We measure system-wide power draw from the wall while running Cyberpunk 2077 for 30 minutes. We do this at 1080p, 1440p and 2160p (4K) to give you a better idea of total system power draw across a range of resolutions, where CPU power is typically higher at the lower resolutions.
To add to our detailed graphics card-only power draw testing, we also look at power of the entire system measured at the wall socket. Power draw for the Arc GPUs increases as we step up in resolution, peaking at 350W for the A750 at 4K. A 500W PSU should be enough to power this card.