I'm measuring at the wall with a kill-a-watt. Its certainly possible their laptop solutions work better than their desktop oriented one, I haven't tested those.
ZeroCore doesn't even work at all on Windows 10 and AMD has said it never will.
I'm certainly curious about the DG1s numbers and performance in this area.
Neither does Nvidia for desktop. Mobile is not the same.
Ultimately ZeroCore Power isn’t a brand new concept, but this is the first time we’ve seen something quite like this on the desktop. Even AMD will tell you the idea is borrowed from their mobile graphics technology, where they need to be able to power down the GPU completely for power savings when using graphics switching capabilities. But unlike mobile graphics switching AMD isn’t fully cutting off the GPU, rather they’re using power islands to leave the GPU turned on in a minimal power state.