NVIDIA GeForce GTX 1070 and 1070 Ti use around the same power at idle, but at load we saw the Ti models using about 10-20 Watts more power. This makes sense as the GeForce GTX 1070 Ti is rated at 150 Watts for graphics card power and the new 1070 Ti is rated for 180 Watts of power. We hit 371 Watts on the GeForce GTX 1070 Ti versus 444 Watts on the Vega 56, so NVIDIA is still the leader for performance versus power efficiency.