We measure system-wide power draw from the wall while running the 3DMark Time Spy stress test for 30 minutes.
We also look at total system power draw, and once more there is really nothing between our two 5600 XT cards, with our meter reading around the 255W mark for both cards. That means power draw is essentially the same as the 2060 Super from Nvidia, but still significantly less than the older Vega 56.