I see about what you see with my p4000.
@BoinB, @Charles, @Holo, All -
Jeff has been digging into this today and what he found, and it worked here as well, is that this setting, Power management mode, in the NVidia control panel:
needs to be set as in the image: NVidia driver-controlled.
If you can try this and report back that would be helpful - thanks.
-Pascal