Please don't set by default "Prefer Maximum Performance" in the nvidia application profile. It unnecessarily forces the GPU frequency to stay higher than it needs to be, which means higher heat production and higher fan noise. I have it on the default setting of "Normal" and everything is fine. There's no point in having 1ms render times, when you have at least 16 ms in the worst case scenario (60 Hz video) for rendering while common 23.976 fps film has 42 ms available for rendering a frame. The driver will adjust the GPU clock higher if there's a need anyway.
I do have another issue new to MC29 to report though. I initially thought I must have imagined it, but it repeated several times now. While watching a movie, sometimes it happens the screen is completely black for 3-4 seconds, while the audio is playing normally in the background. Just as this black screen happened, it suddenly goes away too and the image is back as if nothing happened. If it happens, it doesn't happen more than once during the duration of a movie. And it happens very seldom, like once every two-three days. Has anyone else noticed that?
PS: it could also be my new HDMI cable, which I also changed recently, though it's from the same series, only went from 3m to 1m, and it never happened while not watching movies....