macOS was drawing 40 watts more than Windows

[elptdbi3lYI]

I started digging around and stumbled across this post https://news.ycombinator.com/item?id=22265656 which suggests that certain resolutions causes more power draw, so I tried changing resolution to 1080p instead of 1440p (native) and to my surprise power draw decreased by almost 40 watts.
Long story short, the cause seems to be monitor timings, once I overrode EDID to use CVT instead of CVT-RB computer draws 40 watts less even on native resolution and so idle power usage is around the same as Windows now.
If you see big difference in idle power draw on your dual boot machine this may be the solution you're looking for.

 

[solouki]

Hi,

Thanks for the information.

May I ask what computer? And what FPS (frequency) you were using?

I believe this may not be too surprising since, after looking up the VESA-2013 standards, it appears that CVT reduces the data rate required by CVT-RB by 40% (1440p -> 1080p).