We measure system-wide power draw from the wall while running the 3DMark Time Spy stress test for 30 minutes.
Lastly we come to power draw. It's no surprise to see the Aorus 5700 XT using its OC BIOS pulling the most power, at over 350w for total system power draw in our testing. Switching to the Silent BIOS dropped power consumption by about 20W, which incidentally was almost identical to that of the Gaming OC. Considering the extra clock speed both cards offer over the reference design, I'd say these results are as expected.